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带有两个共线裂纹载流薄板的温度场及热应力强度因子
刘俊杰; 白象忠; 郑坚; 敖涛
Source Publication机械强度
2007
Volume29Issue:1Pages:103-108
ISSN1001-9669
Abstract采用复变函数的方法,给出带有两个等长度共线穿透裂纹的无限大载流薄板在瞬间电流作用下,裂纹尖端附近产生的温度场的表达式,得到温度在裂纹尖端的奇异特征.在通入垂直于裂纹的均匀电流作用下,由于裂纹的存在,裂纹尖端出现绕流现象,产生焦耳热,瞬时高温形成点热源.通过点热源在金属薄板内形成的温度场, 可以导出裂纹尖端产生的热应力强度因子表达式.将其与外载荷产生的应力强度因子叠加,可建立通电状态下的断裂判据.算例分析表明,点热源在裂纹尖端附近产生的热应力强度因子为负值,可以部分抵消无穷远处施加的拉应力产生的应力强度因子的作用,进而达到止裂的目的.文中建立带有两个等长度共线穿透裂纹载流薄板的热应力强度因子的概念.其研究结果对工程结构实施电磁热效应裂纹止裂具有理论意义和实用价值.
Subject Area力学
Indexed By其他
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/16337
Collection力学所知识产出(1956-2008)
Recommended Citation
GB/T 7714
刘俊杰,白象忠,郑坚,等. 带有两个共线裂纹载流薄板的温度场及热应力强度因子[J]. 机械强度,2007,29,1,:103-108.
APA 刘俊杰,白象忠,郑坚,&敖涛.(2007).带有两个共线裂纹载流薄板的温度场及热应力强度因子.机械强度,29(1),103-108.
MLA 刘俊杰,et al."带有两个共线裂纹载流薄板的温度场及热应力强度因子".机械强度 29.1(2007):103-108.
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