Diagnostics of residual stresses and estimation of their influence on the static strength of welded joints of pipes with different thicknesses with crack-type defects

被引：0
作者：
Osadchuk V.A. [1 ]
Porokhovs'kyi Y.V. [1 ]
Ivanchuk O.O. [1 ]
机构：
[1] L'vivs'ka Politekhnika National University, Lviv
来源：
Journal of Mathematical Sciences | 2009年 / 162卷 / 2期
关键词：
Welding; Residual Stress; Weld Joint; Stress Intensity Factor; Static Strength;
D O I：
10.1007/s10958-009-9628-3
中图分类号：
学科分类号：
摘要：
Within the framework of the calculation-experimental method suggested by Pidstryhach and his followers, a mathematical model for definition of residual stresses in the zone of circular welded joints of pipes with different thicknesses is developed. We constructed a functional to determine the residual thermoplastic strains on the basis of theoretical relations and experimental data obtained by a nondestructive (semidestructive) methods. Using the two-parametric criterion R6 of fracture mechanics and a failure assessment diagram constructed on its basis, the strength reserve coefficients of a welded joint of the main pipeline with different thicknesses under internal pressure and the presence of a surface crack in the thinner pipe wall are determined. The influence of residual stresses on the strength reserve coefficients is estimated. © 2009 Springer Science+Business Media, Inc.
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页码：161 / 179
页数：18
相关论文
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