Book of Abstracts Presented at the International Conference on Numerical Modelling in Engineering (NME 2024)

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Scientific Books of Abstracts, Vol. 5, pp -1-0

© 2024 The Author(s). Published by Trans Tech Publications Ltd, Switzerland.

Accepted:
2024-08-12

Online:
2024-08-29

Preface

This book contains the abstracts presented at the International Conference on Numerical Modelling in Engineering (NME 2024). NME 2024 was the NME meeting and was held in Xi'an, China, during the period 28-31 July 2024. Previous NME conferences were celebrated in Ghent, Belgium (2018), Beijing, China (2019), and Ghent, Belgium (2020-2023).
The overall objective of the conference is to bring together international scientists and engineers in academia and industry in fields related to advanced numerical techniques, such as FEM, BEM, IGA, etc., and their applications to a wide range of engineering disciplines. The conference covers industrial engineering applications of numerical simulations to civil engineering, aerospace engineering, materials engineering, mechanical engineering, biomedical engineering, etc.
The organising committee is grateful to the keynote speaker, Professor Jeng-Tzong Chen, Distinguished Chair Professor, Department of Harbor and River Engineering, National Taiwan Ocean University, for his keynote speech entitled "Recent development on the double-degeneracy mechanism of the BEM/BIEM", and to the keynote speaker, Professor Lihua Wang, Professor, School of Aerospace Engineering and Applied Mechanics, Tongji University, for her keynote speech "Improved artificial neural network algorithms and its applications for non-destructive testing".
Finally, the organising committee would like to thank all authors who contributed to this edition and to those who presented their research work at the conference.

Professor Magd Abdel Wahab
Chairman of NME 2024

Committee

Organising Committee

Chairman: Professor Magd Abdel Wahab, Laboratory Soete, Ghent University, Belgium
Co-Chairman: Prof. Yun-Lai Zhou, Xi'an Jiaotong University, China

International Scientific Committee

Prof. L. Vanegas Useche, Universidad Tecnológica de Pereira, Colombia
Prof. Hung Nguyen-Xuan, HUTECH, Vietnam
Prof. Timon Rabczuk, Bauhaus University Weimar, Germany
Prof. Xiaoying Zhuang, Leibniz Unversität Hannover, Germany
Dr. C Le Thanh, Open University Ho Chi Minh City, Vietnam
Dr. Y.L. Zhou to Xi'an Jiaotong University, China
Prof. Lihau Wang, Tongji University, Shanghai, China
Dr. Qi Zhao, Hubei University of Automotive Technology, China
Dr. Yong Ling, Ghent University, Belgium
Prof. Mojtaba Ayatollahi, University of Zanjan, Iran
Dr. Ho Viet Long, University of Transport and Communications, Vietnam
Dr. Hoang Le Minh, Open University Ho Chi Minh City, Vietnam
Dr Feiyang Wang, University of Shanghai for Science and technology
Dr. Francesco Petrini, Sapienza University of Rome, Italy
Dr. Ilaria Fiore, University of Catania, Italy
Dr. Christine Detournay, Itasca Consulting Group, USA
Dr. Desmond Adair, Nazarbayev University, Republic of Kazakhstan
Dr. Cristhian Mendoza, National University Of Colombia
Dr. Carlos Frajuca, Rio Grande Federal University, Brazil
Dr Hafiz T Ali, Taif University, KSA
Professor Raul Duarte Salgueiral Gomes Campilho, Instituto Superior de Engenharia do Porto, Portugal
Assoc. Prof. Ángel A. San-Blas, Miguel Hernandez University of Elche, SPAIN

Table of Contents

Preface and Committee

Numerical Analysis of the Effect of FGM Coatings on Fretting Fatigue Behavior

Can Wang, Magd Abdel Wahab

Numerical Investigation to Predict the Geometrical and Mechanical Properties of a Flow-Formed Workpiece Using 1.7220 Steel

Acar Can Kocabıçak, Magd Abdel Wahab

Numerical Modeling of Fretting Wear Considering the Effect of Corrosion

Muhammad Imran, Magd Abdel Wahab

Mitigation of Noise and Other Variations in Vibration Responses for Damage Characterization for Damage Detection in Composites

Muhammad Irfan Shirazi, Magd Abdel Wahab

Predicting Initial In Situ Stresses in Dam Sites Using an Advanced Meta Model

Yi Fei Li, Mao Sen Cao, Magd Abdel Wahab

Damage Identification in Bridge Structure Using Long Short-Term Memory Networks

Ngoc Lan Nguyen, Nguyen Huu Quyet, Nguyen Bao-Lam, Bui Tien Thanh, Magd Abdel Wahab

Isogeometric Vibration Analysis of Auxetic Honeycomb Sandwich Plates

Usama Hamid, Magd Abdel Wahab

Numerical Modelling of Fretting Fatigue Behavior at Elevated Temperatures

Bilal Ahmed, Can Wang, Magd Abdel Wahab

Tribological and Residual Mechanical Properties of Hoisting Wire Rope in Different Contact States

Gao Fang Wang, Yu Xing Peng, Magd Abdel Wahab

A Radial Basis Function Collocation Method for the High-Order Korteweg-De Vries Equations

Zhi Yuan Xue, Lihau Wang, Magd Abdel Wahab

Enhanced ANN Predictive Model of Porous Sandwich Functionally Graded Plates Reinforced with Graphene Nanoplatelets Using Isogeometric Analysis

Jianfu Bai, Magd Abdel Wahab

Numerical Modelling of Fretting Damage Considering Oxidized Layer at High Temperatures

Chao Li, Magd Abdel Wahab

Finite Element Modelling of Cup Drawing Process

Ying Jian Guo, Magd Abdel Wahab

Revealing the Effect of Contact Stress on the Fretting Fatigue Life: From the Perspective OF Crack Propagation

Kaifa Fan, Dao Xin Liu, Can Wang, Magd Abdel Wahab

Modelling of Single Lap Functionally Graded Adhesively Bonded Joint Using Finite Element Analysis

Yanan Zhang, Magd Abdel Wahab

Utilizing Fiber Optic Gratings to Investigate the Dynamic Characteristics of Structures under Thermal Processes

Jui Chi Lin, Chien Ching Ma

Theoretical Analysis, Numerical Calculation and Experimental Measurement on Transient Wave Propagation of Structure for Multi-Span Plate

Guo Zhao Dai, Chien Ching Ma

Multi-Hazard Analysis of Steel Buildings Subjected to Earthquake and Fire

Niccolò Moroni, Mattia Francioli, Alessandro Guarnieri, Francesco Petrini

On the Microstructure and Diffusion Transformation of PrecipitationHardened Sterling Silver for Jewelry Application

Pornnapha Denjarukul, Sawitchaya Sinpromma, Adiruj Peerawat, Thanut Jintakosol, Chayankittipat Yongperakul, Kageeporn Wongpreedee

Damage Detection for Truss Bridge Structure Using Xgboost

Nguyen Huu Quyet, Tran Ngoc Hoa, Ngoc Lan Nguyen, Bui Tien Thanh

A Computational Fluid Dynamics Model for Tornado Wind Turbine

Omar Sami Abdelfatah, Yehia A. Eldrainy, Ali I. Shehata, Ahmed S. Shehata

On the Question of Applying One Creep Model with a Real Structural Parameter in the Mechanics of Deformable Solids

Rafael Shaikhutdinov

Scattering of Flexural Wave in a Thin Plate with Multiple Circular Inclusions by Using Indirect BIEM and Addition Theorem

Wei Ming Lee

Keywords Index

Authors Index

The original version of this eBook is available on https://www.scientific.net/book/book-of-abstracts-presented-at-the-7th-international-conference-on-numerical-modelling-in-engineering-nme-2024/978-3-0364-1473-7

Scientific Books of Abstracts, Vol. 5, pp 1-2

© 2024 The Author(s). Published by Trans Tech Publications Ltd, Switzerland.

Submitted:
2024-04-16

Revised:
2024-07-02

Accepted:
2024-07-02

Online:
2024-08-29

Numerical Analysis of the Effect of FGM Coatings on Fretting Fatigue Behavior

Can Wang, and Magd Abdel Wahab

Soete Laboratory, Department of Electrical energy, metals, mechanical constructions and systems, Faculty of Engineering and Architecture, Ghent University

can.wang@ugent.be, magd.abdelwahab@ugent.be

*Corresponding author

Keywords: fretting fatigue; FGM coating; damage parameter, crack initiation; crack propagation; Linear Elastic Fracture Mechanics

Abstract

Fretting fatigue occurs when engineering components are subjected to cyclic loading while in contact with each other. This complex phenomenon often leads to premature failure compared to traditional fatigue issues. One effective solution involves using Functionally Graded Materials (FGM). In FGM, the ceramic phase provides excellent heat resistance and wear resistance, and the metal phase offers robust mechanical properties. This combination reduces the likelihood of catastrophic failures. FGM has found widespread applications in the engineering field and is gaining popularity in aerospace due to its ability to withstand high thermal gradients. A notable application is as a Thermal Barrier Coating (TBC), extensively used in the automotive and aircraft industries.

Several studies have explored FGM coating, encompassing analyses of crack growth, wear, and crack initiation. Chen and Zhu [1] delved into the impact of FGM coating on fretting fatigue crack initiation behavior under out-of-phase conditions. Their investigation involved fretting fatigue experiments and simulation studies on WC-12Co coating, considering the competitive or coupling relationship between fretting wear and fretting fatigue [2]. Pant et al. [3] employed the Element Free Galerkin Method (EFGM) and Extended Finite Element Method (XFEM) to scrutinize fatigue crack growth in FGM coating. Additionally, Pathak [4] conducted fatigue crack growth analysis in FGM using a coupled FE-XFEM approach.

References

X. Chen, X. Zhu, Fretting fatigue analysis of FGM coating under out-of-phase loadings, Tribology International 134 (2019) 165-177.

X.X. Wang, X.C. Ping, X. Zeng, R.J. Wang, Q. Zhao, S.J. Ying, T. Hu, Fretting fatigue experiment and simulation of WC-12Co coating taking into account the wear effects, Surface and Coatings Technology 441 (2022) 128555.

M. Pant, K. Sharma, S. Bhattacharya, Application of EFGM and XFEM for Fatigue Crack growth Analysis of Functionally Graded Materials, Procedia Engineering 173 (2017) 12311238.

H. Pathak, Three-dimensional quasi-static fatigue crack growth analysis in functionally graded materials (FGMs) using coupled FE-XEFG approach, Theoretical and Applied Fracture Mechanics 92 (2017) 59-75.

W.N. Findley, A theory for the effect of mean stress on fatigue of metals under combined torsion and axial load or bending, Journal of Engineering for Industry 81(4) (1959) 301-305.

Smith, J., Watson, P., and Topper, T., "A Stress Strain Function for Fatigue of Metals," Journal of Materials 0022-2453 (JMLSA), 4(5) (1970) 293-298.

A. Fatemi, D.F. Socie, A critical plane approach to multiaxial fatigue damage including out-ofphase loading, Fatigue Fract. Engng Mater. Struct. 11 (3) (1988) 149-165.

E. Giner, M. Tur, A. Vercher, F.J. Fuenmayor, Numerical modelling of crack-contact interaction in 2D incomplete fretting contacts using X-FEM, Tribology International 42(9) (2009) 1269-1275.

C. Wang, K. Pereira, D. Wang, A. Zinovev, D. Terentyev, M. Abdel Wahab, Fretting fatigue crack propagation under out-of-phase loading conditions using extended maximum tangential stress criterion, Tribology International 187 (2023), 108738.

C. Wang, Q. Zhao, Y. Zhou, D. Wang, L. Wang, M. Abdel Wahab, Fretting fatigue crack initiation and propagation behaviours of Ti6Al4V alloy coated by functionally graded material, Composite Structures 343 (2024) 118285.

