功能梯度材料的黏弹性断裂问题  

VISCOELASTIC FRACTURE OF A FUNCTIONALLY GRADED MATERIAL STRIP

作　　者：李伟杰[1] 王保林[1] 张幸红[1] 

机构地区：[1]哈尔滨工业大学复合材料研究所,哈尔滨150001

出　　处：《力学学报》2008年第3期402-406,共5页Chinese Journal of Theoretical and Applied Mechanics

基　　金：教育部新世纪优秀人才支持计划资助项目~~

摘　　要：考查存在垂直于梯度方向界面裂纹的功能梯度板条的黏弹性断裂问题.在应力及应变载荷分别作用下,利用有限元法求解线弹性功能梯度材料板条的裂纹尖端场,并分析了裂纹位置、裂纹长度、材料的梯度指数及受载情况对裂纹尖端场的影响.根据黏弹性对应性原理,求解出黏弹性功能梯度板条裂纹问题的应力场强度因子.In this paper, the viscoelastic fracture of a functionally graded material strip with a crack normal to the gradient direction is studied. The linear elastic crack tip fields subjected to stress load and strain load are obtained with the finite element method. The effects of the crack location, crack length, material gradient index and the loading on the crack tip field are investigated. In addition, the stress intensity factors of the viscoelastic functionally graded strip are obtained with the correspondence principle for the viscoelastic solids.

关 键 词：功能梯度材料 断裂力学 线弹性 黏弹性 对应性原理 

分 类 号：TB34[一般工业技术—材料科学与工程]