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Online since: February 2013
Authors: Miroslav Gombár, Ján Kmec, Peter Michal, Alena Vagaská
The most common aim of experiments it is determine how certain factors affect the observed variable, often called the response.
Generally speaking, the resulting coating microhardness is affected by mainly physical factors accompanied by a chemical influence in their mutual relations.
It is also clear from the Fig. 3 that the temperature of the electrolyte alone does not affect the observed parameter, but its importance is in interaction with other factors.
Apart from corrosion resistance and thermal insulation properties improvement, surface microhardness increases, too.
Fecsu, Analysis of selected properties of PVD films, Scientific Bulletins of Rzeszów University of Technology.
Generally speaking, the resulting coating microhardness is affected by mainly physical factors accompanied by a chemical influence in their mutual relations.
It is also clear from the Fig. 3 that the temperature of the electrolyte alone does not affect the observed parameter, but its importance is in interaction with other factors.
Apart from corrosion resistance and thermal insulation properties improvement, surface microhardness increases, too.
Fecsu, Analysis of selected properties of PVD films, Scientific Bulletins of Rzeszów University of Technology.
Online since: January 2017
Authors: Xin Yi Jin, Qiao Zhen Yu, Cai Wei He, Xin Ran Liu, Xue Jiao Yan
By scanning electron microscopy (SEM), single fiber strength tester, the morphologies and mechanical properties of the composite films were researched; the influence of the mass fraction of NCWs on the mechanical property of lignin fibrous film was studied.
The quality of precursor is the key factor affecting the quality of carbon fiber.
This study focused on the research of the effect of NCW content on the microstructure and mechanical property of lignin fibrous film to obtain high quality carbon fiber precursor.
Strips measuring 25 mm × 2.0 mm × 0.53 mm were glued on a paper frame and then mounted on Instron tester and average tensile properties from 10 samples were measured.
a b c d e Fig. 1 SEM images of composite fibrous films with different contents of NCWs (a) 0.0%; (b) 0.3%; (c) 0.5%; (d) 0.8%; (e) 5.0% Mechanical properties.
The quality of precursor is the key factor affecting the quality of carbon fiber.
This study focused on the research of the effect of NCW content on the microstructure and mechanical property of lignin fibrous film to obtain high quality carbon fiber precursor.
Strips measuring 25 mm × 2.0 mm × 0.53 mm were glued on a paper frame and then mounted on Instron tester and average tensile properties from 10 samples were measured.
a b c d e Fig. 1 SEM images of composite fibrous films with different contents of NCWs (a) 0.0%; (b) 0.3%; (c) 0.5%; (d) 0.8%; (e) 5.0% Mechanical properties.
Online since: September 2013
Authors: Jiu Yin Pang, Yan Zhao, Zhen Guo Gao
This chapter will be divided into two parts to discuss the above factors affect the performance of plate.
Respectively is: (1)Sizing amount impact on basic properties of the plate (2)Ratio of API adhesive effect on basic properties of the plate Both parts of the test using single factor method.
The basic properties of the sizing amount on board On the basis of the traditional hot pressing process change the sizing amount, discusses the mechanical properties of plate.
Is this part of the test table 1-1 mechanical properties data summary.
Table 1-2 is a summary of the mechanical properties of this part of the test data.
Respectively is: (1)Sizing amount impact on basic properties of the plate (2)Ratio of API adhesive effect on basic properties of the plate Both parts of the test using single factor method.
The basic properties of the sizing amount on board On the basis of the traditional hot pressing process change the sizing amount, discusses the mechanical properties of plate.
Is this part of the test table 1-1 mechanical properties data summary.
Table 1-2 is a summary of the mechanical properties of this part of the test data.
Online since: December 2022
Authors: Hadeel I. Kadhim, Awham M. Hameed, Besma M. Fahad
The Physical-Mechanical Properties in Aggressive Media of Epoxy Composite Reinforced with Waste Glass Materials
Hadeel I.
Mechanical Properties The mechanical qualities of a material are those that influence how it responds to a load.
Effect of Silica Powder Addition on Mechanical Properties of Polymer Laminate Composite.
Effect of glass addition and heat treatment on mechanical properties and wear rate of aluminum-2% graphite."
Abbas, Study of the thermal effect on the mechanical properties of a hybrid composite, vol. 1. (2007).
Mechanical Properties The mechanical qualities of a material are those that influence how it responds to a load.
Effect of Silica Powder Addition on Mechanical Properties of Polymer Laminate Composite.
Effect of glass addition and heat treatment on mechanical properties and wear rate of aluminum-2% graphite."
Abbas, Study of the thermal effect on the mechanical properties of a hybrid composite, vol. 1. (2007).
Online since: November 2012
Authors: Badrinath Veluri, Henrik Myhre Jensen
The developed numerical approach for the calculation of fracture mechanical properties has been validated with three-dimensional models for varying crack front shapes.
