热/机械载荷作用下金属基复合材料多纤维断裂的应力场

Stresses in Metal Matrix Composites with Multiple Broken Fibers under Thermomechanical Loading

作为研究金属基复合材料破坏特性的前期工作,主要讨论了在热/机械载荷作用下多纤维断裂的复合材料应力场.运用影响函数加权叠加方法求解复合材料多纤维断裂时的应力场,并利用了已得出的结论:断裂纤维只对附近纤维与基体的应力有影响.可将影响函数仅建立在与断裂纤维紧邻的纤维和基体范围内.根据以上结论,对求解多纤维断裂问题的模型进行简化,基于剪切滞后模型理论,控制微分方程建立在受纤维断裂影响的纤维和基体范围内,大大降低求解的计算量,把金属基复合材料的应力场与纤维和基体体积分数以及纤维-基体界面特性定量地联系起来.

Stresses in metal matrix composites with mul function superposition method. A simple model for muhi theory to compute stresses according to the fact that a tiple broken fibers are analyzed using an influence pie fiber breaks is proposed based on the shear-lag broken fiber has influence on adjacent fibers and matrixes. Quantitative relation between the stress field and micro-parameters such as fiber volume fraction,matrix volume fraction, and the interface properties has been established.