Numerical analysis of the stress-strain distributions in the particle reinforced metal matrix composite SiC/6064Al

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• 作者：M.N. Yuan^a ; ^b ; ^{mnyuan@nuc.edu.cn} ; Y.Q. Yang^b ; C. Li^a ; P.Y. Heng^a ; L.Z. Li^a
• 关键词：A. Metal matrix composites ; D. Bonding ; E. Mechanical
• 刊名：Materials and Design
• 出版年：2012
• 期刊代码：56_02613069
• 类别：ms
• 出版时间：June, 2012
• 卷：38
• 期：Complete
• 页码：1-6
• 文件大小：871 K

摘要

The axisymmetric cell model consisting of interface, matrix and reinforced particle is used to simulate the tensile test of particle reinforced metal matrix composite for predicting the micro stress/strain field and macro tensile stress/strain curve. In simulation of the tensile test, the cohesive element model is selected to model interfacial crack growth. It mainly analyzed the effects of interfacial properties, reinforcement volume fractions and aspect ratios on the stress-strain states of particle reinforced metal matrix composite. The results show that the peak micro stress and plastic strain occur at the interface in which it is a certain angle from the tensile stress direction; with the interfacial fracture toughness and reinforcement volume fraction increasing, the flow stress increases firstly and then decreases. The tensile stress-strain properties of SiC/6064Al are good when the interfacial fracture toughness is equal to 60 J/m and the reinforcement fraction volume is equal to 20%. Smaller reinforcement aspect ratio leads to smaller micro stress in composites.