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The Effect of Particles' Size on the Plastic Behavior of Particles Reinforced Metal Matrix

机译:颗粒尺寸对颗粒增强金属基体塑性行为的影响

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The size effect on particles reinforced metal matrix composites (MMCp) was investigated by a numerical method. A numerical multi-particles unit cell model has been constructed to carry out numerical analysis. In this model, circle particles were randomly placed in matrix according to uniform distribution, the sizes of particles in the paper were classified into 4 groups: 6um, 13.5 μm ,50μm, and 100μm respectively. For investigating the effect of particles' size on the plastic behavior of MMCp, the Griffith fracture criterion and the damage of ceramic particles were considered. Result showed that there was a close relationship between the particle size and the deformation behavior of the composites. Yield strength and plastic work hardening rate of the composites increase with decreasing particle size. The predicted stress-strain behaviors of the composites were in agreement with the experimental results.
机译:通过数值方法研究了颗粒增强金属基复合材料(MMCp)的尺寸效应。建立了数值多粒子晶胞模型进行数值分析。在该模型中,根据均匀分布将圆形颗粒随机放置在基质中,纸中的颗粒大小分为4组:分别为6um,13.5μm,50μm和100μm。为了研究颗粒尺寸对MMCp塑性行为的影响,考虑了Griffith断裂准则和陶瓷颗粒的损伤。结果表明,颗粒尺寸与复合材料的变形行为密切相关。复合材料的屈服强度和塑性加工硬化率随粒径的减小而增加。预测的复合材料的应力-应变行为与实验结果一致。

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