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The material parameters for the rockfill materials are determined from the experimental results of triaxial compression.
Case study Triaxial compression tests of rockfill materials have been conducted on the modeled rockfill materials.
Smith, A neural network approach for solution of the inverse problem for selection of powder metallurgy materials, Journal of Materials Processing Technology. 120(2002) 419-425
Venkatachalam, Testing and modeling two rockfill materials, Journal of Geotechnical and Geoenvironmental Engineering. 129(2003) 206-218
Abbas, Constitutive model for rockfill materials and determination of material constants, International Journal of Geomechanics. 6(2006) 226-237.

Research on Carbon Calculation of Rural Roofing Materials Jun Liu1, a,Linwang Li1, b, Yanlei Sun1, c, Wei Qi1, d 1College of Materials Science and Engineering, Shenyang Jianzhu University, Shenyang 110168, China aliujun2699@126.com, b729202251@qq.com, c714427477@qq.com, d 493334996@qq.com Keyword: carbon emission; rural roofing building materials; calculation method; life cycle Abstract.
Journal of Tsinghua University: Natural Science, Vol.50 (2010) No. 3, 330-334.
Research of Environmental Sciences, Vol.20 (2007) No.6, 149-153.
Journal of Shenyang Jianzhu University: Natural Science, Vol.5 (2013) No. 29, 0876-0882.
Building science, Vol.27 (2011) No. 4, 1-7.

At the start, they indeed used materials that were more accessible.
Videmanis, Projectile penetration depth into wood-based frames of unclassified buildings, Far East Journal of Mathematical Sciences. 3 (2022) 11-20. http://dx.doi.org/10.17654/2229451122002 [34] M. 
Nasrin Ferdous, Kevlar-The Super Tough Fiber, International Journal of Textile Science. 1(6) (2013) 78-83.
Jauberthie, Enhanced Gypsum Panels for Fire Protection, Journal of Materials in Civil Engineering. 20(1) (2008) 71-77. https://doi.org/10.1061/(ASCE)0899-1561(2008)20:1(71) [59] A. de Korte, H. 
Smirnov, Energy performance of temporary shelters, IOP Conference Series: Materials Science and Engineering, Institute of Physics Publishing. 2019.

Chen: A simple flow rule for characterizing nonlinear behavior of fiber composites, Journal of Composite Material, Vol. 23 (1989), pp.1009-1020
Sun: Characterization of elastic-viscoplastic properties of an AS4/PEEK thermoplastic composite, Journal of Composite Material, Vol. 25 (1991), pp.1277-1296
Sun: A plastic potential function suitable for anisotropic fiber composites, Journal of Composite Material, Vol. 27 (1993), pp.1379-1390
Shen, etc: Numerical analysis of interlaminar stresses of angle-ply AS4/PEEK laminate with a central hole, Journal of Thermoplastic Composite Materials, Vol. 22 (2009), pp.383-406
Shen: Numerical analysis and experimental validation of interlaminar stresses of quasi-isotropic APC-2/AS-4 laminate with a central hole loaded in tension, Journal of Thermoplastic Composite Materials, Vol. 23 (2010), pp.413-433.

Summary Crack penetration through the bi-material interface of two polymeric materials was numerically investigated.
References [1] Erdogan F., Journal of Applied Mechanics 30, 232-236, 1963 [2] Bogy, D.B., International Journal of Fracture 38, 911–918, 1971
[3] Meguid, S.A., Tan, M., Zhu, Z.H., International Journal of Fracture 75, 1–25, 1995
[5] Hutař P., Náhlík L., Knésl Z., Computational Materials Science 45, 653-657, 2009
[6] Náhlík L., Šestáková L., Hutař P., Computational Materials Science 46, 614-620, 2010

A Mixed-mode Fracture Criterion for Brittle Materials LI Mingtian1, a, HE Junlian1, b 1Department of Civil Engineering, Shandong Jiaotong University, Jinan, China almt21st@163.com, bhejunlian@hotmail.com Keywords: Fracture criterion, mixed mode, surface crack, direct tension experiments, brittle materials Abstract.
Direct tension experiments of brittle materials with surface crack have been carried out.
But surface and internal cracks were confronted in most cases their fracture criterion ere studied few and most pointed at metal materials.
Therefore based on experimental results and numerical simulation, surface crack growth was studied and a revised fracture criterion fit for brittle materials was presented.
Zhu: International Journal of Rock Mechanics and Mining Science, Vol.41(2004),41 [7] M.L.

