机械科学与技术2001，Vol.20Issue(3)：328-330,3.
力学不均匀性对含横向裂纹焊接接头J积分的影响
Influence of Mehanical Heterogeneity on J-integral of Welded Joint Containing Transverse Crack
摘要
Abstract
Extended J-integral of different strength mis-matched welded joint containing transverse crack under plain stress condition and longitudinal load was calculated using a Delorenzi virtual crack extension method of MARC finite element program. The results show that mechanical heterogeneity has great influence on the J-integral of welded joint containing transverse crack. The J-integral on the path cross the interface between welded joint and base metal is higher than the J-integral on the paths in the weld metal for undermatched joint,while the J-integral on the path cross the interface between weld metal and base metal is lower than the J-integral on the paths in the weld metal for overmatched joint. Moreover,the difference of J-integral values increases with the increasing of the load and strength mismatching difference and the path-enclosed length of interface between weld metal and base metal. The influence of mechanical heterogeneity on the J-integral of welded joint containing transverse crack is mainly caused by the strength mismatching and the length of interface between weld metal and base metal.关键词
虚拟裂纹扩展/焊接接头/横向裂纹/J积分/有限元分类
矿业与冶金引用本文复制引用
田富强,贺定勇,李晓延,史耀武..力学不均匀性对含横向裂纹焊接接头J积分的影响[J].机械科学与技术,2001,20(3):328-330,3.基金项目
国家自然科学基金项目(No.59501011)和北京市科技新星计划项目资助 （No.59501011）