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The original version of this eBook is available on https://www.scientific.net/book/book-of-abstracts-presented-at-the-7th-international-conference-on-numerical-modelling-in-engineering-nme-2024/978-3-0364-1473-7

Scientific Books of Abstracts, Vol. 5, pp 3-4

© 2024 The Author(s). Published by Trans Tech Publications Ltd, Switzerland.

Submitted:
2024-04-17

Accepted:
2024-06-18

Online:
2024-08-29

Numerical Investigation to Predict the Geometrical and Mechanical Properties of a Flow-Formed Workpiece Using 1.7220 Steel

Acar Can Kocabıçak and Magd Abdel Wahab

Laboratory Soete, Faculty of Engineering and Architecture, Ghent University, Technologiepark

Zwijnaarde 46 B-9052, Belgium

acarcan.kocabicak@ugent.be, magd.abdelwahab@ugent.be

*Corresponding author

Keywords: Flow forming; Metal Forming; Finite Element Method; Plasticity

Abstract

Flow forming is a metal forming process that produces tubular components with remarkable benefits such as enhanced mechanical properties and grain refinement [ 1,2 ]. Compared with conventional machining productions, the process's cost-effectiveness arises from reducing final machining time and saving input material .

References

A. Ghiotti, S. Bruschi, E. Simonetto, T. Magro, L. Madej, Severe plastic deformation by Constrained Backward Flowforming, CIRP Ann. 71 (2022) 253-256. https://doi.org/10.1016/j.cirp.2022.04.013.

F. Li, C. Zhu, S. Zhao, Research on a new counter-roller active spinning process for forming Al alloy thin-walled cylinders, J. Mater. Process. Technol. 326 (2024) 118309. .

P.F. Gao, M. Li, M. Zhan, L. Xing, F. Ma, M.W. Fu, Circumferential twist in flow forming of tubular parts: Characterization, understanding and control, J. Manuf. Process. 65 (2021) 144152. .

X.X. Wang, T. Liu, R.X. Zhang, H.J. Jin, X.N. Zhao, W.H. Wu, J. Cheng, Texture evolution related to static recrystallization during annealing of TA15 alloy tube formed by flow forming, J. Mater. Res. Technol. 24 (2023) 5769-5781. .

Z. Yu, Y. Meng, Y. Zhou, Y. Zhao, Study on multi-roller flow forming process of aluminum alloy cylinders with cross ribs, Int. J. Adv. Manuf. Technol. 125 (2023) 3489-3501. .

R.J. Bhatt, H.K. Raval, Investigation of Effect of Material Properties on Forces during Flow Forming Process, Procedia Eng. 173 (2017) 1587-1594. .

I. Zreid, R. Behnke, M. Kaliske, ALE formulation for thermomechanical inelastic material models applied to tire forming and curing simulations, Comput. Mech. 67 (2021) 1543-1557. .

E. Urig, L. Zhigilei, Finite Element Modeling of Plastic Deformation During Spin Forming of Aluminum 6061-O, (2023).

A.C. Kocabıçak, M.A. Wahab, Simulation Modelling Practice and Theory Multiphysics numerical modelling of backward flow forming process of AISI 5140 steel, Simul. Model. Pract. Theory 121 (2022) 102656. .

B. Podder, P. Banerjee, K. Ramesh Kumar, N.B. Hui, Flow forming of thin-walled precision shells, Sadhana - Acad. Proc. Eng. Sci. 43 (2018) 1-16. .

D. Depriester, E. Massoni, On the damage criteria and their critical values for flowforming of ELI grade Ti64, in: Key Eng. Mater., Trans Tech Publications Ltd, 2014: pp. 1221-1227. .

T.A.D. C.C. Wong, J.Lin, Effects of roller path and geometry on the flow forming of solid cylindrical components, Int. J. Heavy Veh. Syst. 12 (2005) 344-365. .

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The original version of this eBook is available on https://www.scientific.net/book/book-of-abstracts-presented-at-the-7th-international-conference-on-numerical-modelling-in-engineering-nme-2024/978-3-0364-1473-7

Scientific Books of Abstracts, Vol. 5, pp 5-7

© 2024 The Author(s). Published by Trans Tech Publications Ltd, Switzerland.

Submitted:
2024-04-17

Revised:
2024-06-19

Accepted:
2024-06-22

Online:
2024-08-29

Numerical Modeling of Fretting Wear Considering the Effect of Corrosion

Muhammad Imran and Magd Abdel Wahab

Soete Laboratory, Faculty of Engineering and Architecture, Ghent University, Technologiepark

Zwijnaarde 46, B-9052 Zwijnaarde, Belgium

muhammad.imran@ugent.be, magd.abdelwahab@uGent.be

Keywords: Fretting, corrosion, wear, FE simulation.

Abstract

In this research work, numerical simulation techniques have been used for a better understanding of the fretting wear process for different fretting conditions and the numerical results were compared to the experimental results. The fretting wear behavior of steel wire ropes employed in coal mining hoisting systems has also been investigated using a numerical simulation approach [1].

Generally, in a corrosive environment such as coal mining hoisting systems, both fretting wear and fretting corrosion appear between the contacting surfaces of the steel wire ropes [2]. The objective of this study is to develop a numerical model that collectively counts the effect of fretting wear and fretting corrosion on steel wires used in coal mining hoisting systems [3]. For this, an adaptive finite element model has been developed to investigate the fretting wear characteristics, wear surface morphologies, variation of friction between the contacting surfaces, and heat dissipation during the fretting process. A Finite Element (FE) model combining the pre-defined electrochemical equations with the Archard wear equation/Energy wear equation was developed to consider the simultaneous effect of fretting wear and fretting corrosion rates. This process was implemented within the FE model that facilitates precise calculation of passive oxide layer volume variations at the contact surface. This FE model also provides the combined effect of material removal in a corrosive environment due to fretting wear and corrosion throughout the fretting cycles. The numerical simulation analysis for fretting wear and corrosion is explained with a flow chart in Figure 1 [4] [6].

This adaptive FE model not only provides details of the fretting process, but it also shows its flexibility towards different fretting corrosion conditions, various materials with different corrosive environments, contacting geometries, loadings, and fretting amplitudes. So, it provides an effective tool for understanding and modifying fretting corrosion problems faced by steel wires in corrosive coal mine environments.

References

Imran, M., Wang, D., & Wahab, M. A. (2023). Three-dimensional finite element simulations of fretting wear in steel wires used in coal mine hoisting system. Advances in Engineering Software, 184, 103499.

Zhang, D., Shen, Y., Xu, L., & Ge, S. (2011). Fretting wear behaviors of steel wires in coal mine under different corrosive mediums. Wear, 271(5-6), 866-874.

Liu, Z., Guo, T., Ren, H., Correia, J., Liu, J., & Feng, M. Q. (2024). Corrosion-Fretting Fatigue Analysis of Bridge Cables Based on Multifactor Competition Model and TimeDependent Reliability. Journal of Bridge Engineering, 29(1), 04023106

Swaminathan, V., & Gilbert, J. L. (2012). Fretting corrosion of CoCrMo and Ti6Al4V interfaces. Biomaterials, 33(22), 5487-5503.

Fallahnezhad, K., Oskouei, R. H., & Taylor, M. (2018). Development of a fretting corrosion model for metallic interfaces using adaptive finite element analysis. Finite Elements in Analysis and Design, 148, 38-47.

Sriraman, M. R., & Pidaparti, R. M. (2010). Crack initiation life of materials under combined pitting corrosion and cyclic loading. Journal of Materials Engineering and Performance, 19, 7-12.

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The original version of this eBook is available on https://www.scientific.net/book/book-of-abstracts-presented-at-the-7th-international-conference-on-numerical-modelling-in-engineering-nme-2024/978-3-0364-1473-7

Scientific Books of Abstracts, Vol. 5, pp 8-8

© 2024 The Author(s). Published by Trans Tech Publications Ltd, Switzerland.

Submitted:
2024-04-18

Accepted:
2024-06-18

Online:
2024-08-29

Mitigation of Noise and Other Variations in Vibration Responses for Damage Characterization for Damage Detection in Composites

Muhammad Irfan Shirazi , Magd Abdel Wahab

Soete Laboratory, Faculty of Engineering and Architecture, Ghent University, Technologiepark

Zwijnaarde 903, B-9052 Zwijnaarde, Belgium

Keywords: Structural Health Monitoring, Convolution Neural Networks, Real-time damage detection,1D Convolution Neural Networks.

Abstract

Structural Health Monitoring (SHM) is a vital concept aimed at predicting the onset of structural damage in order to optimize maintenance strategies and minimizing losses. Moreover, SHM is crucial for composite structures due to the rise in the use of composites as structural materials. Vibration signal-based techniques have emerged as effective means for damage detection, enabling real-time monitoring systems to identify damages by detecting perceptible changes in structural vibration characteristics. However, since these techniques are signal-based, the effect of noise, fluctuating inputs, and variable vibrations create problems in creating a robust real time damage detecting CNN algorithm. The variability in input data caused by these factors may lead to misclassification or mispredictions in the actual damage problem. This makes the already complex problem of determining the right CNN more difficult. Moreover, the right measure that can quantify the similarity between signals is also required in order to make estimates on the damage resolution ability of the CNNs used in this manner.

There is a wealth of literature that deals with these problems especially in the signal-processing literature. In this study, this literature is thoroughly scanned. The relevant solutions are discussed and their feasibility is assessed. In the end, appropriate techniques to limit the effect of data variability in real-time signal-based damage detection problem, which are the most promising ones, are discussed and deliberated. With the right estimate on the CNNs resistance to ambient or extraneous noise and the ability to quantify similar signals that the CNNs can classify, we can put the CNN damage detection strategy into perspective with respect to other SHM techniques.

The original version of this eBook is available on https://www.scientific.net/book/book-of-abstracts-presented-at-the-7th-international-conference-on-numerical-modelling-in-engineering-nme-2024/978-3-0364-1473-7

Scientific Books of Abstracts, Vol. 5, pp 9-9

© 2024 The Author(s). Published by Trans Tech Publications Ltd, Switzerland.

Submitted:
2024-04-18

Accepted:
2024-06-18

Online:
2024-08-29

Predicting Initial In Situ Stresses in Dam Sites Using an Advanced Meta Model

Yi Fei Li , Mao Sen Cao , Magd Abdel Wahab

Soete Laboratory, Faculty of Engineering and Architecture, Ghent University, Belgium

Department of Engineering Mechanics, Hohai University, Nanjing, China

hhu.edu.cn, magd.abdelwahab@ugent.be

Keywords: Dam sites, In-situ stresses, Polynomial chaos kriging model, Multiple linear regression models, Parameter sensitivity analysis.

Abstract

The determination of initial in-situ stresses at dam sites significantly impact dam safety, and accurately predicting them, are crucial for understanding dam and foundation behavior [1,2]. This study employs an advanced meta model, namely the Polynomial Chaos Kriging (PCK) model, to forecast initial in-situ stresses at dam sites [3]. Using an ultra-high hyperbolic arch dam site as a case study, a three-dimensional fine finite element model of the dam site is initially established. Subsequently, finite element analysis is conducted under six distinct boundary conditions to extract six stress components at each measuring point [4,5]. Finally, a high-precision PCK model is developed by integrating stress data from measured boreholes. The constructed PCK model not only offers superior prediction accuracy compared to conventional multiple linear regression models, but also facilitates parameter sensitivity analysis at a low-cost [6]. The findings suggest that the meta model holds promise for accurately and efficiently predicting in-situ stresses at dam sites.

References

Lin P, Liu H, Zhou W. Experimental study on failure behaviour of deep tunnels under high insitu stresses[J]. Tunnelling and Underground Space Technology, 2015, 46: 28-45.

Meng Z, Zhang J, Wang R. In-situ stress, pore pressure and stress-dependent permeability in the Southern Qinshui Basin[J]. International Journal of Rock Mechanics and Mining Sciences, 2011, 48(1): 122-131.