Methods and Materials In the present work, a 1×1×8 supercell of rutile TiO2 was constructed.
Ibusuki: Journal of Materials Science, Vol. 33 (1998), pp.5789-5794
Lokhande: Journal of materials science, Vol. 46 (2011), pp.2288-2293
Rabbani: Journal of Sol-Gel Science and Technology, Vol. 64 (2012), pp.17-26
Xing: Journal of Materials Chemistry, Vol. 22 (2012), pp.19718-19725

Observing of Surface Microstructure Pearl in Bionic Materials by Scanning Electron Microscopy Weilin Shi1,2,a, Yefei Jin2, b, Qian Xu1,c 1School of Environmental Science and Engineer, Suzhou University of Sciences and Technology,Suzhou 215009, Jiangsu, P.
China 2School of Life Science, Shaoxing University of Arts and Sciences, Shaoxing 312000, Zhejiang, China aweilin_shi@sina.com, bbotany@usx.edu.cn, cwo13625614097@126.com Keywords: Surface microstructure; scanning electronic microscopy (SEM); freshwater pearls; aragonite blocks；bionic materials Abstract.
The study of surface microstructure pearl in bionic materials will be helpful for the development of bionic materials.
Through the study of the topic, which had made great achievements in bionic materials research,and the study on hypostracum will be meaningful for the bionics Design of many materials.
Journal of East China University of Science and Technology (In China), Vol. 27, No. 2, pp. 204-210, 2001 [7] N.

Thermal Analysis of Dissimilar Materials Diffusion Bonding Using Finite Element Method S.
Silvister Raju4,d 1Department of Mechanical Engineering, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai. 2Department of Metallurgical and Materials Engineering.
Huh, Simulation of superplastic forming/diffusion bonding with finiite-element analysis using the convective coordinate system, Journal of Materials Processing Technology. 89-90, (1999) 92-98
[6] Ekram Atta Al-Ajaj, Awfa Abdul- Rassol Abdullah and Ahmed Ali Moosa, Modeling and Experimental Studies of Diffusion Bonding of Inconel 600 To Pyrolytic Graphite, International Journal of Metallurgical & Materials Science and Engineering. 2278-2516 (2013) 9-30
Mishra, Finite element simulation of selective super plastic forming of friction stir processed 7075 Al alloy, Materials science and Engineering A. 463 (2007) 245 – 248.

The Acoustic Emission Diagnose and Analysis of Journal Bearing‘s Inner Ring Looseness Fault by Truck Wheel Cai,Haichao1,a; Wang,Dongfeng2,b;Xu,Qiaoyu1,c;Shang,Zhendong1,d 1 School of Electromechanical Engineering,Henan University of Science and Technology,Luoyang,Henan,471003,china 2 Science and Technology Department , Bearing Institute of LuoYang , LuoYang, HeNan ,471003,china achclovely99@163.com,bwangdongfeng2006@163.com,cxiaoyu0622@163.com dcnlyszd@163.com Keywords: Rolling bearing; Fault diagnose; Looseness; Wavelet packet analysis Abstract: In this paper, we combine the characteristics of acoustic emission detection with the present condition of truck rolling bearing’s fault detection ,adopting the acoustic emission technique to examine railway freight car ’s journal bearing inner ring looseness .We put forward the method which wavelet packet analyze and withdraw bearing acoustic emission signal’s feature vector.
Acoustic emission technique is a dynamic detection method, which can get materials’ important information,fatigue crack propagation,under the dynamic loading conditions.
The bearing inner ring’s looseness is not bearings’ internal defects, but has the relation to the metal wearing between bearing inner ring and bearing journal[1]. in this paper, we adopt the acoustic emission technology to make a preliminary research and analysis of the bearing inner ring’s loose defect.
In the process of wearing, through the materials ’structure and phase change, the acoustic emission cooperates with superficial impact’s micro-process, rub belt’s damage, the expanding micro-cracks and wear debris’s transfer in the superficial layer.
Acknowledgements This work was financially supported by Henan Province Science and Technology Agency as Key project（0223025200） References [1] Gerald B.