用细观计算力学的方法分析了短纤维增强金属基复合材料(MMC)多重损伤的相互作用及对拉伸强度的影响.采用唯象的内聚力模型模拟界面的脱粘;G-T模型描述延性基体的损伤.在胞元模型的基础上研究了界面强度、纤维长径比等细观参数对材料损伤模式及强韧性的影响.研究表明,界面较弱时,损伤以界面脱粘为主,界面的强度决定了材料强度;当界面较强时,晶须将发生断裂,材料的最终强度由晶须的强度决定.不同界面强度条件下基体中损伤的分布不同.
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