Li Y F, Cao M S, Hoa T N, et al. Metamodel-assisted hybrid optimization strategy for model updating using vibration response data[J]. Advances in Engineering Software, 2023, 185: 103515.

Zheng M, Li Y, Wang C, et al. Prediction of contact stress in bolted joints using the Polynomial Chaos-Kriging model[J]. Engineering Failure Analysis, 2023, 154: 107646.

Amini A, Abdollahi A, Hariri-Ardebili M A, et al. Copula-based reliability and sensitivity analysis of aging dams: Adaptive Kriging and polynomial chaos Kriging methods[J]. Applied Soft Computing, 2021, 109: 107524.

Li Y F, Hariri-Ardebili M A, Deng T F, et al. A surrogate-assisted stochastic optimization inversion algorithm: Parameter identification of dams[J]. Advanced Engineering Informatics, 2023, 55: 101853.

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Scientific Books of Abstracts, Vol. 5, pp 10-10

© 2024 The Author(s). Published by Trans Tech Publications Ltd, Switzerland.

Submitted:
2024-04-19

Accepted:
2024-06-18

Online:
2024-08-29

Damage Identification in Bridge Structure Using Long Short-Term Memory Networks

Lan Ngoc-Nguyen , Quyet Nguyen-Huu , Bao-Lam Nguyen , Thanh Bui-Tien and Magd Abdel Wahab

Soete Laboratory, Faculty of Engineering and Architecture, Ghent University, Belgium

Faculty of Civil Engineering, University of Transport and Communications, Vietnam

DX Laboratory, The University of Transportation and Communications Limited Company (UCT., LTD), Vietnam

Institut supérieur de mécanique de Paris (ISAE-Supméca), Laboratoire Quartz, 3 rue Fernand Hainaut, 93407 Saint-Ouen-sur-seine cedex, France

ngoclan.nguyen@ugent.be, quyet.official@outlook.com, bao-lam.nguyen@isae-supmeca.fr, btthanh@utc.edu.vn, magd.abdelwahab@ugent.be

Keywords: structural health monitoring, bridge damage identification, times-series data, long shortterm memory.

Abstract

Time-series data is indeed pivotal in the context of Structural Health Monitoring (SHM), particularly for assessing the condition and behavior of infrastructure assets like bridges. Time-series data comprises observations or measurements collected at successive, evenly spaced time intervals, enabling the analysis of how a system changes over time. By leveraging time-series data, researchers and engineers can apply advanced analytical techniques, such as machine learning algorithms. Long Short-Term Memory Networks (LSTM), a specialized variant of Recurrent Neural Networks (RNN), demonstrates a remarkable ability to learn from long-term dependencies and has been effectively applied in various fields, for extracting valuable insights from the temporal behavior of bridge structures. LSTM networks excel at capturing temporal dependencies and patterns in sequential data, making them well-suited for tasks like anomaly detection, damage identification, and prognostics based on time-series sensor data.

This paper focuses on using LSTM for damage identification in bridge SHM, in which the utilization of time-series data is fundamental. The rich dataset enables LSTM models to learn and discern subtle changes indicative of structural damage or degradation over time. Therefore, emphasizing the significance of time-series data in the methodology and results sections of the paper would elucidate the rationale behind employing LSTM networks and underscoring their effectiveness in analyzing temporal patterns for enhancing bridge health monitoring and maintenance practices. Our findings suggest that this approach not only enhances precision but also the reliability of damage detection in bridge health monitoring, offering a proactive tool for maintenance and safety management in bridge infrastructure.

The original version of this eBook is available on https://www.scientific.net/book/book-of-abstracts-presented-at-the-7th-international-conference-on-numerical-modelling-in-engineering-nme-2024/978-3-0364-1473-7

Scientific Books of Abstracts, Vol. 5, pp 11-11

© 2024 The Author(s). Published by Trans Tech Publications Ltd, Switzerland.

Submitted:
2024-04-23

Accepted:
2024-06-18

Online:
2024-08-29

Isogeometric Vibration Analysis of Auxetic Honeycomb Sandwich Plates

Usama Hamid , Magd Abdel Wahab

Soete Laboratory, Department of Electrical Energy, Metals, Mechanical Constructions, and Systems, Faculty of Engineering and Architecture, Ghent University, Belgium

Usama.Hamid@ugent.be, magd.abdelwahab@ugent.be.

Keywords: auxetic honeycomb core, sandwich nanoplates, negative Poisson's ratio, Isogeometric analysis, Optimization.

Abstract

Sandwich plate structures constituted by an auxetic honeycomb core layer with a negative Poisson's ratio and two skin layers reinforced by graphene nanoplatelets (GNPs) are considered in this research work [1]. Because of its excellent strength-to-weight ratio, this design is perfect for uses in structural engineering, automotive, aerospace, and other fields where high strength and lightweight are essential. These materials have special mechanical characteristics at the nanoscale that make them very interesting for novel applications. Classical continuum mechanics theory fails to adequately capture the mechanical properties of microstructures because it ignores size effects [2]. Contrarily, the Nonlocal Strain Gradient Theory (NSGT) is incorporated for better capturing of shear deformation and size effects at nanoscale. The latest technique for the vibration analysis of complex structural configurations, involving auxetic honeycomb sandwich plates, is isogeometric analysis (IGA) [3], that integrates spline-based CAD software with finite element analysis (FEA). Using the continuity and accuracy of Non-Uniform Rational B-Splines (NURBS) for both modeling and analysis, this work gives a thorough vibration analysis of auxetic honeycomb sandwich plates.

References

Nguyen, N.V., et al., A comprehensive analysis of auxetic honeycomb sandwich plates with graphene nanoplatelets reinforcement. Composite Structures, 2021. 259: p. 113213.

Roudbari, M.A., et al., A review of size-dependent continuum mechanics models for microand nano-structures. Thin-Walled Structures, 2022. 170: p. 108562.

Nguyen, V.P., C. Anitescu, S.P.A. Bordas, and T. Rabczuk, Isogeometric analysis: An overview and computer implementation aspects. Mathematics and Computers in Simulation, 2015. 117: p. 89-116.

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Scientific Books of Abstracts, Vol. 5, pp 12-12

© 2024 The Author(s). Published by Trans Tech Publications Ltd, Switzerland.

Submitted:
2024-04-24

Accepted:
2024-06-18

Online:
2024-08-29

Numerical Modelling of Fretting Fatigue Behavior at Elevated Temperatures

Bilal Ahmed , Can Wang , Magd Abdel Wahab

Soete Laboratory, Department of Electrical Energy, Metals, Mechanical Constructions and Systems, Faculty of Engineering and Architecture, Ghent University, Belgium

*Corresponding author: magd.abdelwahab@ugent.be

Keywords: Fretting fatigue; elevated temperature; numerical modelling.

Abstract

The contacting surfaces in components produce relative slip amplitude resulting in fretting fatigue. Fretting fatigue significantly reduces service life of such components. The major portion of total lifespan of components subjected to fretting fatigue lies in crack nucleation and propagation phases [1]. The fretting fatigue properties are affected by high temperature conditions due to changes in material properties. Temperature effect on material behavior under fretting fatigue has been investigated by the researchers. Generally, fretting fatigue investigations at elevated temperatures have shown a decrease in life [ ]. However, in some cases formation of oxide layer at high temperature resulted in improvement in fretting fatigue life [5]. In the present work, a numerical model will be developed to study fretting fatigue behavior at elevated temperatures. A cylinder-on plane configuration will be modelled using finite element method to study the effect of temperature on crack nucleation and propagation. Crack nucleation will be predicted using both the hotspot and quadrant averaging methods. The proposed model will be validated with the available experimental data in literature.

References

Bhatti, N. A., & Wahab, M. A. (2018). Fretting fatigue crack nucleation: a review. Tribology International, 121, 121-138.

Almeida, G. M. J., Cardoso, R. A., Chassaing, G., Pommier, S., & Araújo, J. A. (2023). Fretting fatigue of Inconel 718 at room and elevated temperatures considering both constant and cyclic normal contact loads. Tribology International, 183, 108382.

Garcia, M. A., Badibanga, R. K., Araújo, J. A., Ferreira, J. L., & da Silva, C. R. M. (2024). Fretting fatigue tests on 6201-T81 aluminum alloy conductor wires at room temperature and . Wear, 205321.

Su, Y., Han, Q. N., Zhang, C. C., Shi, H. J., Niu, L. S., Deng, G. J., & Rui, S. S. (2019). Effects of secondary orientation and temperature on the fretting fatigue behaviors of Ni-based single crystal superalloys. Tribology International, 130, 9-18.

Waterhouse RB. Fretting at high temperatures. Tribology Int 1981:203

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Scientific Books of Abstracts, Vol. 5, pp 13-13

© 2024 The Author(s). Published by Trans Tech Publications Ltd, Switzerland.

Submitted:
2024-04-29

Revised:
2024-07-02

Accepted:
2024-07-02

Online:
2024-08-29

Tribological and Residual Mechanical Properties of Hoisting Wire Rope in Different Contact States

Gaofang Wang , Yuxing Peng and Magd Abdel Wahab

School of Mechanical and Electrical Engineering and Jiangsu Key Laboratory of Mine Mechanical and Electrical Equipment, China University of Mining and Technology, Jiangsu Province, Xuzhou, 221116, China

Jiangsu Collaborative Innovation Center of Intelligent Mining Equipment, Xuzhou, China

Soete Laboratory, Department of Electrical energy, metals, mechanical constructions and systems, Faculty of Engineering and Architecture, Ghent University

Wangfangf@cumt.edu.cn, pengyuxing@cumt.edu.cn, magd.abdelwahab@ugent.be

Keywords: Wire rope, contact angle, different environment, tribological properties, residual mechanical properties.

Abstract

The lifting wire rope will inevitably bear the tension from the load and extrusion pressure during the winding of the drum. Due to the existence of chaotic rope and other conditions during the winding process, it causes different contact states and friction and wear between ropes. It also causes breakage to the wires. In this paper, the frictional wear and residual mechanical properties of lifting wire rope under different contact conditions are simulated experimentally. Firstly, a test platform is constructed based on the contact mode, and the state of the wire rope running under different environments is simulated by the environmental simulation device and the application of tension force. Then, to obtain the friction and wear characteristics under different contact angles and environments the friction and wear test of the wire rope is carried out by reciprocating micro-motor. Finally, the residual tensile strength and bending fatigue life of the wire rope are obtained by tensile breaking machine and bending fatigue testing machine. The results show that the maximum surface contact damage area is the largest when the upper and lower ropes are in parallel contact. At the same time, the maximum contact wear area decreases with the increase of the contact cross angle. When the contact parameters are the same, the wear parameters are different in different environments, and the residual mechanical properties are different.

The original version of this eBook is available on https://www.scientific.net/book/book-of-abstracts-presented-at-the-7th-international-conference-on-numerical-modelling-in-engineering-nme-2024/978-3-0364-1473-7

Scientific Books of Abstracts, Vol. 5, pp 14-14

© 2024 The Author(s). Published by Trans Tech Publications Ltd, Switzerland.

Submitted:
2024-05-19

Revised:
2024-06-18

Accepted:
2024-06-19

Online:
2024-08-29

A Radial Basis Function Collocation Method for the High-Order Korteweg-De Vries Equations

Zhiyuan Xue , LIhua Wang and Magd Abdel Wahab

School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai, PR China, 200092

Soete Laboratory, Department of Electrical Energy, Metals, Mechanical Constructions, and Systems, Faculty of Engineering and Architecture, Ghent University, Gent, Belgium, 9000

Zhiyuan.Xue@ugent.be, Ihwang@tongji.edu.cn, magd.abdelwahab@UGent.be

Keywords: Radial basis collocation method, KdV equations, high accuracy, super-convergence.

