Prediction of tensile strength of discontinuous carbon fiber/polypropylene composite with fiber orientation distribution

M. Hashimoto, T. Okabe, T. Sasayama, H. Matsutani, M. Nishikawa

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

This study proposes the layer-wise method (LWM) as a new approach for predicting the tensile strength of discontinuous fiber-reinforced composites that have arbitrary fiber orientation angles. The LWM assumes the discontinuous fiber-reinforced composites are identical to laminates that are composed of unidirectional fiber-reinforced plies and have the same distribution of fiber angles over the entire laminate. We applied the LWM to discontinuous carbon fiber polypropylene composites and evaluated the effect of fiber length on tensile strength and fracture mode. Simulated results agreed well with those of experiments. In addition, we proposed a simple analytical model based on micromechanics. This analytical model can correctly evaluate the strength and the fracture mode as effectively as the LWM. We also compared these models with a rule of mixture considering the failure criterion of fiber breakage and examined the limitation of the rule of mixture in predicting composite strength.

Original languageEnglish
Pages (from-to)1791-1799
Number of pages9
JournalComposites Part A: Applied Science and Manufacturing
Volume43
Issue number10
DOIs
Publication statusPublished - 2012 Oct 1

Keywords

  • A. Discontinuous reinforcement
  • A. Polymer-matrix composites (PMCs)
  • B. Strength
  • Fracture mode analysis

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials

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