Determination of interface properties from experiments on the fragmentation process in single-fiber composites

M. Nishikawa, T. Okabe, N. Takeda

Research output: Contribution to journalArticlepeer-review

78 Citations (Scopus)


This paper attempts to quantify the fracture properties (strength and toughness) of the fiber-matrix interface in composites, using the fragmentation process and debonding growth for HI-Nicalon™ SiC single-fiber and T300 carbon single-fiber epoxy (Bisphenol-A type epoxy resin with triethylenetetramine (TETA) as curing agent) composite systems. This method is based on the numerical modeling for the microscopic damage and fragmentation process in single-fiber composite (SFC) tests, with a cohesive zone model (CZM). For the HI-Nicalon™ SiC single-fiber epoxy composite in which the major damage near a fiber break is interfacial debonding, interface properties were reasonably determined as (TII,max, GIIc) = (75 MPa, 200 J/m2). In contrast, for T300 carbon single-fiber epoxy composite, we could not determine unique interfacial properties, since the variation of the cohesive parameters hardly affects the microscopic damage process due to the transition to the damage pattern dominated by matrix cracking.

Original languageEnglish
Pages (from-to)549-557
Number of pages9
JournalMaterials Science and Engineering A
Issue number1-2
Publication statusPublished - 2008 May 15


  • Cohesive zone model
  • Fiber-reinforced composites
  • Interfacial properties
  • Micromechanical modeling
  • Single-fiber composite test

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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