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Finite Element Simulation of Abrasive Wear and Study of Wear Resistance of Material Fan Yujin1, a, Li Zhekun1, Han Teng1, Wang Weida1 1Faculty of mechanical and electrical engineering, kunming university of science and technology, kunming,650050,china afanyujinkmust@163.com Keywords: abrasive wear; wear resistance; surface deformation; finite element analysis; numerical simulation Abstract.
Though the development of material science, surface physics and chemistry, surface analyzing and testing technology greatly contributed to further research of friction and wear, however, abrasive wear was complex process and difficult to describe simply[5-6].
There were three metallic materials mentioned in the paper, 35 quenched and tempered steel, 45 normalized steel and 35SiMn quenched and tempered steel, material elasticity modulus E=206GPa, Poisson ν =0.3, the friction coeffient of particle and material surface μ=0.15, Figure 1 was the stress-strain curve of metal material, the mechanical parameters of materials were as follow. 35 quenched and tempered steel: yield stress σs=295MPa, tangent modulus Ctm=825MPa, tensile strength σb=550MPa, reduction of area ψ=0.38, actual tensile strength σbt=1052MPa. 45 normalized steel: yield stress σs=295MPa, tangent modulus Ctm=1070MPa, tensile strength σb=590MPa, reduction of area ψ=0.38, actual tensile strength σbt=952MPa. 35SiMn quenched and tempered steel: yield stress σs=510MPa, tangent modulus Ctm=1120MPa, tensile strength σb=785MPa, reduction of area ψ=0.45, actual tensile strength σbt=1427MPa.
Acknowledgement This work is supported by the National Natural Science Foundation of China, No.51168020..
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The evaluation of dental materials is made by testing the bio-compatibility.
Biological systems may produce deterioration of materials, known as biodegradation [3].
Reyes-Gasga, Synthesis and characterization of poly(methylmethacrylate) polymerized by microwave energy or conventional water bath, Journal of Applied Polymers Science. 109 (2008) 3953-3960
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Auction Mechanism and Methods for Heterogeneous Goods Such as Multiple Polymer Materials Congjun Rao College of Mathematics and Computer Science, Huanggang Normal University, Huanggang 438000, China cjrao@163.com Keywords: Multi-object auction; heterogeneous goods auction; Polymer Materials Abstract.
In this paper, the auction mechanism and methods for heterogeneous goods such as multiple polymer materials (rubber, plastic, polymer fibre, adhesive, polymer coating) is investigated.
Introduction In the market trade, the buyers often encounter high polymer materials procurement, such as the rubber, plastic, polymer fibre, adhesive, polymer coating and polymer matrix composites.
We can use the auction method to procure this kind of polymer materials.
Acknowledgments This work is supported by the 2012 National Natural Science Foundation of China Grant to C.J.

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