Local fracture resistance behavior of interface regions in a dissimilar metal welded joint

被引：34
作者：
Fan, K. [1 ]
Wang, G. Z. [1 ]
Xuan, F. Z. [1 ]
Tu, S. T. [1 ]
机构：
[1] E China Univ Sci & Technol, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China
来源：
ENGINEERING FRACTURE MECHANICS | 2015年 / 136卷
基金：
中国国家自然科学基金;
关键词：
Fracture resistance; Interface region; Dissimilar metal welded joint; Material constraint; Mismatch; DUCTILE CRACK-GROWTH; NUCLEAR-POWER-PLANT; MECHANICAL-PROPERTIES; GURSON MODEL; ALLOY; SIMULATION; CONSTRAINT; WELDMENTS; EXTENSION; TOUGHNESS;
D O I：
10.1016/j.engfracmech.2015.02.007
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
The finite element method based on Gurson-Tvergaard-Needleman damage mechanics model is used to investigate local fracture resistance behavior of two interface regions in a dissimilar metal welded joint. The variation of local fracture resistance with crack locations is analyzed by local material constraint effect. The results show that when initial cracks are located in hard and soft materials in interface regions, respectively, the local material constraint has opposite effect on local fracture resistance. The degree and distance range of material constraint effect increase with increasing the degree of mismatches in yield strength and work hardening between two materials. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：279 / 291
页数：13
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