幂硬化弹塑性-刚性界面Ⅲ型定常扩展裂纹尖端的渐近场  

Near-tip Asymptotic Field for a Constantly Growing Crack at the Interface between a Power-law Elastic-plastic Solid and a Rigid Substrate

作　　者：唐立强[1] 姜民政 刘长海 

机构地区：[1]哈尔滨工程大学建筑工程学院,哈尔滨150001

出　　处：《力学季刊》2002年第2期182-188,共7页Chinese Quarterly of Mechanics

基　　金：黑龙江省自然科学基金(2001年)

摘　　要：对幂硬化弹塑性材料-刚性材料界面上裂纹以定常方式扩展的Ⅲ型问题进行弹塑性渐近分析,给出裂纹尖端的应力、应变和位移场解。通过数值计算,考察了不同Mach数以及裂纹尖端混合参数对场解的构造以及应力、应变分布的影响,为给出合理的断裂准则提供理论依据。The asymptotic analysis has been made of a constantly growing mode K crack at the interface between a power-law elastoplastic solid and a rigid substrate and the accordes ponding stress, stran and displacement fields have been given. Through numerical calculations, the influence of Mach numbers and near-tip mixture parameter on the elastoplastic fields is studied which provides theoretical foundation for establishing fracture toughness criteria.

关 键 词：幂硬化 弹塑性材料 界面裂纹 定常扩展裂纹 渐近解 

分 类 号：O346.1[理学—固体力学]