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目的 分析夹杂分布和取向对复合材料塑性性能的影响方法 用PCW(PonteCasteneda和Willis)的弹性细观力学模型及应力二阶矩割线模量法,给出分析复合材料微结构分布及取向对其塑性性能影响的一种模型结果 对所研究的SiCAl复合材料系统,计算结果表明颗粒分布对材料的塑性性能影响不大本文证明MoriTanaka模型在分析夹杂具有取向分布时,它相当于PCW方法中刻划夹杂分布的椭球域的形状和取向与夹杂一致,但这种分布是无法在PCW的结构中实现结论 提出能够同时考虑夹杂形状、取向及分布对复合材料塑性性能影响的解析模型,证明MoriTanaka模型的微结构无法在PCW的结构中完全实现
Aim To analyze the influence of inclusion distribution and orientation on the plastic properties of composites.METHODS The elastic micromechanical model of PCW (PonteCasteneda and Willis) and the secant second-order modulus of stress method were used to analyze the distribution and orientation of composite microstructures Plasticity Effect on the Results of a Model For the SiCAl composites studied, the results show that the distribution of particles has little effect on the plasticity of the material. This paper proves that the MoriTanaka model is equivalent to the characterization of the PCW method in the analysis of inclusions with orientation distribution The shape and orientation of inclusions in the ellipsoidal domain are the same as the inclusions. However, this distribution can not be achieved in the PCW structure. Conclusions An analytical model that can simultaneously consider the effect of inclusion shape, orientation and distribution on the plastic properties of composites is presented. The MoriTanaka model The microstructure can not be fully realized in the PCW structure