Local approach to fracture for cleavage crack arrest prediction

被引：23

作者：

Berdin, Clotilde ^{[1
]}

Hajjaj, Mejido ^{[2
]}

Bompard, Philippe ^{[1
]}

Bugat, Stephane ^{[2
]}

机构：

[1] Ecole Cent Paris, L MSSMat, CNRS, UMR 8579, F-92295 Chatenay Malabry, France

[2] EDF, Ctr Renardieres, F-78818 Moret Sur Loing, France

来源：

ENGINEERING FRACTURE MECHANICS | 2008年 / 75卷 / 11期

关键词：

cleavage; arrest toughness; local approach; dynamic fracture;

D O I：

10.1016/j.engfracmech.2007.08.013

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Crack arrest can complement the crack initiation concept to assess integrity of structures. This paper deals with the application of a local approach model derived from the RKR model to predict cleavage crack propagation and arrest in thermal shock experiments performed on pre-cracked discs made of a low alloy bainitic steel. The numerical procedure takes into account dynamic effects and an accurate behavior law for the material. Simulations with a crack speed criterion help the identification of the critical stress criterion. The results show a good prediction of the crack jump when a 3D modeling is used. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：3264 / 3275

页数：12

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