A critical shear displacement criterion for ductile-brittle transition under mixed mode I and II loading

被引：6
作者：
Bhattacharjee, D. [1 ]
Knott, J. F.
机构：
[1] Tata Steel Ltd, R&D Sci Serv, Jamshedpur 831001, Bihar, India
[2] Univ Birmingham, Inst Met & Mat, Sch Engn, Birmingham B15 2TT, W Midlands, England
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2007年 / 23卷 / 11期
关键词：
mixed mode fracture; HY100; steel; ductile-brittle transition; shear strain criterion;
D O I：
10.1179/174328407X192886
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Micromechanisms producing ductile and brittle damage operate in parallel at a crack tip. The dominant mode of failure depends upon which of the two ( ductile or brittle) damage parameters first reaches its critical value. This has been shown by a study of ductile-brittle transition behaviour in HY100 steel under mixed mode I and II loading. The transition from ductile to brittle behaviour in HY100 steel was found to be affected by mixed mode I and II ratio ( ratio of imposed tensile and shear loading) in a manner such that with increasing shear the transition temperature decreased. In the present paper, a criterion is proposed based on the shear strain ahead of a notch tip, to predict the fracture behaviour at any given temperature and mixed mode ratio.
引用
收藏
页码：1269 / 1277
页数：9
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