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Fracture Mechanics Analysis of a Crack in the Weld using the J-integral  

Chang, Kyong Ho (중앙대학교 건설환경공학과)
Lee, Chin Hyung (중앙대학교 기술과학연구소)
Publication Information
Journal of Korean Society of Steel Construction / v.17, no.2, 2005 , pp. 243-251 More about this Journal
Abstract
The fracture mechanics analysis of a crack in a weld must consider residual stress generated during welding. The standard definition of the J-integral requires a path dependent value in the presence of a residual stress field. Therefore, it is necessary to develop a path independent J-integral definition for a crack in a residual stress field. This paper addresses the modification of the Rice-J-integral to produce a path- independent J-integral when residual stresses and external forces are present. The residual stress problem is treated as an initial strain problem and the J-integral proposed for this type of problems is used. A program which can evaluate the J-integral for a crack in a weld is developed using the proposed J-integral definition. The situation when only residual stress is present is examined as is the case when mechanical stresses are applied in conjunction with a residual stress.
Keywords
Fracture Mechanics; Weld; Crack; J-integral; Residual stress;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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