Abstract

In this study, we numerically investigate the high-order Korteweg-de Vries (KdV) equations [1-2], which is an important model for describing many wave propagation phenomena, using the Radial Basis Function Collocation Method (RBCM) [3-5]. This method uses the inverse MultiQuadric Radial Basis Function (MQ-RBF) [6] for approximation, discretizes the governing equations by the collocation method, and solves them using the least squares method. Unlike traditional mesh-based methods such as Finite Element Method (FEM) and Finite Difference Method (FDM), which require mesh for field approximation and integration, RBCM does not necessitate any form of mesh in the whole solution process, making it as a genuine meshfree method [4-5]. The simple form of inverse MQ-RBF is not only easy to store and operate directly, but also can be globally supported and infinitely differentiated, so it is especially suitable for high-order KdV equations. No integration operation is required based on the collocation method, which improves the computational efficiency [7-8]. The temporal-spatial domain of the KdV equation is discretized by combining the RBCM with the forward difference method, and the migration and collision of solitons are numerically investigated. Comparison with the analytical solution demonstrates the high accuracy and super-convergence of RBCM, and that its invariant is always maintained during the soliton motion.

References

D.J. Korteweg-de Vries, G. de Vries, On the change in form of long waves advancing in rectangular canal and on a new type of long stationary waves, Philos. Mag. 39 (1895) 422-443.

A.V. Slunyaev, A.V. Kokorina, E.N. Pelinovsky, Nonlinear waves, modulations and rogue waves in the modular Korteweg-de Vries equation, Commun. Nonlinear Sci. Numer. Simul. 127 (2023) 107527.

E.J. Kansa, Multiquadrics scattered data approximation scheme with applications to computational fluid-dynamics. I. surface approximations and partial derivative estimates, Comput. Math. Appl. 19 (1990) 127-145.

L. Wang, Radial basis functions methods for boundary value problems: Performance comparison, Eng. Anal. Bound. Elem. 84 (2017) 84 191-205.

L. Wang, Z. Wang, Z. Qian, A meshfree method for inverse wave propagation using collocation and radial basis functions. Comput. Methods Appl. Mech. Eng. 322 (2017) 311-350.

RL. Hardy, Multiquadric equations of topography and other irregular surfaces. J. Geophys Res. 76 (1971) 1905-1915.

K. Al-Khaled, N. Haynes, W. Schiesser, M. Usman, Eventual periodicity of the forced oscillations for a Korteweg-de Vries type equation on a bounded domain using a sinc collocation method, J. Comput. Appl. Math. 330 (2018) 417-428.

J. Wang, M. Hillman, Upwind reproducing kernel collocation method for convectiondominated problems. Comput. Methods Appl. Mech. Eng. 420 (2024) 116711.

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Scientific Books of Abstracts, Vol. 5, pp 15-15

© 2024 The Author(s). Published by Trans Tech Publications Ltd, Switzerland.

Submitted:
2024-05-19

Accepted:
2024-06-18

Online:
2024-08-29

Enhanced ANN Predictive Model of Porous Sandwich Functionally Graded Plates Reinforced with Graphene Nanoplatelets Using Isogeometric Analysis

Jianfu Bai and Magd Abdel Wahab

Soete Laboratory, Department of Electrical Energy, Metals, Mechanical Constructions, and Systems, Faculty of Engineering and Architecture, Ghent University, Belgium

ajianfu.bai@ugent.be, b*magd.abdelwahab@ugent.be.

Keywords: Artificial Neural Network (ANN), First nature frequency, Isogeometric Analysis (IGA), Sandwich functionally graded plates, Ameliorated golden jackal optimizer (AGJO)

Abstract

This abstract proposes an enhanced Artificial Neural Network (ANN) model to predict the first nature frequency of porous sandwich functionally graded plates reinforced with Graphene Nanoplatelets (GNP). An isogeometric analysis (IGA) model of this structure is built based on the Non-Uniform Rational B-Splines (NURBS), effective material properties calculated by the HalpinTsai model and the rule of mixture, and the refined plate theory [1]. The IGA model ensures the accuracy of results and reduces time-consuming [2]. Further, ANN is applied to improve its computational efficiency. Meta-heuristic optimization algorithm is a gradient-free method and has been applied to the optimization of ANN hyperparameters [3, 4]. An enhanced ANN predictive based on Ameliorated Golden Jackal Optimizer (AGJO) is used to find the optimal mapping from the input dataset consisting of multiple parameters such as porosity and weights of GPL to the output data of the first nature frequency. Compared to other enhanced ANN predictive models using other metaheuristic optimization algorithms, the enhanced ANN predictive model using AGJO shows the most accurate prediction performance. Therefore, the ANN predictive model combining with AGJO is a potential method to predict the vibration frequency of this IGA model.

References

Nguyen NV, Nguyen-Xuan H, Lee J. A quasi-three-dimensional isogeometric model for porous sandwich functionally graded plates reinforced with graphene nanoplatelets. Journal of Sandwich Structures & Materials. 2022;24:825-59.

Hughes TJR, Cottrell JA, Bazilevs Y. Isogeometric analysis: CAD, finite elements, NURBS, exact geometry and mesh refinement. Computer Methods in Applied Mechanics and Engineering. 2005;194:4135-95.

Bai J, Li Y, Zheng M, Khatir S, Benaissa B, Abualigah L, et al. A Sinh Cosh optimizer. Knowledge-Based Systems. 2023;282.

Bai J, Khatir S, Abualigah L, Abdel Wahab M. Ameliorated Golden jackal optimization (AGJO) with enhanced movement and multi-angle position updating strategy for solving engineering problems. Advances in Engineering Software. 2024; 194.

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Scientific Books of Abstracts, Vol. 5, pp 16-16

© 2024 The Author(s). Published by Trans Tech Publications Ltd, Switzerland.

Submitted:
2024-05-21

Accepted:
2024-06-18

Online:
2024-08-29

Numerical Modelling of Fretting Damage Considering Oxidized Layer at High Temperatures

Chao and Magd Abdel Wahab

¹Laboratory Soete, Department of ElectroMechanical, Systems and Metal Engineering, Faculty of Engineering and Architecture, Ghent University, Belgium

Chao.Li@UGent.be, *Corresponding author: magd.abdelwahab@ugent.be

Keywords: Fretting Wear; Finite Element Method (FEM); High Temperature; Oxidized Layer

Abstract

This study investigates the formation process of the oxidized layer resulting from fretting wear at high temperatures. Fretting wear refers to the progressive material loss that occurs on contact surfaces of components experiencing micro relative vibration [ 1,2 ]. During this process, debris particles are often generated and trap in the closely contacting surfaces [3]. At elevated temperatures, these compacted debris particles are exposed to air [4]. The frictional action during fretting wear leads to the sintering of these particles, forming an oxidized layer [5]. Due to the microscopic scale of the debris, it is challenging to measure the formation process of the oxidized layer through experiments. Therefore, this study employs the Finite Element Method (FEM) to simulate the fretting wear process and the formation of the associated oxidized layer. A two-dimensional model incorporating a third layer is developed to represents the oxidized layer formation process. Additionally, the work examines various formation processes under different fretting wear conditions, including temperature, frequency, normal load, and displacement amplitude. The influence of the debris layer on contact pressure distribution is investigated. Furthermore, the impact of this third body oxide layer formed at the interface on wear resistance is explored.

References

Hurricks P L. The mechanism of fretting - A review. Wear 15: 389-409 (1970)

Li C, Amanov A, Wang C, Wang L, Abdel Wahab M. Effect of laser shock peening on fretting wear behaviour of AISI 304 stainless alloy. Tribol Int 193: 109386 (2024)

Zhu T, Shipway P H. Contact size and debris ejection in fretting: The inappropriate use of Archard-type analysis of wear data and the development of alternative wear equations for commonly employed non-conforming specimen pair geometries. Wear 474-475: 203710 (2021)

Guo X, Lai P, Li L, Tang L, Zhang L. Progress in studying the fretting wear/corrosion of nuclear steam generator tubes. Ann Nucl Energy 144: 107556 (2020)

Leheup E R, Deen Z, Moon J R. The effect of density on fretting wear of sintered iron. Wear 176: 111-9 (1994)

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Scientific Books of Abstracts, Vol. 5, pp 17-17

© 2024 The Author(s). Published by Trans Tech Publications Ltd, Switzerland.

Submitted:
2024-05-28

Accepted:
2024-06-18

Online:
2024-08-29

Finite Element Modelling of Cup Drawing Process

Yingjian Guo , Magd Abdel Wahab

Laboratory Soete, Ghent University, Belgium

Yingjian.Guo@UGent.be, Magd Abdel Wahab@UGent.be

Keywords: Deep drawing, finite difference method

Abstract

The deep drawing deformation process is exceedingly complex, influenced by various process parameters such as mold geometry, blank holder force, and temperature [1, 2]. For engineering plasticity problems, such as stamping of cylindrical cup, the computational methods primarily include mechanical analytical methods and numerical computational methods [3,4,5,6]. When using mechanical analysis to solve these issues, it is typically assumed that the blank thickness changes uniformly and that simple loading conditions are applied, which does not accurately reflect the actual conditions. Finite element numerical computations, on the other hand, involve dealing with nonlinearities related to geometry, materials, and contact, which require significant computational effort and time due to the complex interactions involved. Given the axial symmetry of cylindrical cup parts, an incremental finite difference model based on the deep drawing process provides a complete numerical analysis of stress, strain states, and distributions. However, this model contains unknown moving boundary conditions, and the mechanical and geometric models in different deformation areas vary, making it challenging to accurately determine thickness values and contact angles to achieve convergence. In this research work, we propose an efficient finite element model of cup drawing process.

References

Colgan, Mark, and John Monaghan. "Deep drawing process: analysis and experiment." Journal of materials processing technology 132.1-3 (2003): 35-41.

Chung, S. Y., and H. W. Swift. "Cup-drawing from a flat blank: Part I. Experimental investigation." Proceedings of the institution of mechanical engineers 165.1 (1951): 199-211.

Al-Makky, M. M., and D. M. Woo. "Deep-drawing through tractrix type dies." International Journal of Mechanical Sciences 22.8 (1980): 467-480.

Choi, Ho, Muammer Koc, and Jun Ni. "A study on the analytical modeling for warm hydromechanical deep drawing of lightweight materials." International Journal of Machine Tools and Manufacture 47.11 (2007): 1752-1766.

Assempour, Ahmad, and Ehsan Taghipour. "The effect of normal stress on hydro-mechanical deep drawing process." International Journal of Mechanical Sciences 53.6 (2011): 407-416.

Luyen, The-Thanh, Van-Canh Tong, and Duc-Toan Nguyen. "A simulation and experimental study on the deep drawing process of SPCC sheet using the graphical method." Alexandria Engineering Journal 61.3 (2022): 2472-2483.

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Scientific Books of Abstracts, Vol. 5, pp 18-19

© 2024 The Author(s). Published by Trans Tech Publications Ltd, Switzerland.

Submitted:
2024-05-29

Accepted:
2024-06-18

Online:
2024-08-29

Revealing the Effect of Contact Stress on the Fretting Fatigue Life: From the Perspective OF Crack Propagation

Kaifa Fan , Daoxin Liu , Can Wang and Magd Abdel Wahab

Soete Laboratory, Faculty of Engineering and Architecture, Ghent University, Belgium

Corrosion and Protection Research Laboratory, School of Civil Aviation, Northwestern Polytechnical University, China

kaifa.fan@ugent.be, liudaox@nwpu.edu.cn, can.wang@UGent.be

magd.abdelwahab@UGent.be

Keywords: Fretting fatigue, Crack closure effect, Contact stress, Finite element method

Abstract

In the previous research, it was found that the fretting fatigue (FF) life tended to decrease and then increase as the contact stress increased [1]. However, in the numerical simulation, it was found that as the contact stress increased, the local stress concentration increased and the value of the damage parameter increased. Therefore, in this study, the effect of contact stress on fretting fatigue life is investigated from the perspective of crack propagation. The crack closure effect is introduced into the numerical model, and it is found that the crack closure effect caused by the increase in contact stress effectively hinders the early crack propagation. This study suggests that the prediction of fretting fatigue life should be tailored to the whole process of crack initiation and propagation.

