含界面裂纹复合材料的断裂分析

弹性复合材料界面裂纹尖端场是具有振荡奇异性的偶合场，复应力强度因子是这类场的重要指标。本文利用Ｊ积分和相互作用积分求解复强度因子的方法，给出了有限元法数值结果的算例，并对所建立的力学模型进行了计算与分析讨论。

On fractural analysis for composites with interfacial crack

The stress field for vicinity of interfacial crack between the dissimilar isotropic elastic bimaterial has an oscillatory singular behaviour, which is entirely different from that of unique homogeneous cracked materials. The oscillatory singular stress field can be scaled by a complex stress intensity factor. Firstly, the present paper has developed the numerical methods for evaluation of the complex stress intensity factor, based on J integral and interaction integral schemes. Then, the authors have established two kinds of models for fracture analysis of the interfacial cracked sandwich composites. Finally, some numerical results discussion and conclusions for typical problems are given.