Plastic strip model of cracked weld joint with residual stresses

被引：2
|
作者：
Liu, QC [1 ]
机构：
[1] Univ Sydney, Ctr Adv Mat Technol, Dept Mech & Mechatron Engn, Sydney, NSW 2006, Australia
来源：
THEORETICAL AND APPLIED FRACTURE MECHANICS | 1998年 / 30卷 / 01期
关键词：
D O I：
10.1016/S0167-8442(98)00045-7
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The effect of residual stresses on the fracture behavior of a cracked weld joint is studied by making use of the continuous dislocation formulation. Considered are the plastic zone length of the strip model zone and the opening displacement of a crack that is normal to both weld line and base metal boundary; they depend on the character of the yield stresses for the base metal (BM), weld material (WM), and heat affected zone (HAZ). The crack driving force is found to increase with the tensile residual stress while crack initiation and growth are suppressed if the residual stress is compressive. Moreover, the plastic zone and crack opening displacement are found to decrease linearly with the HAZ yield strength as the HAZ width is increased for HAZ yield strength greater than that of BM. (C) 1998 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：51 / 63
页数：13
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