30Cr1Mo1V转子钢应力强度因子有限元分析  

FEM based stress intensity factor analysis for rotor steel 30Cr1Mo1V

作　　者：胡敏[1] 陈荐[1] 任延杰[1] 何建军[1] 

机构地区：[1]长沙理工大学能源与动力工程学院能源高效清洁利用湖南省普通高等学校重点实验室,湖南长沙410004

出　　处：《电力科学与技术学报》2009年第3期72-76,共5页Journal of Electric Power Science And Technology

基　　金：国家自然科学基金(50775015);湖南省教育厅重点科研项目(06A002)

摘　　要：通过采用20节点solid186退化奇异单元,利用ANSYS软件,对三维断裂参量进行计算和分析,结果表明位移法和J积分法确定应力强度因子是可行的;对一定尺寸的紧凑拉伸试样三维裂纹进行分析,得出30Cr1Mo1V转子钢裂纹尖端KI随裂纹长度和载荷水平改变时的变化规律,为研究汽轮机转子裂纹扩展规律提供了合理、有效的方法.Three-dimensional fracture parameters are calculated and analyzed using the degenerated singular element of 20-node solid186 by the ANSYS software in this paper. Results show that the displacement method and the J integral method are feasible to obtain stress intensity factor. 3 -D crack of a compact tension （CT） specimen with concrete size is also analyzed. The law for the stress intensity factor K1 variation at the crack tip of rotor steel 30Cr1Mo1V with the crack length and the load level changing is obtained. It provides a reasonable and effective method for studying on the crack propagation law.

关 键 词：三维裂纹 奇异单元 应力强度因子 J积分 30Cr1Mo1V 

分 类 号：TK265[动力工程及工程热物理—动力机械及工程]