Evaluation of the interfacial properties in polymer matrix composite: Experiments and elasto-plastic shear-lag analysis

Souta Kimura, Jun Koyanagi, Takayuki Hama, Hiroyuki Kawada

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

An energy-based analysis has been developed to evaluate interfacial adhesion between fiber and matrix in a single fiber composite over the years. However, the value of the energy-based parameter, e.g. an energy release rate, depends on a stress distribution predicted by a model employed. In the case of carbon fiber-reinforced plastics (CFRP), laser Raman spectroscopy (LRS) is significantly effective to validate the stress distribution predicted. The fragmentation tests with a model of carbon fiber-reinforced epoxy composite are performed, and LRS is used to detect a distribution of the fiber axial strain. An elasto-plastic shear-lag analysis methodology is employed, and a stress distribution is predicted under various approximations of s-s curve of the matrix resin and compared with the experimental results. Our recent energy-balance method, including an energy dissipation induced by plastic deformation around an interfacial debonding tip, is used to calculate an energy release rate to initiate an interfacial debonding (interfacial energy). An effect of the difference between the approximations on the value of the interfacial energy is discussed.

Original languageEnglish
Pages (from-to)167-172
Number of pages6
JournalKey Engineering Materials
Volume340-341 I
DOIs
Publication statusPublished - 2007 Jan 1

Keywords

  • Elasto-plastic shear-lag analysis and LRS
  • Fragmentation test
  • Interfacial debonding

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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