An assessment of the crack tip opening displacement criterion for predicting creep crack growth

被引：8

作者：

Xia, L

Hyde, TH

Becker, AA

机构：

[1] Department of Mechanical Engineering, University of Nottingham, Nottingham NG7 2RD, University Park

来源：

INTERNATIONAL JOURNAL OF FRACTURE | 1996年 / 77卷 / 01期

关键词：

D O I：

10.1007/BF00035369

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

From a set of finite element (FE) simulations of creep crack growth in compact tension specimens, the critical value of the crack tip opening displacement, CTOD, for creep crack growth has been generated for a Ni-base superalloy (Waspaloy) at 700 degrees C. It was found that the critical value is independent of the initial crack length, amount of previous creep crack growth and the load level. Hence, the CTOD seems likely to be a viable criterion for use in creep crack growth rate analysis. Good agreement was also obtained between the experimental test results and FE predictions of the creep crack growth with time and between the crack growth rate, da/dt, versus the C* parameter based on load-line displacement rate.

引用

页码：29 / 40

页数：12

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