Creep crack initiation and creep crack growth assessments in welded structures

被引：19

作者：

Assire, A

Michel, B

Raous, M

机构：

[1] Equipe MMC, CNRS, LMA, F-13402 Marseille 20, France

[2] CEA, CADARACHE, LECC,SERSI, DER, F-13108 St Paul Durance, France

来源：

NUCLEAR ENGINEERING AND DESIGN | 2001年 / 206卷 / 01期

关键词：

Crack initiation - Crack propagation - Creep - Finite element method - Numerical analysis - Structural analysis - Welds;

D O I：

10.1016/S0029-5493(00)00387-3

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

In this study, creep crack initiation and creep crack growth in welded structure are analysed. An interaction phenomenon between base metal and weld metal in a cross weld plate is highlighted with a finite element model. A simplified method based on the reference stress approach is proposed to evaluate C* in welded structures. This simplified method is applied for creep crack initiation and creep crack growth assessments in the case of a double edge notched tension cross-welded plate, Correlations between crack initiation time and C* on the one hand, and between creep crack growth rate and C* on the other hand are used. Creep crack initiation time estimation for the full size welded plate is very conservative when crack initiation properties of CT specimen are used. Concerning creep crack growth evaluation, simplified estimation is in good agreement with experimental results when CT specimen crack propagation properties are used. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：45 / 56

页数：12

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