Influence of elastic inclusion morphology and matrix hardening behavior on bauschinger effect in metal matrix composites |
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Authors: | Zhonghua Li S Schmauder A Wanner |
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Affiliation: | (1) the School of Civil Engineering and Mechanics, Shanghai Jiaotong University, 200240 Shanghai Minhang, People’s Republic of China;(2) the Staatliche Materialprüfungsanstalt (MPA), University of Stuttgart, D-70569 Stuttgart, Germany;(3) the Max-Planck Institute für Metallforschung, D-70174 Stuttgart, Germany |
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Abstract: | Finite element modeling based on axisymmetrical cells was performed for relating the Bauschinger effect (BE) in metal matrix
composites (MMCs) to the reinforcement volume fraction and shape, matrix hardening behavior, and plastic prestrain levels.
It was found that elastic inclusions in MMCs introduce a significant BE, which is ascribed to the residual phase stresses
in the component phases. The BE introduced by cylindrical inclusions is more significant than that of spherical ones and increases
rapidly with increasing the aspect ratio of the cylindrical inclusion. The volume fraction of the elastic inclusion has a
strong effect on BE. The hardening behavior of the matrix has a weak effect on BE. The BE increases with increasing plastic
prestrain level. |
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