Configurational force based analysis of creep crack growth

被引：0
作者：
O. Kolednik
A. Tiwari
C. Posch
M. Kegl
机构：
[1] Austrian Academy of Sciences,Erich Schmid Institute of Materials Science
[2] Materials Center Leoben,Faculty of Mechanical Engineering
[3] University of Maribor,Metallurgical & Materials Engineering Department
[4] Indian Institute of Technology Ropar,undefined
来源：
International Journal of Fracture | 2022年 / 236卷
关键词：
Creep crack growth; Crack driving force; -integral; -integral; Configurational force concept; Finite element method;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Based on the concept of configurational forces, the driving force of cracks in elastic–plastic, creeping materials is derived. In a numerical study, the variation of the crack driving force with increasing creep time is compared to the behaviors of different parameters that have been used in literature to describe the tendency to creep crack growth. This is performed for the assumption of stationary cracks in C(T)-specimens made of Waspaloy at 700 °C. The loading conditions are varied so that small-scale creep, transition creep, or extensive creep conditions prevail. Either the load or the load-point displacement are held constant. It is demonstrated that, for the considered cases, the conventional creep crack growth parameters do not reflect the crack driving force, but qualitatively follow a behavior similar to the (absolute value of the) time derivative of the crack driving force.
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页码：175 / 199
页数：24
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