DOMAIN-INDEPENDENT VALUES OF THE J-INTEGRAL FOR CRACK IN WELDS SUBJECT TO MODE-I LOADING

摘要：

This paper describes an approach for computing domain-independent values of the J-integral for crack in welds subject to Mode-I loading. For the analysis of crack in welds, residual stress analysis and fracture mechanics analysis must be performed sequentially. In this study, residual stresses in welds are obtained by carrying out three-dimensional thermal elasticplastic FE analysis. Then, FE analysis method which is able to calculate domain-independent values of the J-integral for crack in three-dimensional residual stress bearing bodies is developed to evaluate the J-integral for mode-I centre-crack in welds when mechanical Mode- I loading is superimposed on the residual stress field. It is shown that the J value for the case when mechanical stresses are superimposed on the residual stresses is larger than that for the case when only residual stresses are present.

作者: Chin-Hyung Lee Kyong-Ho Chang Gab-Chul Jang Hyun-Chan Park

作者单位: Conventional Rail Engineering Corps, Korea Railroad Research Institute, Kyunggi-do, Korea Department of Civil and Environmental Engineering, Chung-Ang University, Seoul, Korea Institute of Technology and Science, Chung-Ang University, Seoul, Korea

会议类型: 国际会议

会议名称: 第九届工程结构完整性国际会议(The Ninth International Conference on Engineering Structural Integrity Assessment)

会议地点: 北京

会议语种:英文

在线出版日期: 2007-10-15（万方平台首次上网日期，不代表论文的发表时间）