The fretting fatigue behaviors of TC11 titanium alloy after ultrasonic surface rolling process (USRP) were predicted using the SWT model [1]. It was found that the predictions for crack initiation location, initiation direction and FF life were in good agreement with the experimental results, and the FF life was distributed within the error band. However, it was found that the value of SWT increased with contact stress, resulting in a gradual decrease in the predicted FF life. In contrast, the FF life of the USRP specimens tended to decrease and then increase with increasing contact stress in the experiments. The reason for the discrepancy between the simulated and experimental results may be that the SWT parameters are strongly influenced by the surface stress-strain field, while the main reason for USRP to improve the FF life of TC11 titanium alloys is to prolong the propagation life in the depth from to [2]. Therefore, a crack propagation model is required to investigate the influence of contact stress on FF life.

According to the experimental setup and loading conditions of the FF life test, a two-dimensional finite element model was created in Abaqus, and the boundary symmetry conditions were set according to the experimental setups. The mesh of the contact area was refined and mesh convergence analysis was carried out, and the minimum size was set at in consideration of the computation time and accuracy. Material parameters were set as follows Young's modulus , Poisson's ratio . The plastic parameters were set according to the tensile stress-strain curve of TC11 titanium alloy. The tangential contact conditions were set using the penalty function method, with the coefficient of friction set at 0.95 for BM specimens and 0.75 for USRP specimens. Crack initiation was performed using the weld tool in Abaqus. The step size for crack propagation was set to the critical crack length ac in fracture mechanics [3], and for the TC11 titanium alloy, the .

Run the model to obtain the stress intensity factors and at the crack tip and calculate the effective stress intensity factor . And calculate the crack propagation life using Paris' law. In addition, the maximum tangential stress law is used to calculate the next crack propagation direction. The crack propagation step is repeated until the crack length reaches the critical fracture length.

The predicted results of crack propagation show that the values of SWT at the surface increase with contact stress, which is in agreement with the results of previous studies [1]. During the crack propagation process, the stress intensity factor of the crack at the subsurface gradually decreases with the increase in contact stress, indicating that the increase in contact stress helps to slow down the crack propagation at greater depths. This result explains the phenomenon of an upward trend in the life of USRP specimens as the contact stress increases.

References

Fan K, Liu D, Wang C, Yang J, Liu Y, Zhang X, et al. Effect of contact stress and slip amplitude on fretting fatigue behaviour of ultrasonic surface nanocrystallized TC11 titanium alloy. Journal of Materials Research and Technology 2024; 28: 4052-64. https://doi.org/10.1016/ j.jmrt.2024.01.020.

Fan K, Liu D, Zhang X, Liu D, Zhao W, Yang J, et al. Effect of residual stress induced by ultrasonic surface rolling on fretting fatigue behaviors of Ti-6Al-4V alloy. Engineering Fracture Mechanics 2022;259. .

Elhaddad M, Dowling N, Topper T, Smith K. J-Integral Applications for Short Fatigue Cracks at Notches. Int J Fract 1980;16:15-30. .

Liu L. Modeling of mixed-mode fatigue crack propagation, 2008.

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Scientific Books of Abstracts, Vol. 5, pp 20-20

© 2024 The Author(s). Published by Trans Tech Publications Ltd, Switzerland.

Submitted:
2024-06-09

Accepted:
2024-06-18

Online:
2024-08-29

Modelling of Single Lap Functionally Graded Adhesively Bonded Joint Using Finite Element Analysis

Yanan Zhang , Magd Abdel Wahab

Soete Laboratory, Department of Electrical Energy, Metals, Mechanical Constructions, and Systems, Faculty of Engineering and Architecture, Ghent University, Belgium

Yanan.Zhang@UGent.be, Magd.AbdelWahab@UGent.be

Keywords: Functionally Graded Adhesive Joints; Finite Element Method; Stress Analysis

Abstract

The stress singularity near the overlap endpoints is the main reason for the failure in adhesive joints [1-2]. Functionally Graded Adhesive Joints (FGAJs) have strong and efficient mechanical properties that vary gradually along the overlap length, reducing shear and peel stress concentration at the joint edges and increasing joint failure load [3-4]. In this study, we propose a new application based on Finite Element Method (FEM) that can accurately and effectively predict the stress distribution in modulus-graded bonding systems. Furthermore, FGAJs with greater load-bearing capacity can be obtained by modifying the position and relative length of adhesives with different modulus along the bonding line [5]. It has been shown that functionally graded adhesives can significantly reduce the stress singularity at the bonded end of the joint, while the improvement of the joint strength is also affected by the type of adherends.

References

Wei Y, Jin X, Luo Q, Li Q, Sun G. Adhesively bonded joints-A review on design, manufacturing, experiments, modeling and challenges. Composites Part B: Engineering. 2024, 17: 111225.

Boulenouar, Abdelkader, Mohammed A. Bouchelarm, and Meriem Chafi. "Numerical investigation of cracked metal/ceramic FGM plates repaired with bonded composite patch." International Journal on Interactive Design and Manufacturing (IJIDeM). 2024, 18: 649-658.

Kumar D, Budarapu PR, Pradhan AK. Numerical analysis of lap shear joints made of functionally graded materials. Journal of the Brazilian Society of Mechanical Sciences and Engineering. 2023, 45(2): 94.

Jia Z, Yu J, Liu Q, et al. Functionally graded adhesive joints with exceptional strength and toughness by graphene nanoplatelets reinforced epoxy adhesives[J]. International Journal of Adhesion and Adhesives, 2023, 125: 103402.

Benali A, Cellard C, Sohier L, Moretti A, Créac'Hcadec R. Modelling edge effects at the interface in bonded joints using gradient functions in the mechanical properties of the adhesive: Application of the method to the Arcan test loaded in tension and shear. International Journal of Adhesion and Adhesives. 2023, 120: 103294.

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Scientific Books of Abstracts, Vol. 5, pp 21-21

© 2024 The Author(s). Published by Trans Tech Publications Ltd, Switzerland.

Submitted:
2024-06-14

Revised:
2024-06-24

Accepted:
2024-06-27

Online:
2024-08-29

Utilizing Fiber Optic Gratings to Investigate the Dynamic Characteristics of Structures under Thermal Processes

Jui-Chi Lin and Chien-Ching Ma

¹Department of Mechanical Engineering, National Taiwan University,

Taipei City 106319, Republic of China

d10522012@ntu.edu.tw, ccma@ntu.edu.tw

Keywords: Fiber Optic Grating, thermal behavior, dynamic characteristics

Abstract

This study investigates the thermal behavior and transient measurements using fiber Bragg grating (FBG) sensors on a cantilever plate system, focusing on environments subjected to heating processes and dynamic impacts. Earlier research has demonstrated the transient behavior of cantilever plates. Furthermore, previous studies have utilized optical fiber Bragg gratings to monitor structural damage. This study employs FBG sensors to examine the transient behavior of cantilever plates at various temperatures, complemented by the use of thermocouples for simultaneous temperature monitoring. This setup enables the analysis of thermal strain and the calculation of the thermal expansion coefficient using the wavelength data from the FBG sensors. Additionally, this research assesses the impact of geometric dimensions and boundary conditions on the thermal behavior of the cantilever thin plate system and investigates how varying temperatures affect the system's dynamic characteristics and the sensitivity of material constants to temperature. Notably, analyzing the resonance frequencies under different temperature loads reveals the temperature dependence of material constants, a critical aspect for precise structural health evaluation in mechanical engineering. The examination of the cantilever thin plate system's thermal behavior, especially when combined with dynamic impact signal measurements, offers detailed insights into material responses under thermal loads. This methodological approach facilitates the development of structural health monitoring techniques, essential for ensuring safety and reliability in engineering applications.

References

G.S. Hwang, C.C. Ma, and D.W. Huang. Dynamic strain measurements of a cantilever using the improved bonding fiber Bragg grating. Journal of Vibration and Control 17.14 (2011) 21992212.

C.Y. Liao, and C.C. Ma. Transient behavior of a cantilever plate subjected to impact loading: Theoretical analysis and experimental measurement. International Journal of Mechanical Sciences 166 (2020) 105217.

D. Li, Z. Zhou, and J. Ou. Dynamic behavior monitoring and damage evaluation for arch bridge suspender using GFRP optical fiber Bragg grating sensors. Optics & Laser Technology 44.4 (2012) 1031-1038.

P. Moyo, J.M.W. Brownjohnb, R. Sureshc, S.C. Tjinc. Development of fiber Bragg grating sensors for monitoring civil infrastructure. Engineering structures 27.12 (2005) 1828-1834.

H.P. Wang, J.G. Dai, and X.Z. Wang. Improved temperature compensation of fiber Bragg grating-based sensors applied to structures under different loading conditions. Optical Fiber Technology 63 (2021) 102506.

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Scientific Books of Abstracts, Vol. 5, pp 22-23

© 2024 The Author(s). Published by Trans Tech Publications Ltd, Switzerland.

Submitted:
2024-06-14

Revised:
2024-06-24

Accepted:
2024-06-27

Online:
2024-08-29

Theoretical Analysis, Numerical Calculation and Experimental Measurement on Transient Wave Propagation of Structure for Multi-Span Plate

Guo-Zhao Dai , Chien-Ching Ma

¹Department of Mechanical and Engineering, National Taiwan University, Taipei 106319, Republic

of China

08522540@ntu.edu.tw, ccma@ntu.edu.tw

Keywords: Multi-span plate; Free vibration; Transient analysis; strain measurement; Damping ratio

Abstract

This paper applies mathematical analysis combined with finite element simulation and experimental measurement techniques to investigate the dynamic behavior of multi-span plate structures. Based on the dynamic characteristics of the structures, the influence of damping is fully investigated by short-time Fourier transform (STFT) [1]. Under the assumption that the decrease of transient signals is all caused by the damping effect, using the Fourier transform in the frequency domain, by combining the theoretical analysis and experimental results, a new method to calculate the damping ratio is presented in this study. In free vibration analysis, From Hamilton's principle, the equation of motion for out-of-plane vibration is derived, classical boundary conditions such as free, clamped, and simply supported boundaries are given, and continuity conditions of multi-span bridge plates are provided [2]. Based on the thin plate assumption, free vibration characteristics including resonant frequencies with associated mode shapes and strain fields of different boundary conditions are obtained by the superposition method. The error of resonant frequencies of the structure calculated by the proposed method and FEM software (COMSOL) is less than . The mode shapes, and strain field in different directions have great consistency with the superposition method and numerical calculation. Subsequently, the orthogonality of mode shapes of the multi-span bridge plates is found during the analysis of the steady-state solution, by this characteristic of structure, the normal mode expansion is used to investigate the transient response of the multi-span bridge plate [1]. Transient displacement of the structure can be decoupled as the superposition of time function and mode shape according to the normal mode expansion. Moreover, transient strain responses can be also obtained by differentiating the mode shape in different directions, which is widely used in engineering such as ensure the structure's safety and analyze their reactions under sudden changes in loading or environmental conditions. After investigating the steady-state and wave propagation characteristics of the multi-span bridge system by theoretical analysis, experimental transient signal measurement is employed in this study. In transient signal measurement, piezoelectric thin film sensors (PVDF) are chosen to measure the short-time impact history and in-plane transient strain responses under impact force [3,4]. The laser displacement sensor (LSD) and Fontic sensor (FS) are used to measure the transient displacement of the structure. Considering the short time domain, the transient responses measured by experiments, calculated by FEM software, and theoretical analysis are consistent with each other without damping effect. For long-time transient response, the damping ratio and declining trend on each resonant frequency determined through Short-Time Fourier Transform (STFT) aligns closely with the results obtained through the method proposed in this study. The long-time transient responses consist well between theoretical analysis and experimental results considering the damping effect.

