A numerical analysis of the effects of reinforcement content on strength and ductility in Al/(SiC){sub p} MMCs

Journal Article · Fri Nov 01 04:00:00 EST 1996 · Acta Materialia

DOI:https://doi.org/10.1016/1359-6454(96)00063-8· OSTI ID:415435

Xu, X Q; Watt, D F ^[1]

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1. Univ. of Windsor, Ontario (Canada). Dept. of Mechanical Engineering

A numerical analysis, including elastic and elastic-plastic finite element analysis, has been used to examine the effects of reinforcement content on the strength and ductility of Al/(SiC){sub p} MMCs subjected to tensile loading. This study focuses on the relationships between reinforcement content and: (a) the stress gathering capability of particles; (b) the work hardening of the matrix; (c) the average and peak stress and strain in each phase; (d) the stored elastic energy density in each phase. It has been found that the increase in the stress gathering capability of the particles is a principal contributor to the nonlinear increase in the stiffness and strain hardening rate of the composites with increasing particle content. This stress gathering can lead to particle fracture. The hydrostatic stress and the peak normal strain in the matrix play an important role in some types of fracture observed in these composites, all of which are characterized by low ductility at high reinforcement content.

• OSTI ID: 415435
• Journal Information: Acta Materialia, Journal Name: Acta Materialia Journal Issue: 11 Vol. 44; ISSN 1359-6454; ISSN ACMAFD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM
COMPOSITE MATERIALS
CONCENTRATION RATIO
ELASTICITY
FINITE ELEMENT METHOD
PARTICULATES
PLASTICITY
SILICON CARBIDES
STORED ENERGY
STRAIN HARDENING
STRAINS
STRESSES
TENSILE PROPERTIES