Crack-tip constraint analysis of SENB specimen under creep condition

被引：4

作者：

Jiao, G. C. ^{[1
]}

Wang, W. Z. ^{[1
,2
]}

Tan, S. J. ^{[1
]}

Yu, C. ^{[1
]}

Liu, Y. Z. ^{[1
,2
]}

机构：

[1] Shanghai Jiao Tong Univ, Key Lab, Educ Minist China Power Machinery & Engn, Shanghai 200030, Peoples R China

[2] Shanghai Jiao Tong Univ, Gas Turbine Res Inst, Shanghai 200030, Peoples R China

来源：

JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY | 2015年 / 29卷 / 02期

关键词：

Constraint; Creep; Crack-tip field; Bending specimen; C(t)-A(2)(t)-M approach; FIELDS; DEFORMATION;

D O I：

10.1007/s12206-015-0110-5

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

A higher-order asymptotic C(t)-A (2)(t)-M approach was used to investigate the crack-tip stress of single edge notched bend (SENB) specimen in a power-law creeping material under plane strain conditions. Comprehensive calculations were made of SENB specimen with a/W = 0.59 by using higher-order asymptotic C(t)-A (2)(t)-M approach, higher-order asymptotic C(t)-A (2)(t) approach and finite element analysis; the latter two methods were used to check the constraint significance and the calculation accuracy of C(t)-A (2)(t)-M approach, respectively. The results show that the stress components sigma (theta theta) obtained from the higher-order asymptotic C(t)-A (2)(t)-M solution agreed well with that of finite element analysis, however, which gradually deviated from the results of C(t)-A (2)(t) approach as the distance far away from the crack tip for small-scale creep stage.

引用

页码：501 / 506

页数：6

共 23 条

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