References

Dung, C.V.; Sasaki, E., Numerical Simulation of Output Response of PVDF Sensor Attached on a Cantilever Beam Subjected to Impact Loading. Sensors 16(2016), 601.

D. J. Gorman, Free vibration analysis of cantilever plates by the method of superposition, Journal of Sound and Vibration, 49(1976) 453-467.

Liao, C. Y., & Ma, C. C., Transient behavior of a cantilever plate subjected to impact loading: Theoretical analysis and experimental measurement, International Journal of Mechanical Sciences, 166(2019), 105-217.

Y. H. Pao, D. C. Keh, S. M. Howard, Dynamic response and wave propagation in plane trusses and frames. AIAA journal, 37(1990) 594-603.

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Scientific Books of Abstracts, Vol. 5, pp 24-25

© 2024 The Author(s). Published by Trans Tech Publications Ltd, Switzerland.

Submitted:
2024-06-14

Accepted:
2024-06-18

Online:
2024-08-29

Multi-Hazard Analysis of Steel Buildings Subjected to Earthquake and Fire

Niccolò Moroni , Mattia Francioli and Francesco Petrini

Sapienza University of Rome, Rome 00184, Italy

Sapienza University of Rome, Rome 00184, Italy

Sapienza University of Rome, Rome 00184, Italy

Sapienza University of Rome, Rome 00184, Italy

moroni.1739001@studenti.uniroma1.it, mattia.francioli@uniroma1.it, alessandro.guarnieri@uniroma1.it, francesco.petrini@uniroma1.it

*Corresponding author

Keywords: Multi-Hazard, Earthquake, Fire, Steel Structure, Performance.

Abstract

Due to the use of increasingly complex structural systems, natural phenomena becoming more devastating and also to climate change, it is convenient to consider exceptional events, such as Multi-Hazard (MH) scenarios, where interaction between different hazards acting on the structure is possible. The concept of structural design in a MH environment is not immediate: several problems arise, primarily related to the type of interaction between the considered hazards. Usually [1], it is possible to have Concurrent-Independent hazard when neither one triggers or intensifies the other one and they do not correlate in nature (as wind and earthquake), Concurrent-Correlated hazard when the intensities of the hazards are correlated and cannot be considered individually (as wind and sea motion) and Chained hazard when the intensities or the effects of chained hazards are correlated to a main hazard (accidental or natural event triggered by a main event) [2]. The last type of described interaction is the one considered in this work, with earthquake being the main hazard and fire the chained one. Given the complexity of possible scenarios, which can depend on numerous factors, the assumed MH case represents a plausible sequence of events: the considered scenario represents the situation in which an earthquake determines damages to the structure to the extent of causing a fire to break out in one of its compartments (usually where technical installations are located): the fire involves a structure already damaged by the main seismic event; however, it frequently happens that the structure could be affected by minor aftershocks, thus impacting a structure damaged by both hazards (i.e., earthquake and fire). Thus, the study focuses on a rare but realistic situation which can summarized in the following sequence of events: main seismic event - fire triggered by seismic damages. In order to monitor the state of the considered structure (2D steel frame) during various analyses, the chosen software is "Straus7", which allows for modeling geometric and material nonlinearities and ensures the capability to perform thermal analyses. The aim of this work is to develop a clear and comprehensive procedure that allows for the extension of the analysis method introduced in the 1990s by Fajfar and Gaspersic and outlined in EC8 (referred to as the N2 method) [3,4] specifically for the case of MH analysis involving earthquake and fire. The goal is to assess the structural performance at the end of the sequence of considered events. The analyses conducted to assess the behavior of the structure under seismic conditions involve nonlinear static analyses (pushover), aiming to obtain the so-called capacity curve. This curve depicts the base shear versus lateral displacement of a control node, typically positioned at the top of the structure. By appropriately modeling the structure in the software, considering not only elastic but also plastic behavior, it becomes possible to observe the structural response as the plasticization of structural elements progresses. Indeed, the N2 Method represents a straightforward procedure for evaluating structural performance in the case of seismic action. It involves identifying the performance point, which corresponds to the intersection between the demand curve (represented by the demand spectrum in the ADRS plane, associated with the corresponding limit state) and the capacity curve obtained from

References

A.E. Zaghi, J.E. Padgett, M. Bruneau, M. Barbato, Y. Li, J. Mitrani-Reiser, A. McBride, Establishing common nomenclature, characterizing the problem, and identifying future opportunities in multihazard design, J. Struct. Eng. 142 (12) (2016) H2516001.

M. Francioli, F. Petrini, F. Bontempi, Structural robustness analysis of RC frames under seismic and blast chained loads scenarios, Journal of Building Engineering 67 (2023) 105970.

P. Fajfar, P. Gaspersic, The N 2 method for the seismic damage analysis of RC buildings, EARTHQUAKE ENGINEERING AND STRUCTURAL DYNAMICS, VOL. 25, 31-46 (1996).

CEN, European Committee for Standardization, Eurocode 8: Design of structures for earthquake resistance - Part 1: General rules, seismic actions and rules for building. European Standard EN 1998-1-2004, CEN, Brussels, 2004.

A. H. Buchanan, A. Kwabena Abu, Structural design for fire safety, John Wiley & Sons, 2017.

CEN, European Committee for Standardization, Eurocode 3 Design of steel structure - Part 12: General rules, Structural fire design. European Standard EN 1993-1-2, CEN, Brussels, 2005.

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Scientific Books of Abstracts, Vol. 5, pp 26-27

© 2024 The Author(s). Published by Trans Tech Publications Ltd, Switzerland.

Submitted:
2024-06-19

Accepted:
2024-06-19

Online:
2024-08-29

On the Microstructure and Diffusion Transformation of PrecipitationHardened Sterling Silver for Jewelry Application

Pornnapha Denjarukul , Sawitchaya Sinpromma , Adiruj Peerawat , Thanut Jintakosol , Chayankittipat Yongperakul and Kageeporn Wongpreedee

¹Innovation and Industrial Management Program, College of Creative Industry, Srinakharinwirot University, Bangkok, 10110, Thailand

College of Creative Industry, Srinakharinwirot University, Bangkok, 10110, Thailand

Suparno Jewelry Co., Ltd., Ramkhamhaeng Road, Saphan Sung, Bangkok, 10240, Thailand

pornnapha.ars@gmail.com, sawitchaya.spm@gmail.com, adiruj.peerawat@g.swu.ac.th, Thanut@g.swu.ac.th, chayankittipat@gmail.com, kageeporn@g.swu.ac.th

Keywords: Sterling Silver, Precipitations Hardening, Hardness, Jewelry Industry, Commercial uses

Abstract

Sterling silver has copper as a primary alloy, improving hardness. However, it causes a fire strain, which is a red spot microstructure, leading to tarnished problems. The research aims to reduce the amount of copper and develop suitable processes for enhancing hardness properties through three compositions of AgCu and AgCuZnNi systems at various compositions, which are Alloy SA (92.5wt%Ag-7.5wt%Cu), alloy A (93.5wt%Ag-5.01wt%Cu-0.79wt%Zn-0.70wt%Ni), and alloy . The temperatures of , and for multiple durations ranging from 15 minutes to 180 minutes were plotted precipitation hardening of hardness at various times and temperatures. The results showed hardness improvement from to after the heat treatment process, with optimal results achieved for alloy B at a temperature of for one hour. This improved alloy composition can be an alternative because it has less copper but maintains increased strength and durability after the heat treatment. The CIELAB test also confirmed that the properties of alloy B have better tarnish resistance. The composition and manipulated process recipe can be a guideline for producing sterling silver for commercial uses.

References

K. Wongpreedee, Advanced Jewelry Casting Technology. Bangkok: Srinakharinwirot University. (2008)

G. Raykhtsaum, Sterling Silver- U.S. Patent Review, The 28th Santa Fe Symposium on Jewelry Manufacturing Technology. (2014)

S. Praiphruk, G. Lothongkum, E. Nisaratanaporn, and B. Lohwongwatana, Investigation of supersaturated silver alloys for high hardness jewelry application, J. Met. Mater. Miner., vol. 23, no 2. (2013)

S. Sakultanchareonchai, T. Chairuangsri and E. Nisaratanaporn, Microstructure and Mechanical Properties of As-cast and Heat-treated 935 AgCuBeSn Alloys, Chiang Mai J. Sci., vol. 43, 2016, pp. 206-214.

G.E. Gardam, Sterling silver containing alumiuum, Metallurgia., vol. 47(279), 1998, pp. 29-33.

J.T. Strauss, Tarnish-proof sterling: understanding the limitations, The 22nd Santa Fe Symposium on Jewelry Manufacturing Technology., 2008, pp. 307-326.

E. Nisaratanaporn, S. Wongsriruksa, S. Pongsukiwat and G. Lothongkum, Study on the microstructure, mechanical properties, tarnish and corrosion resistance of Sterling silver alloyed with manganese, Materials Sciences and Engineeting A., 2007, pp. 445-446: 663-668.

Y. Qingqing, X. Weihao, Y. Zhen, S. Dingjie and W. Ronghui, Corrosion and tarnish behaviour of 925 Ag 75 Cu and 925Ag40Cu35Zn alloys in synthetic sweat and H2S atmosphere, Rare Met.Mater., vol. 39(4), 2010, pp. 578-581.

M. Grimwade, Heat Treatment of Precious Metals and Their Alloys, The Fifth Santa Fe Symposium on Jewelry Manufacturing Technology. (1991)

B. Lohwongwatana, P. Wirot, C. Yipyintum, A. Khamkongkaeo, C. Puncreobutr, G. Lothongkum, E. Nisaratanaporn and T. E. Vichaidith, Comparative Test for Identification of Silver Tarnishing, Proceeding of the Fifth Santa Fe Symposium on Jewelry Manufacturing Technology. (2015)

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Scientific Books of Abstracts, Vol. 5, pp 28-28

© 2024 The Author(s). Published by Trans Tech Publications Ltd, Switzerland.

Submitted:
2024-07-09

Accepted:
2024-07-12

Online:
2024-08-29

Damage Detection for Truss Bridge Structure Using Xgboost

Quyet Nguyen-Huu , Hoa Tran-Ngoc , Lan Nguyen-Ngoc , and Thanh Bui-Tien

¹DX Laboratory, The University of Transportation and Communications Limited Company (UCT., LTD), Vietnam

Faculty of Civil Engineering, University of Transport and Communications, Vietnam

Soete Laboratory, Faculty of Engineering and Architecture, Ghent University, Belgium

quyet.official@outlook.com, ngochoa@utc.edu.vn, ngoclan.nguyen@ugent.be, dbtthanh@utc.edu.vn

*Corresponding author: ngochoa@utc.edu.vn

Keywords: structural health monitoring, truss bridge structure, ensemble learning, eXtreme Gradient Boosting (XGBoost).

Abstract

Structural health monitoring (SHM) is a burgeoning area of interest among modern research endeavors, motivated by the application of state-of-the-art machine learning models. During the last few years, many researchers have proposed techniques for the analysis of SHM datasets, particularly those corresponding to sequence data collected from sensors. Following the flow of this research, in this work, we introduce an effective approach utilizing eXtreme Gradient Boosting (XGBoost), a potent ensemble learning framework rooted in gradient boosting for damage detection. A dataset of damage cases from the Nam O bridge, a steel truss bridge for railways, is applied to assess damages. To evaluate the effectiveness of the method used, common DL models such as OneDimensional Convolutional Neural Network (1DCNN) and Long Short-Term Memory (LSTM) are also considered. Moreover, the influence of the boosting round on the overall result will be analyzed. The results from the validation set and the test set both illustrate that XGBoost performs better in accuracy than 1DCNN and LSTM.

The original version of this eBook is available on https://www.scientific.net/book/book-of-abstracts-presented-at-the-7th-international-conference-on-numerical-modelling-in-engineering-nme-2024/978-3-0364-1473-7

Scientific Books of Abstracts, Vol. 5, pp 29-29

© 2024 The Author(s). Published by Trans Tech Publications Ltd, Switzerland.

