双材料界面Ⅰ型裂纹尖端的弹粘塑性场  

A study on the elastic-viscoplastic field near the Mode Ⅰ dynamic propagating crack-tip interface in double dissimilar materials

作　　者：陈树华 梁文彦 王振清[1] 韩玉来 

机构地区：[1]哈尔滨工程大学智能结构与先进复合材料实验室,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2010年第10期1335-1339,共5页Journal of Harbin Engineering University

基　　金：中国高校基本科研业务费专项基金资助(HEUCF20100201);哈尔滨工程大学基础研究基金资助项目(HEUFT07005)

摘　　要：考虑裂纹尖端的奇异性,建立了双材料界面准静态扩展裂纹尖端的弹粘塑性控制方程.引入界面裂纹尖端的位移势函数和边界条件,对刚性-弹粘塑性Ⅰ型界面裂纹进行了数值分析,求得了界面裂纹尖端应力应变场,并讨论了界面裂纹尖端场随各影响参数的变化规律.计算结果表明,粘性效应是研究界面扩展裂纹尖端场时的一个主要因素,界面裂纹尖端为弹粘性场,其场受材料的粘性系数和奇异性指数控制.In order to consider the singularity of crack-tip,the elastic-viscoplastic governing equations of double dissimilar materials at a quasi-static propagating interface crack-tip field were established.The displacement potential function and the boundary condition of the interface crack-tip were introduced,and the numerical analysis of a rigid-elastic viscoplastic interface for Mode I was worked out.The stress-strain fields were obtained at the crack-tip and variations of the solutions were discussed according to each parameter.The numerical results show that the viscosity effect is a main factor in interface propagation of a crack-tip field,and the interface crack-tip is a viscoplastic field that is governed by a viscosity coefficient and a singularity factor.

关 键 词：界面裂纹 粘性效应 控制方程 弹粘塑性材料 

分 类 号：O346.1[理学—固体力学]