粘弹性—弹性材料界面上准静态扩展裂纹尖端的渐近场  

The Near-tip Field for Steady Growth Grack Along an Interface of Viscoelastic-elastic Bimaterial

作　　者：唐立强 孙旭光 

机构地区：[1]哈尔滨工程大学航天工程系,哈尔滨150001

出　　处：《哈尔滨工程大学学报》1996年第1期8-14,共7页Journal of Harbin Engineering University

基　　金：黑龙江省自然科学基金资助项目

摘　　要：在准静态扩展条件下,研究了幂硬化粘弹性一弹性界面裂纹,反平面剪切时尖端附近应力、应变分布问题。通过量级分析得出在粘性、弹性变形均占主导地位时。应力应变具有相同的奇异量级,并给出裂纹尖端场的控制方程和连接条件。通过数值计算给出应力、应变的分布。讨论了界面材料参数对场分布的影响。在非稳态扩展中稳态场是占主导地位的。The asymptotic stress and strain field at near-tip of steady growing crack in power law viscous -elastic bimaterial is studied under antiplane shear case. Through the analysis of order for n≥3, the elastic and the power law viscous terms must together govern the asymptotic be- havior as r→0, the stress and strain have the some singularities and the governing equations are given. The distribution of stresses, strains and displancements are influenced by the interface material parameter In the case of nonsteady growth crack, this field is also predominant.

关 键 词：粘弹性 弹性 界面 准静态扩展 裂纹尖端场 

分 类 号：O346.1[理学—固体力学]