EFFECT OF MECHANICAL PROPERTY MISMATCH ON FAILURE ASSESSMENT CURVE FOR WELDED JOINT WITH A SEMI-ELLIPTICAL CRACK

被引：5
|
作者：
Wang, Zhong-Xian [1 ]
Zhang, Ruei-Feng [1 ]
Chao, Yuh J. [2 ,3 ]
Lam, Poh-Sang [4 ]
机构：
[1] Jiangsu Univ Zhenjiang, Fac Civil Engn & Mech, Zhenjiang 212013, Jiangsu, Peoples R China
[2] Tianjin Univ, Coll Mat Sci & Engn, Tianjin 300072, Peoples R China
[3] Univ S Carolina, Dept Mech Engn, Columbia, SC 29208 USA
[4] Savannah River Natl Lab, Aiken, SC 29808 USA
来源：
INTERNATIONAL JOURNAL OF APPLIED MECHANICS | 2013年 / 5卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Semi-elliptical crack; mechanical property mismatch; elastic-plastic fracture; constraint effect; J-A(2) two-parameter fracture theory; failure assessment diagram (FAD); welded joint; FEA; TIP FIELDS; TRIAXIALITY PARAMETER; TRANSITION CURVE; LIMIT LOAD; FRACTURE; STRESS; CONSTRAINT; GROWTH; FAMILY;
D O I：
10.1142/S1758825113500294
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
Elastic-plastic finite element analysis was performed to study the welded joints with a semi-elliptical crack. This research includes the effects of crack depth, strength mismatch ratio, and weld width on the crack driving force J-integral and the constraint parameter A(2) at the crack tip. A two-parameter J-A(2) fracture criterion based on the present results of crack tip stress field in the welded joints was established. The corresponding failure assessment diagrams were investigated in detail, from which the reliability and safety margin of the welded structures were discussed.
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页数：18
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