一种计算三维裂纹应力强度因子的新方法  

A New Method for Calculation of Three Dimensional Crack Stress Intensity Factors

作　　者：曹宗杰[1] 闻邦椿[1] 王志超 

机构地区：[1]东北大学机械工程与自动化学院,沈阳110004 [2]Civil Engineering and Engineering Mechanics,University of Arizona,Tucson,USA

出　　处：《力学季刊》2001年第4期401-407,共7页Chinese Quarterly of Mechanics

摘　　要：构造了一种新的三维奇异单元,提出了一种有效计算三维裂纹应力强度因子新的数值方法。该方法的计算结果与理论解和Newman解结果一致;与Panson等方法相比所使用的自由度数大大减小。结果表明该方法是一种高效、稳定可靠的计算方法。In this paper, a new singular element about three dimensional cracks was formed and a new method to compute 3-D stress intensity factors was proposed. The calculating solutions obtained by present method were compared with theoretical solutions, Newman's solutions as well as other solutions. The results by present method are in good agreement with those of them. It shows that the present method is highly efficient and reliable in applications.

关 键 词：应力强度因子 三维裂纹 三维奇异单元 理论解 热影响区 Panson解 焊接结构 表面裂纹 有限元 裂尖模型 

分 类 号：TG404[金属学及工艺—焊接] O346.1[理学—固体力学]