In the current investigations, a 2-D finite element iterative method has been developed to analyze the critical stress intensity factors locally along the crack front.
The mode dependent fracture criterion applied in the present investigation was formulated in [3] as (3) The stress intensity factors (SIF's) and varies along the crack front, andare factors that range between 0 and 1 adjusting the relative contribution of Modes II and III to the fracture criterion.
The corresponding stress intensity factors of the three modes given by the following equations (5) Comparison of 2-D and 3-D Model A comparison study between a full 3-D and 2-D numerical calculation of energy release rate and stress intensity factors were presented for straight-sided triangular crack front configuration.
Comparison of stress intensity factors estimated from 2-D and 3-D FEM models for straight-sided crack front for a crack length to thickness of the film ratio.
In the current investigations, a 2-D finite element iterative method has been developed to analyze the critical stress intensity factors locally along the crack front.
The mode dependent fracture criterion applied in the present investigation was formulated in [3] as (3) The stress intensity factors (SIF's) and varies along the crack front, andare factors that range between 0 and 1 adjusting the relative contribution of Modes II and III to the fracture criterion.
The corresponding stress intensity factors of the three modes given by the following equations (5) Comparison of 2-D and 3-D Model A comparison study between a full 3-D and 2-D numerical calculation of energy release rate and stress intensity factors were presented for straight-sided triangular crack front configuration.
Comparison of stress intensity factors estimated from 2-D and 3-D FEM models for straight-sided crack front for a crack length to thickness of the film ratio.
Online since: January 2020
Authors: Mohd Danial Ibrahim, Ger Lian Tan, Lidyana Roslan, Jasmine Jendia, Yuki Kashiwabara, Yuta Sunami
Casting defects due to inappropriate mold design will affect mechanical properties, surface quality and product life cycle.
Casting Defects Casting defects reduce mechanical properties and surface quality of product, hence declining factory productivity.
Casting Defect Factors.
Casting Defect on Mechanical Properties.
The damages are identified such as defective surface quality, faulty component and deficient mechanical properties.
Casting Defects Casting defects reduce mechanical properties and surface quality of product, hence declining factory productivity.
Casting Defect Factors.
Casting Defect on Mechanical Properties.
The damages are identified such as defective surface quality, faulty component and deficient mechanical properties.
Online since: September 2016
Authors: Milind Havanur, A Arockia Selvakumar
The properties of grease vary which depend on environmental conditions.
In this paper the modeling of grease dispensing process using artificial intelligence method, fuzzy logic to optimize the flow of grease by considering the factors affecting the flow of grease and usage of automated system for grease dispensing process.
Flow of grease is affected by 2 factors slip at the boundary and fracture of sample.
Grease with different composition and its effect on friction properties of grease in its flow is conducted using experimental set up.
This variation in properties affects the output quantity of grease discharged.
In this paper the modeling of grease dispensing process using artificial intelligence method, fuzzy logic to optimize the flow of grease by considering the factors affecting the flow of grease and usage of automated system for grease dispensing process.
Flow of grease is affected by 2 factors slip at the boundary and fracture of sample.
Grease with different composition and its effect on friction properties of grease in its flow is conducted using experimental set up.
This variation in properties affects the output quantity of grease discharged.
Online since: June 2014
Authors: Liga Berzina-Cimdina, Janis Locs, Vitalijs Lakevičs, Zilgma Irbe, Kristine Salma-Ancane, Liga Stipniece
Essential factors that influence the production of HAp biomaterials are the synthesis method and properties of starting powder.
At the best of our knowledge, the effect of starting material properties on microstructural properties of a porous HAp bioceramics has not been studied.
However, the different microstructures of HAp bioceramics may significantly influence mechanical properties of materials.
It is necessary to investigate the morphology and composition of the starting materials to determine the exact combination of all technological factors needed to obtain high quality hydroxyapatite bioceramics with desirable characteristics.
Liccuilli, Influence of the calcination temperature on morphological and mechanical properties of highly porous hydroxyapatite scaffolds, Ceram.
At the best of our knowledge, the effect of starting material properties on microstructural properties of a porous HAp bioceramics has not been studied.
However, the different microstructures of HAp bioceramics may significantly influence mechanical properties of materials.
It is necessary to investigate the morphology and composition of the starting materials to determine the exact combination of all technological factors needed to obtain high quality hydroxyapatite bioceramics with desirable characteristics.
Liccuilli, Influence of the calcination temperature on morphological and mechanical properties of highly porous hydroxyapatite scaffolds, Ceram.
Online since: November 2011
Authors: Mohamad Kazem Besharati Givi, Amir Mostafapour Asl, Saeed Mahmoodi Darani, Arash Aghagol
Influences of Tool Pin Profile on Microstructure and Mechanical Properties of Al/Cu Composites Fabricated Via Friction Stir Processing
Amir Mostafapour1, a, Saeed Mahmoodi Darani1, b,
Mohamad Kazem Besharati Givi2, c and Arash Aghagol2, d
1Mechanical Engineering Department, University of Tabriz, Tabriz, Iran
2Mechanical Engineering Department, College of engineering, University of Tehran, Tehran, Iran
aa-mostafapur@tabrizu.ac.ir, bmahmodidarani@gmail.com, cbgivi@ut.ac.ir, da.aghagol@ut.ac.ir
Keywords: Friction Stir Processing, Al/Cu Composite, Microstructure, Tensile Properties, Microhardness
Abstract.
