Effect of matrix hardening on the tensile strength of alumina fiber-reinforced aluminum matrix composites

Tomonaga Okabe, Masaaki Nishikawa, Nobuo Takeda, Hideki Sekine

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

This paper examines the stress distribution around a fiber break in alumina fiber-reinforced aluminum matrix (Al2O3/Al) composites using finite element analysis and predicts their tensile strengths using tensile failure simulations. In particular, we discuss the effect of matrix hardening on the tensile failure of the Al2O3/Al composites. First, we clarify the differences in the stress distribution around a fiber break between an elastic-perfect plastic matrix and an elastic-plastic hardening matrix using finite element analysis. Second, the procedures for simulating fiber damage evolution in the Al2O3/Al composites are presented. The simulation incorporates the analytical solution to the stress distribution of a broken fiber in the spring element model for the stress analysis of the whole composite. Finally, we conduct Monte Carlo simulations of fiber damage evolution to predict the tensile strength of the Al2O3/Al composites. Coupled with a size-scaling analysis, the simulated results express the size effect on the strengths of the composites seen in experimental results.

Original languageEnglish
Pages (from-to)2557-2566
Number of pages10
JournalActa Materialia
Volume54
Issue number9
DOIs
Publication statusPublished - 2006 May 1

Keywords

  • Alumina fiber
  • Aluminum
  • Metal matrix composites
  • Plastic deformation
  • Simulation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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