对于界面断裂的三维编织CMC,其断裂混合度Ψ对材料的断裂韧性影响显著.尽管由于一个不确定的参量--断裂特征长度,界面断裂混合度几乎难以确定,但是与界面断裂混合度相关的裂纹尖端断裂混合度Ψtip可以唯一确定.这样,就可以用裂纹尖端断裂混合度Ψtip研究三维编织CMC的断裂韧性.本文通过数值方法分析了倾斜角度、界面层厚度与混合度的关系,进一步研究了三维编织CMC的裂纹扩展路径对于裂尖混合度的影响,为材料断裂韧性的优化设计提供了依据.
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