Longitudinal specimens in the direction of FSP lines were cut as per the ASTM E8M to investigate tensile properties of metal matrix composites and were compared to tensile properties of the base metal.
Tensile properties.
Good dispersion of the Cu particles and finer grains in the samples produced by the SQ tool are the factors that increase the strength of these composites.
Application of further FSP passes on the samples eliminates the clustered Cu particles and creates a more homogenous microstructure with finer grains that these advantages improve the mechanical properties of the composites.
Longitudinal specimens in the direction of FSP lines were cut as per the ASTM E8M to investigate tensile properties of metal matrix composites and were compared to tensile properties of the base metal.
Tensile properties.
Good dispersion of the Cu particles and finer grains in the samples produced by the SQ tool are the factors that increase the strength of these composites.
Application of further FSP passes on the samples eliminates the clustered Cu particles and creates a more homogenous microstructure with finer grains that these advantages improve the mechanical properties of the composites.
Online since: May 2012
Authors: Sheng Ji Jin, Zhe Shu, Da Sheng Zhang, Zi Xin Liu
shengjijin@sina.com
Key words: Tunnel Group; Excavation; Mechanical Properties; Numerical Simulation
Abstract: In order to analyze the different construction program under the tunnel surrounding rock stress, strain and plastic zone changes, we take water tunnel group of nuclear power plant as basic project and the application of software FLACIS3D numerical simulation.The results show that: During the tunnel excavation and support group process, the different rock tunnel construction program can produce different stress, displacement and plastic zone extended range of distribution and other aspects.To interval-type excavation program,although previously disturbing effect of the excavation of the tunnel construction and tunnel excavation of rock, it can generate less impact on the stability of surrounding rock.
Tab.1 Parameters values of materials mechanical Rock parameters Strongly weathered granite Moderately weathered granite Breezely weathered granite Strongly weathered Gneiss Moderately weathered Gneiss γ KN/m3 23.3 25.0 25.8 23.0 24.5 C(KPa) 60 400 1300 45 300 φ (°) 27 32 45 24 30 E (GPa) 2.50 8.00 15.80 1.50 4.00 µ 0.38 0.29 0.25 0.40 0.33 Tab.2 Concrete parameter values parameters EA(106 KN/m) EI(106 KN·m2/m) W(KN/m/m) µ Injection Concrete 4.4 0.18 8.4 0.15 which include E-modulus of elasticity, C-cohesion, φ-angle of friction, μ-Poisson's ratio, γ-heavy, w-gravity factor, EA-nominal rigidity, EI-bending stiffness. 4.
Tunnel Group Analysis of the Different Mechanical Properties of Excavation Three different excavation programs can be used in four water tunnel excavationsof the first phrase of the project.
For the latter excavation of the tunnel, the tunnel project area affected by the first digging, the stress can be released and the stability of the first excavation was less affected
References [1] Shengji Jin, Ning Li, Yongqin Rui,et al.Research on Mechanical Characteristics of Blasting Vibration during Tunnel Excavation[J].Journal of Shenyang Jianzhu University (Natural Science), 2012,28(1): 66-71.
Tab.1 Parameters values of materials mechanical Rock parameters Strongly weathered granite Moderately weathered granite Breezely weathered granite Strongly weathered Gneiss Moderately weathered Gneiss γ KN/m3 23.3 25.0 25.8 23.0 24.5 C(KPa) 60 400 1300 45 300 φ (°) 27 32 45 24 30 E (GPa) 2.50 8.00 15.80 1.50 4.00 µ 0.38 0.29 0.25 0.40 0.33 Tab.2 Concrete parameter values parameters EA(106 KN/m) EI(106 KN·m2/m) W(KN/m/m) µ Injection Concrete 4.4 0.18 8.4 0.15 which include E-modulus of elasticity, C-cohesion, φ-angle of friction, μ-Poisson's ratio, γ-heavy, w-gravity factor, EA-nominal rigidity, EI-bending stiffness. 4.
Tunnel Group Analysis of the Different Mechanical Properties of Excavation Three different excavation programs can be used in four water tunnel excavationsof the first phrase of the project.
For the latter excavation of the tunnel, the tunnel project area affected by the first digging, the stress can be released and the stability of the first excavation was less affected
References [1] Shengji Jin, Ning Li, Yongqin Rui,et al.Research on Mechanical Characteristics of Blasting Vibration during Tunnel Excavation[J].Journal of Shenyang Jianzhu University (Natural Science), 2012,28(1): 66-71.