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Size effect in particulate metal matrix composites: an analytical approach

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Abstract:

This study briefly reviews various existing methods to account for the effect of particle size on the mechanical properties of particulate metal matrix composites. A simple and easy method is to use a size-dependent constitutive equation for the matrix. The suggested method does not require the development of a new computational algorithm and is compatible with any standard finite element software. Finite element analyses have been carried out to show how the deformation behavior of a metal matrix composite changes as the particle size and volume fraction are varied. The strain hardenings in metal matrix composites are increased with smaller particles and larger volume fractions which could not be predicted with size-independent constitutive relation. It has been shown that the suggested method can be used in a common finite element analysis process to account for the size effect of composite strengthening.

Keywords: FINITE ELEMENT ANALYSIS; MATERIAL LENGTH SCALE; METAL MATRIX COMPOSITE; PARTICLE SIZE EFFECT

Document Type: Research Article

DOI: http://dx.doi.org/10.1163/156855106777873888

Publication date: July 1, 2006

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