西安科技大学学报2013，Vol.33Issue(2)：211-215,5.
焊接接头力学性能不均匀性对管道裂纹断裂参量的影响分析
Effect of welded mechanical heterogeneity on fracture parameters of pipeline cracks
摘要
Abstract
Based on a numerical simulated approach of the uniform change of material mechanical property , the effect of the welded mechanical heterogeneity on the stress-strain fields and J-integral along a three dimension crack are simulated and analyzed by using a semi-elliptical crack in welded joints of pipeline in this paper. The results show that the maximal strain and stress and J-integral are located at the middle of the semi-elliptical cracks, and the crack is more susceptible to propagate at the boundaries of base metal and heat affect zone, and the propagating tending direction of the crack on the boundaries of weld metal and heat affect zone is the weld metal.关键词
焊接接头/力学性能不均匀性/应力应变场/J积分Key words
welded joint/mechanical heterogeneity/stress and strain field/J-integral分类
矿业与冶金引用本文复制引用
龚晓燕,焦康,赵凌燕,薛河..焊接接头力学性能不均匀性对管道裂纹断裂参量的影响分析[J].西安科技大学学报,2013,33(2):211-215,5.基金项目
国家自然科学基金(11072191) （11072191）
