金属基复合材料循环硬化性能细观力学分析

以细观力学的平均场理论为基础，给出一种新的分析金属基复合材料循环硬化性能的增量方法，在每个增量过程中，把基体看作各向异性弹性材料来处理，然后利用Ｍｏｒｉ－Ｔａｎａｋａ平均场理论建立了复合材料应力与应变的增量关系，应用上述方法及基体的混合强化模型，分析了ＳｉＣ／金属基复合材料的循环更化性能，并与献的实验结果进行了比较。

Micromechanical Analysis of Cyclic Behaviors for Metal-Matrix Composites

A new incremental method is proposed to predict the cyclic behavior of metal-matrix composites. In each incremental step, the matrix is considered to be an anisotropic material whose stiffness tensor is chosen as the tangent moduli of the matrix studied. The Eshelby tensor for an ellipsoidal inclusion embeded in an anisotropic matrix is calculated numerically. With the aid of Mori-Tanaka mean field theory and numerical solution of the Eshelby tensor, the incremental stress/strain relation of the composite is derived. The prediction of the tensile and cyclic hardening behavior for the particulate reinforced and whiskers reinforced SiC/AI metal-matrix composings agrees quantitatively well with the adults given in the literature.