利用复合材料细观有限元分析方法,对SiC颗粒增强6061Al合金复合材料的单拉行为,单轴棘轮行为进行数值模拟.模拟中讨论了耦合自由边界、界面结合状态对复合材料棘轮行为的影响;同时,分析了基体和界面的微观变形特征及其演变规律.选取1组合理的微结构参数,对复合材料的棘轮行为进行数值模拟,并通过与实验结果的比较,检验有限元模型的合理性.结果表明:耦合边界很大程度改善了模拟结果;界面结合状态越好,即界面弹性模量、屈服强度和硬化模量越高,产生的棘轮变形越小;具有合理参数值的弱界面模型给出的棘轮变形预测结果比完好界面模型的结果更接近于实验值.
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