A fracture mechanics model for interacting cracks in thermal fatigue

被引：0
|
作者：
Johansson, T
Kullig, E
BrucknerFoit, A
RieschOppermann, H
机构：
来源：
ECF 11 - MECHANISMS AND MECHANICS OF DAMAGE AND FAILURE, VOLS I-III | 1996年
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D O I：
暂无
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
A complex pattern of branched irregular surface cracks develops during thermal cyclic loading of smooth austenitic steel plates. Geometrical simulation models for initiation and propagation of cracks were used to assess and to understand the different stages of damage evolution. A fracture mechanics assessment of a great number of cracks is necessary at each simulation step. The fracture behaviour of branched cracks is described in terms of an effective crack length. The effect of crack branching and of interaction of adjacent cracks is taken into account. The present contribution shows how the effective crack length is determined and shows how different domains of stress amplification and of crack shielding can be defined for adjacent cracks.
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页码：257 / 262
页数：6
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