Numerical simulation for the microscopic damage and its influence on the macroscopic fracture properties in short-fiber reinforced plastic composites

M. Nishikawa, T. Okabe, N. Takeda

Research output: Contribution to conferencePaperpeer-review

Abstract

A numerical simulation is presented to discuss the microscopic damage and its influence on the strength and energy-absorbing capability of short fiber-reinforced plastic composites. The dominant damage includes matrix cracking and/or interfacial debonding, when the fibers are shorter than the critical length for fiber breakage. The simulation addresses the matrix cracking with a continuum damage mechanics (CDM) model and the interfacial debonding with an embedded process zone (EPZ) model. The fictitious edge effects on the fracture modes are successfully eliminated with the periodic-cell simulation. We investigated the effect of the material microstructure on the fracture modes in the composites. The simulated results clarified that the inter-fiber distance affects the breaking strain of the composites and the fiber orientation angle affects the positions of the damage initiation. These factors influence the strength and energy-absorbing capability of short fiber-reinforced composites.

Original languageEnglish
Publication statusPublished - 2008
EventUS-Japan Conference on Composite Materials 2008, US-Japan 2008 - Tokyo, Japan
Duration: 2008 Jun 62008 Jun 7

Other

OtherUS-Japan Conference on Composite Materials 2008, US-Japan 2008
Country/TerritoryJapan
CityTokyo
Period08/6/608/6/7

Keywords

  • Fiber-reinforced plastics
  • Finite-element method
  • Fracture
  • Micromechanics
  • Short fibers

ASJC Scopus subject areas

  • Ceramics and Composites

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