Microstructure-dependent fatigue damage process in short fiber reinforced plastics

M. Nishikawa, T. Okabe

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

This paper proposes a numerical model of the fatigue damage process in short fiber-reinforced plastics. In the fatigue fracture of these composites, the microcracks in the polymer matrix increase with fatigue cycles and dominate the fatigue damage process. Therefore the matrix crack was modeled by the continuum damage mechanics approach while considering the microscopic fatigue damage process in the polymer matrix based on a Kachanov-type damage-evolution law. We applied the model to addressing the fatigue-cycle experiments of short glass-fiber reinforced polycarbonate conducted by Ha et al. The simulated results agreed well with the experimental results. Moreover, the simulation revealed that the dependence of the damage accumulation on the fiber orientation remarkably changes the fatigue life of the short glass-fiber reinforced plastics.

Original languageEnglish
Pages (from-to)398-406
Number of pages9
JournalInternational Journal of Solids and Structures
Volume47
Issue number3-4
DOIs
Publication statusPublished - 2010 Feb

Keywords

  • Composite materials
  • Damage mechanics
  • Fatigue
  • Matrix crack
  • Short fiber

ASJC Scopus subject areas

  • Modelling and Simulation
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Applied Mathematics

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