Micromechanical analysis of filamentary metal matrix composites under longitudinal loading

Emmanuel E. Gdoutos*, Dimitrios Karalekas, Isaac M. Daniel

*Corresponding author for this work

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

A two-material composite cylinder model (CCM) was considered for the study of the mechanical behavior at different temperatures of a fiber-reinforced silicon carbide/aluminum (SiC/Al) composite. An elastoplastic analysis of the model was performed in which the fiber was assumed to be linear elastic and the matrix elastoplastic with work-hardening. The analysis was based on the deformation theory of plasticity in conjunction with the von-Mises yield criterion. Experimental stress-strain curves of a SiC/Al composite were obtained at 24 and 288°C (75 and 550°F). The complete three-dimensional stress distribution in the composite using the CCM was determined. It was found that, in addition to longitudinal stresses, transverse stresses in both the fiber and the matrix were developed as a result of the different Poisson's ratios of the two materials. The transverse stresses, although much smaller than the longitudinal stresses, contributed to the plastic deformation of the matrix. The experimental stress-strain curves were favorably compared with the theoretical predictions.

Original languageEnglish (US)
Pages (from-to)168-174
Number of pages7
JournalUnknown Journal
Volume13
Issue number3
DOIs
StatePublished - 1991

ASJC Scopus subject areas

  • Ceramics and Composites
  • Polymers and Plastics
  • Materials Chemistry

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