首先介绍了描述复合材料出现损伤时细观应力场的剪滞模型;给出了模拟陶瓷基复合材料基体随机开裂的有关公式;然后采用Monte Carlo方法模拟了基体随机开裂的过程;最后通过计算机模拟了陶瓷基复合材料基体裂纹的随机演化过程,分析了有关模型参数对基体裂纹演化的影响,并与文献模拟结果进行了对比.研究表明:最终裂纹间距主要分布在1～2倍滑移长度之间;初始开裂应力越大,最终名义裂纹间距越小;Weibull模量越大,最终名义裂纹间距越小;热残余应力越大,最终名义裂纹间距越大;模拟长度对裂纹演化影响很小;Monte Carlo方法可以有效地模拟陶瓷基复合材料的随机开裂过程.
参考文献
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