Submitted:
2024-07-28

Accepted:
2024-07-29

Online:
2024-08-29

A Computational Fluid Dynamics Model for Tornado Wind Turbine

Omar S. Abdelfatah , Yehia A. Eldrainy , Ali I. Shehata and Ahmed S. Shehata

¹Mechanical Engineering Department, Faculty of Engineering, Pharos University, Alexandria, Egypt

Mechanical Engineering Department, Faculty of Engineering, Alexandria University, Alexandria, Egypt

Mechanical Engineering Department, College of Engineering and Technology, Arab Academy for Science, Technology and Maritime Transport, Alexandria, Egypt

Marine Engineering Department, College of Engineering and Technology, Arab Academy for Science Technology and Maritime Transport, Alexandria, P.O. Box 1029, Egypt

osamy624@yahoo.com, yeldrainy@adj.aast.edu, aliismail@aast.edu, a_samir@aast.edu

Keywords: Tornado wind turbine, Vertical-axis wind turbine, Model performance, CFD

Abstract

The increasing demand for clean and renewable energy has led researchers to focus on the development of vertical-axis wind turbines. One notable configuration was the Tornado wind turbine, which incorporates a novel blade configuration able to enhance aerodynamic efficiency and reduce negative torque. Therefore, this paper aims to compare the flow field and performance of the tornado wind turbine with those of Savonius, Darrieus, and hybrid wind turbines at different tip speed ratios. A two-dimensional, incompressible, turbulent, and unsteady flow model was created with the computational fluid dynamics software ANSYS Fluent 21 and verified through the study of grid independence. Additionally, validated the model by comparing its results with those of the TN-2000 VW4, finding a good agreement between them. The results showed the tornado model achieved a higher power coefficient than the Hybrid Wind Turbine by and the Savonius by . These findings point to the Tornado model's potential as a remarkably effective way to improve vertical-axis wind turbine efficiency.

The original version of this eBook is available on https://www.scientific.net/book/book-of-abstracts-presented-at-the-7th-international-conference-on-numerical-modelling-in-engineering-nme-2024/978-3-0364-1473-7

Scientific Books of Abstracts, Vol. 5, pp 30-30

© 2024 The Author(s). Published by Trans Tech Publications Ltd, Switzerland.

Accepted:
2024-08-13

Online:
2024-08-29

On the Question of Applying One Creep Model with a Real Structural Parameter in the Mechanics of Deformable Solids

Rafael Shaikhutdinov

Ufa University of Science and Technology, Russian Federation, shaykhutdinovri@gmail.com

Keywords: constitutive equations, creep in metals, creep accounting in solid mechanics, phenomenological and structural approach, steady state creep, transient creep

Abstract

Creep in metals as a phenomenon has been comprehensively studied in the solid mechanics as well as in materials science due to the constant need of assessment the strength characteristics of loaded parts that work for a long time at elevated temperatures on the one hand and improving knowledge about the plastic deformation mechanisms on the other. As known, the mechanics of deformable solids uses constitutive equations when describing creep behavior, while in strength physics, there are models that are used to quantitatively describe the mechanism of creep deformations in new materials and to predict performance of the parts manufactured from them. However, it is not often possible to encounter latter models when solving mechanics problems. In this paper it is shown how some classic boundary value problems can be accompanied with the kinetic equation of a metal creep model with a real structural parameter that is taken from the theory of irreversible deformations and solved numerically. The results of the solution are provided for steady and transient creep conditions and the actual structural parameter distribution are shown. The prospects for the use of structural parameters predicting the dynamics of changing material properties in processes where it's worth to count creep deformations are outlined. The results of this work open the door for the successful incorporation different structural creep models of material science kind into the mechanics of deformable solids.

The original version of this eBook is available on https://www.scientific.net/book/book-of-abstracts-presented-at-the-7th-international-conference-on-numerical-modelling-in-engineering-nme-2024/978-3-0364-1473-7

Scientific Books of Abstracts, Vol. 5, pp 31-31

© 2024 The Author(s). Published by Trans Tech Publications Ltd, Switzerland.

Accepted:
2024-08-13

Online:
2024-08-29

Scattering of Flexural Wave in a Thin Plate with Multiple Circular Inclusions by Using Indirect BIEM and Addition Theorem

Wei-Ming Lee

Department of Aviation Mechanical Engineering, China University of Science and Technology, Hsinchu, Taiwan

wmlee@cc.cust.edu.tw

Keywords: indirect boundary integral equation, addition theorem, scattering, flexural wave, thin plate, coated inclusion, dynamic moment concentration factor, the far-filed scattering pattern

Abstract

This paper presents the indirect boundary integral equation method combined with the addition theorem to solve analytically the multiple scattering of flexural waves in an infinite thin plate with multiple circular inclusions/coated inclusions subjected to an incident plane wave. Owing to the addition theorem, we can avoid computing principal values in the boundary integral formulation. The computation of higher-order derivatives regarding a non-local coordinate system can be done by transforming the expression of the displacement field for an infinite thin plate to a specified local coordinate system, where the continuity conditions around the inclusion are given. The proposed formulation not only makes the overall numerical results more accurate but also has no fictitious frequency that appears in the traditional boundary integral method. In this work, the near-field dynamic moment concentration factor (DMCF) around the inclusions/coated inclusions and the farfield scattering pattern are theoretically derived and numerically calculated. The former often causes fatigue failure and affects the load-carrying capacity. The latter is related to non-destructive inspection. According to the continuity conditions around the circular inclusion, an infinite series solution is obtained as an analytical model of multiple scattering of flexural waves in an infinite thin plate with multiple circular inclusions/coated inclusions. We first perform the convergence analysis of the proposed method in this work. Although no limit is imposed on the number of circular inclusions/coated inclusions in our proposed method, the numerical results considering four circular inclusions/coated inclusions are presented, and related phenomena are studied. The effects of the wave number and the angle of the incident wave, the thickness of the flexible inclusion and the separation of inclusions on the near-field DMCF and the far-field scattering pattern are comprehensively investigated.

References

W.M. Lee, J.T. Chen, Free vibration analysis of a circular plate with multiple circular holes by using addition theorem and indirect BIEM, J. Appl. Mech.-Trans. ASME. 78(1) (2011) 011015-1-011015-10

W.M. Lee, J.T. Chen, Scattering of flexural wave in a thin plate with multiple circular inclusions by using null-field integral equation approach, J. Sound Vibr. 329(8) (2010) 1042-1061.

W.M. Lee, J.T. Chen, Scattering of flexural wave in a thin plate with multiple circular inclusions by using the multipole method, Int. J. Mech. Sci. 53(8) (2011) 617-627.

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Keywords Index

#

1d Convolution Neural Networks Mitigation of Noise and Other Variations in Vibration Responses for Damage Characterization for Damage Detection in Composites

A

Addition Theorem Scattering of Flexural Wave in a Thin Plate with Multiple Circular Inclusions by Using Indirect BIEM and Addition Theorem

Ameliorated Golden Jackal Optimizer (agjo) Enhanced ANN Predictive Model of Porous Sandwich Functionally Graded Plates Reinforced with Graphene Nanoplatelets Using Isogeometric Analysis

Artificial Neural Network (ann) Enhanced ANN Predictive Model of Porous Sandwich Functionally Graded Plates Reinforced with Graphene Nanoplatelets Using Isogeometric Analysis

Auxetic Honeycomb Core Isogeometric Vibration Analysis of Auxetic Honeycomb Sandwich Plates

B

Bridge Damage Identification Damage Identification in Bridge Structure Using Long Short-Term Memory Networks

C

CFD A Computational Fluid Dynamics Model for Tornado Wind Turbine

Coated Inclusion Scattering of Flexural Wave in a Thin Plate with Multiple Circular Inclusions by Using Indirect BIEM and Addition Theorem

Commercial Uses On the Microstructure and Diffusion Transformation of PrecipitationHardened Sterling Silver for Jewelry Application

Constitutive Equations On the Question of Applying One Creep Model with a Real Structural Parameter in the Mechanics of Deformable Solids

Contact Angle Tribological and Residual Mechanical Properties of Hoisting Wire Rope in Different Contact States

Contact Stress Revealing the Effect of Contact Stress on the Fretting Fatigue Life: From the Perspective OF Crack Propagation

Convolution Neural Networks Mitigation of Noise and Other Variations in Vibration Responses for Damage Characterization for Damage Detection in Composites

Corrosion Numerical Modeling of Fretting Wear Considering the Effect of Corrosion

Crack Closure Effect Revealing the Effect of Contact Stress on the Fretting Fatigue Life: From the Perspective OF Crack Propagation

Crack Initiation; Crack Propagation; Linear Elastic Fracture Mechanics Numerical Analysis of the Effect of FGM Coatings on Fretting Fatigue Behavior

Creep Accounting In Solid Mechanics On the Question of Applying One Creep Model with a Real Structural Parameter in the Mechanics of Deformable Solids

Creep In Metals On the Question of Applying One Creep Model with a Real Structural Parameter in the Mechanics of Deformable Solids

D

Dam Sites Predicting Initial In Situ Stresses in Dam Sites Using an Advanced Meta Model

Deep Drawing Finite Element Modelling of Cup Drawing Process

Different Environment Tribological and Residual Mechanical Properties of Hoisting Wire Rope in Different Contact States

Dynamic Characteristics Utilizing Fiber Optic Gratings to Investigate the Dynamic Characteristics of Structures under Thermal Processes

Dynamic Moment Concentration Factor Scattering of Flexural Wave in a Thin Plate with Multiple Circular Inclusions by Using Indirect BIEM and Addition Theorem

E

Earthquake Multi-Hazard Analysis of Steel Buildings Subjected to Earthquake and Fire

Ensemble Learning Damage Detection for Truss Bridge Structure Using Xgboost

Extreme Gradient Boosting (xgboost) Damage Detection for Truss Bridge Structure Using Xgboost

F

Fe Simulation Numerical Modeling of Fretting Wear Considering the Effect of Corrosion

Fiber Optic Grating Utilizing Fiber Optic Gratings to Investigate the Dynamic Characteristics of Structures under Thermal Processes

Finite Difference Method Finite Element Modelling of Cup Drawing Process

Finite Element Method Revealing the Effect of Contact Stress on the Fretting Fatigue Life: From the Perspective OF Crack Propagation

Fire Multi-Hazard Analysis of Steel Buildings Subjected to Earthquake and Fire

First Nature Frequency Enhanced ANN Predictive Model of Porous Sandwich Functionally Graded Plates Reinforced with Graphene Nanoplatelets Using Isogeometric Analysis

Flexural Wave Scattering of Flexural Wave in a Thin Plate with Multiple Circular Inclusions by Using Indirect BIEM and Addition Theorem

Flow Forming; Metal Forming; Finite Element Method; Plasticity Numerical Investigation to Predict the Geometrical and Mechanical Properties of a Flow-Formed Workpiece Using 1.7220 Steel

Fretting Numerical Modeling of Fretting Wear Considering the Effect of Corrosion

Fretting Fatigue Revealing the Effect of Contact Stress on the Fretting Fatigue Life: From the Perspective OF Crack Propagation

Fretting Fatigue; Elevated Temperature; Numerical Modelling Numerical Modelling of Fretting Fatigue Behavior at Elevated Temperatures

Fretting Fatigue; Fgm Coating; Damage Parameter Numerical Analysis of the Effect of FGM Coatings on Fretting Fatigue Behavior

Fretting Wear; Finite Element Method (fem); High Temperature; Oxidized Layer Numerical Modelling of Fretting Damage Considering Oxidized Layer at High Temperatures

Functionally Graded Adhesive Joints; Finite Element Method; Stress Analysis Modelling of Single Lap Functionally Graded Adhesively Bonded Joint Using Finite Element Analysis

