文献类型：会议论文

英文题名：Investigation on validity of J-integral of edge crack under cold rolling condition

作者：Chen, Jianjun[1];Li, Xiaoxue[1];Pan, Hongliang[1]

机构：[1]E China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

会议论文集：International Conference on Mechatronics Engineering and Computing Technology (ICMECT)

会议日期：APR 09-10, 2014

会议地点：Shanghai, PEOPLES R CHINA

语种：英文

外文关键词：Cold rolling; J-integral; Edge crack

摘要：In this paper the characterization of the edge crack in the strip steel are studied by using numerical simulation method. The developments of the stress and strain near the crack tip are obtained and the value of the J-integral of edge crack under the rolling process is then examined. FE simulation result shows that the J-integral is not always path independent in the whole rolling process. When the crack is far away from the roller, the J-integral is path independent. When the crack enters the cold rolling region, the unload phenomena will occur near the crack tip which cause the incremental theory of plasticity failed and the conservation of the J-integral is not valid any more. The J-integral failure region is then determined by a series of FE simulations.