中文摘要：

该研究针对层状复合材料中正交于层合面的裂纹，研究裂纹前方层状界面发生屈服或脱粘现象对该裂纹前沿应力场的扰动．通过利用叠加原理，借用滑移型位错密度表征界面的屈服或脱粘．利用Chebyshev数值积分法求解相应的位错密度的奇异积分方程，得到沿界面屈服／脱粘区域的位错密度分布及裂端区应力场．结果表明，若层状复合材料界面为发生屈服或脱粘，将减弱独立层裂尖的应力奇异性，进而抑制独立层中裂纹的扩展．

英文摘要：

The influence of interface yielding/debonding on stress redistribution ahead of the crack tip in laminated composites is performed in this study. By method of the superposition principle, a continuous distribution of sliding dislocation density is used to represent the interface yielding/debonding. This proce- dure reduces the problem to a singular integral equation which can be solved numerically by using of Che- byshev polynomials. The distribution of dislocations at the interface is numerically obtained. The role of the interface debonding which redistributes the stress ahead of the crack tip in the neighboring uncracked layer is also presented. It is concluded that the interface debonding or yielding weakens the stress singularity near the crack tip and has a shielding effect on the crack growth in anisotropic composites.