Evaluation of initiation of the interfacial debonding in single fiber composite (Energy balance method considering an energy dissipation of the plastic deformation)

Souta Kimura, Jun Koyanagi, Hiroyuki Kawada

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13 Citations (Scopus)


Fiber-matrix interfacial adhesion in composites is traditionally evaluated by means of a stress-based parameter. Recently, an interfacial energy parameter is suggested to be a valid alternative. However, the energy-based approaches overestimated the energy release rate to initiate the interfacial debonding (interfacial energy), since the plastic deformation in the vicinity of the debonding was neglected for simplicity. An effect of the plastic deformation on the interfacial energy of a fiber-reinforced polymer matrix composite is studied to evaluate the initiation of the interfacial debonding. The fragmentation tests with a model of glass fiber-reinforced vinylester matrix composite were performed, and the interfacial energy with the energy balance method taking into account an energy dissipation of the plastic deformation was calculated. The following results are confirmed; the plastic deformation has a significant influence on the interfacial energy, and the energy balance scheme taking into account the plastic energy dissipation leads to the constant interfacial energy without reference to the amount of the released potential energy. The differences between our model and the previous one are discussed.

Original languageEnglish
Pages (from-to)451-457
Number of pages7
JournalJSME International Journal, Series A: Solid Mechanics and Material Engineering
Issue number3
Publication statusPublished - 2006 Dec 1



  • Energy balance method
  • Interfacial energy
  • Plastic deformation and fragmentation test

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanical Engineering

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