H

Hardness On the Microstructure and Diffusion Transformation of PrecipitationHardened Sterling Silver for Jewelry Application

High Accuracy A Radial Basis Function Collocation Method for the High-Order Korteweg-De Vries Equations

I

In-situ Stresses Predicting Initial In Situ Stresses in Dam Sites Using an Advanced Meta Model

Indirect Boundary Integral Equation Scattering of Flexural Wave in a Thin Plate with Multiple Circular Inclusions by Using Indirect BIEM and Addition Theorem

Isogeometric Analysis Isogeometric Vibration Analysis of Auxetic Honeycomb Sandwich Plates

Isogeometric Analysis (iga) Enhanced ANN Predictive Model of Porous Sandwich Functionally Graded Plates Reinforced with Graphene Nanoplatelets Using Isogeometric Analysis

J

Jewelry Industry On the Microstructure and Diffusion Transformation of PrecipitationHardened Sterling Silver for Jewelry Application

K

Kdv Equations A Radial Basis Function Collocation Method for the High-Order Korteweg-De Vries Equations

L

Long Shortterm Memory Damage Identification in Bridge Structure Using Long Short-Term Memory Networks

M

Model Performance A Computational Fluid Dynamics Model for Tornado Wind Turbine

Multi-hazard Multi-Hazard Analysis of Steel Buildings Subjected to Earthquake and Fire

Multi-span Plate; Free Vibration; Transient Analysis; Strain Measurement; Damping Ratio Theoretical Analysis, Numerical Calculation and Experimental Measurement on Transient Wave Propagation of Structure for Multi-Span Plate

Multiple Linear Regression Models Predicting Initial In Situ Stresses in Dam Sites Using an Advanced Meta Model

N

Negative Poisson's Ratio Isogeometric Vibration Analysis of Auxetic Honeycomb Sandwich Plates

O

Optimization Isogeometric Vibration Analysis of Auxetic Honeycomb Sandwich Plates

P

Parameter Sensitivity Analysis Predicting Initial In Situ Stresses in Dam Sites Using an Advanced Meta Model

Performance Multi-Hazard Analysis of Steel Buildings Subjected to Earthquake and Fire

Phenomenological And Structural Approach On the Question of Applying One Creep Model with a Real Structural Parameter in the Mechanics of Deformable Solids

Polynomial Chaos Kriging Model Predicting Initial In Situ Stresses in Dam Sites Using an Advanced Meta Model

Precipitations Hardening On the Microstructure and Diffusion Transformation of PrecipitationHardened Sterling Silver for Jewelry Application

R

Radial Basis Collocation Method A Radial Basis Function Collocation Method for the High-Order Korteweg-De Vries Equations

Real-time Damage Detection Mitigation of Noise and Other Variations in Vibration Responses for Damage Characterization for Damage Detection in Composites

Residual Mechanical Properties Tribological and Residual Mechanical Properties of Hoisting Wire Rope in Different Contact States

S

Sandwich Functionally Graded Plates Enhanced ANN Predictive Model of Porous Sandwich Functionally Graded Plates Reinforced with Graphene Nanoplatelets Using Isogeometric Analysis

Sandwich Nanoplates Isogeometric Vibration Analysis of Auxetic Honeycomb Sandwich Plates

Scattering Scattering of Flexural Wave in a Thin Plate with Multiple Circular Inclusions by Using Indirect BIEM and Addition Theorem

Steady State Creep On the Question of Applying One Creep Model with a Real Structural Parameter in the Mechanics of Deformable Solids

Steel Structure Multi-Hazard Analysis of Steel Buildings Subjected to Earthquake and Fire

Sterling Silver On the Microstructure and Diffusion Transformation of PrecipitationHardened Sterling Silver for Jewelry Application

Structural Health Monitoring Mitigation of Noise and Other Variations in Vibration Responses for Damage Characterization for Damage Detection in Composites; Damage Identification in Bridge Structure Using Long Short-Term Memory Networks; Damage Detection for Truss Bridge Structure Using Xgboost

Super-convergence A Radial Basis Function Collocation Method for the High-Order Korteweg-De Vries Equations

T

The Far-filed Scattering Pattern Scattering of Flexural Wave in a Thin Plate with Multiple Circular Inclusions by Using Indirect BIEM and Addition Theorem

Thermal Behavior Utilizing Fiber Optic Gratings to Investigate the Dynamic Characteristics of Structures under Thermal Processes

Thin Plate Scattering of Flexural Wave in a Thin Plate with Multiple Circular Inclusions by Using Indirect BIEM and Addition Theorem

Times-series Data Damage Identification in Bridge Structure Using Long Short-Term Memory Networks

Tornado Wind Turbine A Computational Fluid Dynamics Model for Tornado Wind Turbine

Transient Creep On the Question of Applying One Creep Model with a Real Structural Parameter in the Mechanics of Deformable Solids

Tribological Properties Tribological and Residual Mechanical Properties of Hoisting Wire Rope in Different Contact States

Truss Bridge Structure Damage Detection for Truss Bridge Structure Using Xgboost

V

Vertical-axis Wind Turbine A Computational Fluid Dynamics Model for Tornado Wind Turbine

W

Wear Numerical Modeling of Fretting Wear Considering the Effect of Corrosion

Wire Rope Tribological and Residual Mechanical Properties of Hoisting Wire Rope in Different Contact States

Authors Index

A

Abdelfatah, O. A Computational Fluid Dynamics Model for Tornado Wind Turbine

Ahmed, B. Numerical Modelling of Fretting Fatigue Behavior at Elevated Temperatures

B

Bai, J. Enhanced ANN Predictive Model of Porous Sandwich Functionally Graded Plates Reinforced with Graphene Nanoplatelets Using Isogeometric Analysis

Bao-Lam, N. Damage Identification in Bridge Structure Using Long Short-Term Memory Networks

C

Cao, M. Predicting Initial In Situ Stresses in Dam Sites Using an Advanced Meta Model

D

Dai, G. Theoretical Analysis, Numerical Calculation and Experimental Measurement on Transient Wave Propagation of Structure for Multi-Span Plate

Denjarukul, P. On the Microstructure and Diffusion Transformation of PrecipitationHardened Sterling Silver for Jewelry Application

E

Eldrainy, Y. A Computational Fluid Dynamics Model for Tornado Wind Turbine

F

Fan, K. Revealing the Effect of Contact Stress on the Fretting Fatigue Life: From the Perspective OF Crack Propagation

Francioli, M. Multi-Hazard Analysis of Steel Buildings Subjected to Earthquake and Fire

G

Guarnieri, A. Multi-Hazard Analysis of Steel Buildings Subjected to Earthquake and Fire

Guo, Y. Finite Element Modelling of Cup Drawing Process

H

Hamid, U. Isogeometric Vibration Analysis of Auxetic Honeycomb Sandwich Plates

Hoa, T. Damage Detection for Truss Bridge Structure Using Xgboost

I

Imran, M. Numerical Modeling of Fretting Wear Considering the Effect of Corrosion

J

Jintakosol, T. On the Microstructure and Diffusion Transformation of PrecipitationHardened Sterling Silver for Jewelry Application

K

Kocabıçak, A. Numerical Investigation to Predict the Geometrical and Mechanical Properties of a Flow-Formed Workpiece Using 1.7220 Steel

L

Lee, W. Scattering of Flexural Wave in a Thin Plate with Multiple Circular Inclusions by Using Indirect BIEM and Addition Theorem

Li, C. Numerical Modelling of Fretting Damage Considering Oxidized Layer at High Temperatures

Li, Y. Predicting Initial In Situ Stresses in Dam Sites Using an Advanced Meta Model

Lin, J. Utilizing Fiber Optic Gratings to Investigate the Dynamic Characteristics of Structures under Thermal Processes

Liu, D. Revealing the Effect of Contact Stress on the Fretting Fatigue Life: From the Perspective OF Crack Propagation

M

Ma, C. Utilizing Fiber Optic Gratings to Investigate the Dynamic Characteristics of Structures under Thermal Processes; Theoretical Analysis, Numerical Calculation and Experimental Measurement on Transient Wave Propagation of Structure for Multi-Span Plate

Moroni, N. Multi-Hazard Analysis of Steel Buildings Subjected to Earthquake and Fire

N

Nguyen, N. Damage Identification in Bridge Structure Using Long Short-Term Memory Networks; Damage Detection for Truss Bridge Structure Using Xgboost

P

Peerawat, A. On the Microstructure and Diffusion Transformation of PrecipitationHardened Sterling Silver for Jewelry Application

Peng, Y. Tribological and Residual Mechanical Properties of Hoisting Wire Rope in Different Contact States

Petrini, F. Multi-Hazard Analysis of Steel Buildings Subjected to Earthquake and Fire

Q

Quyet, N. Damage Identification in Bridge Structure Using Long Short-Term Memory Networks; Damage Detection for Truss Bridge Structure Using Xgboost

S

Shaikhutdinov, R. On the Question of Applying One Creep Model with a Real Structural Parameter in the Mechanics of Deformable Solids

Shehata, A. A Computational Fluid Dynamics Model for Tornado Wind Turbine

Shirazi, M. Mitigation of Noise and Other Variations in Vibration Responses for Damage Characterization for Damage Detection in Composites

Sinpromma, S. On the Microstructure and Diffusion Transformation of PrecipitationHardened Sterling Silver for Jewelry Application

T

Thanh, B. Damage Identification in Bridge Structure Using Long Short-Term Memory Networks; Damage Detection for Truss Bridge Structure Using Xgboost

W

Wahab, M. Numerical Analysis of the Effect of FGM Coatings on Fretting Fatigue Behavior; Numerical Investigation to Predict the Geometrical and Mechanical Properties of a Flow-Formed Workpiece Using 1.7220 Steel; Numerical Modeling of Fretting Wear Considering the Effect of Corrosion; Mitigation of Noise and Other Variations in Vibration Responses for Damage Characterization for Damage Detection in Composites; Predicting Initial In Situ Stresses in Dam Sites Using an Advanced Meta Model; Damage Identification in Bridge Structure Using Long Short-Term Memory Networks; Isogeometric Vibration Analysis of Auxetic Honeycomb Sandwich Plates; Numerical Modelling of Fretting Fatigue Behavior at Elevated Temperatures; Tribological and Residual Mechanical Properties of Hoisting Wire Rope in Different Contact States; A Radial Basis Function Collocation Method for the High-Order Korteweg-De Vries Equations; Enhanced ANN Predictive Model of Porous Sandwich Functionally Graded Plates Reinforced with Graphene Nanoplatelets Using Isogeometric Analysis; Numerical Modelling of Fretting Damage Considering Oxidized Layer at High Temperatures; Finite Element Modelling of Cup Drawing Process; Revealing the Effect of Contact Stress on the Fretting Fatigue Life: From the Perspective OF Crack Propagation; Modelling of Single Lap Functionally Graded Adhesively Bonded Joint Using Finite Element Analysis

Wang, C. Numerical Analysis of the Effect of FGM Coatings on Fretting Fatigue Behavior; Numerical Modelling of Fretting Fatigue Behavior at Elevated Temperatures; Revealing the Effect of Contact Stress on the Fretting Fatigue Life: From the Perspective OF Crack Propagation

Wang, G. Tribological and Residual Mechanical Properties of Hoisting Wire Rope in Different Contact States

Wang, L. A Radial Basis Function Collocation Method for the High-Order Korteweg-De Vries Equations

Wongpreedee, K. On the Microstructure and Diffusion Transformation of PrecipitationHardened Sterling Silver for Jewelry Application

X

Xue, Z. A Radial Basis Function Collocation Method for the High-Order Korteweg-De Vries Equations

Y

Yongperakul, C. On the Microstructure and Diffusion Transformation of PrecipitationHardened Sterling Silver for Jewelry Application

Z

Zhang, Y. Modelling of Single Lap Functionally Graded Adhesively Bonded Joint Using Finite Element Analysis