Mechanical properties and failure characteristics of a recycled CFRP under tensile and cyclic loading

Mitsuhiro Okayasu, Tomohiro Yamazaki, Kohei Ota, Keiji Ogi, Tetsuro Shiraishi

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

An examination has been made of the mechanical and failure properties of a recycled short carbon fiber reinforced plastic (rCFRP). The rCFRP samples were fabricated by the following process: the CFRP, consisting of epoxy resin with carbon fiber, is ground before mixing with acrylonitrile butadiene styrene resin with different weight fractions of CFRP. The tensile strength (σUTS) increased with increasing CFRP content, but dropped considerably for the sample with higher fiber content. From in situ measurement of localized failure in rCFRP, it appeared that material failure occurs even if a low tensile stress of 30% σUTS is applied. The localized damage was related to the pull-out (or debonding) of the fibers from the matrix. The fatigue strength increased with increasing the content of the recycled carbon fiber even for the samples with low tensile strength. This was attributed to the low crack driving force arising from severe crack closure. Details of the crack growth behavior were discussed using various crack growth models proposed in previous studies.

Original languageEnglish
Pages (from-to)257-267
Number of pages11
JournalInternational Journal of Fatigue
Volume55
DOIs
Publication statusPublished - Aug 12 2013
Externally publishedYes

Keywords

  • CFRP Carbon fiber
  • Crack growth
  • Failure mechanism
  • Mechanical property
  • Recycled

ASJC Scopus subject areas

  • Modelling and Simulation
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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