刚性一粘弹性材料界面Ⅱ型裂纹准静态扩展的渐近解

Asymptotic Solution to the Rigid-Viscoelastic Bi-material Mode-Ⅱ Interfacial Crack

在准静态扩展条件下 ,研究了刚性—粘性材料界面Ⅱ型裂纹尖端场的分布问题 .通过量级分析得出在粘性、弹性变形同时占主导地位时 ,应力、应变具有相同的奇异性量级 .推导了问题的控制方程、界面连接条件 ,求得了裂纹尖端应力场的渐近解 ,讨论了材料参数对场分布的影响 .由于在非稳态扩展中稳态场是占主导地位的 。

The asymptotic stress and strain fields at near tip of steady growing mode Ⅱinterfacial crack between rigid material and elasto_nonlinear viscous material were obtained.The interfacial continuation conditions,and their asymptotic expressions were derived.The distribution of stresses is influenced by the material parameters.In the case of non-steady growing crack,the field is also predominant.