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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 11    No. 4    August 2001

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Effect of thermal residual stresses on
yielding behavior under tensile or
compressive loading of short fiber
reinforced metal matrix composite
DING Xiang-dong(丁向东)1,2, LIAN Jian-she(连建设)2,
JIANG Zhong-hao(江中浩)2, SUN Jun(孙 军)1

1. State Key Laboratory for Mechanical Behavior of Materials,
School of Materials Science and Engineering,
Xi′an Jiaotong University, Xi′an 710049, P.R.China;
2. College of Materials Science and Engineering,
Jilin University of Technology, Changchun 130025, P.R.China

Abstract:Using large strain two-dimension axisymmetric elasto-plastic finite element method and the modified law of mixture, the effects of thermal residual stresses on the yielding behavior of short fiber reinforced metal matrix composite and their dependencies on the material structure parameters (fiber volume fraction, fiber aspect ratio and fiber end distance) were studied. It is demonstrated that the stress-strain partition parameter can be used to describe the stress transfer from the matrix to the fiber. The variation of the second derivation of the stress-strain partition parameter can be used to determine the elastic modulus, the proportion limit, the initial and final yield strengths. In the presence of thermal residual stress, these yielding properties are asymmetric and are influenced differently by the material structure parameters under tensile and compressive loadings.

 

Key words: metal matrix composite; thermal residual stress; FEM; yielding behavior

ISSN 1672-7029
CN 43-1423/U

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