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Particulate size effects in the particle-reinforced metal-matrix composites

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Abstract

The influences of particle size on the mechanical properties of the particulate metal matrix composite are obviously displayed in the experimental observations. However, the phenomenon can not be predicted directly using the conventional elastic-plastic theory. It is because that no length scale parameters are involved in the conventional theory. In the present research, using the strain gradient plasticity theory, a systematic research of the particle size effect in the particulate metal matrix composite is carried out. The roles of many composite factors, such as: the particle size, the Young's modulus of the particle, the particle aspect ratio and volume fraction, as well as the plastic strain hardening exponent of the matrix material, are studied in detail. In order to obtain a general understanding for the composite behavior, two kinds of particle shapes, ellipsoid and cylinder, are considered to check the strength dependence of the smooth or non-smooth particle surface. Finally, the prediction results will be applied to the several experiments about the ceramic particle-reinforced metal-matrix composites. The material length scale parameter is predicted.

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Authors and Affiliations

  1. LNM, Institute of Mechanics, Chinese Academy of Sciences, 100080, Beijing, China

    Wei Yueguang

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  1. Wei Yueguang
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The project supported by the National Natural Science Foundation of China (19891180, 19925211) and by the Chinese Academy of Sciences (KJ951-1-201) and “Bai Ren” plan

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Yueguang, W. Particulate size effects in the particle-reinforced metal-matrix composites. Acta Mech Sinica 17, 45–58 (2001). https://doi.org/10.1007/BF02487769

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  • DOI: https://doi.org/10.1007/BF02487769

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