Effects of the fiber content on the longitudinal tensile fracture behavior of uni-directional carbon/epoxy composites

Heru S B Rochardjo, Jun Komotori, Masao Shimizua, Yasushi Miyano

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This study is concerned with the effects of the fiber content on the macroscopic and macroscopic fracture mode of unidirectional carbon/epoxy composite. Necked-on-thickness specimens having a fiber volume fraction (Vf) ranging from 30 to 70% were tested in tension in the fiber direction. The effects of the fiber volume fraction on the fracture appearance were then examined. The results show that a transition in fracture mode occurred, from tensile fracture at the necked region at low Vf to interlaminar shear failure at high Vf. Fracture-mode transition also occurs at the microscopic level. Examination of SEM photomicrograph of the specimen surface shows that, at low Vf, the specimen fractured in fiber-break dominated fracture, whilst, at high Vf, interfacial-damage dominated fracture was observed. An analysis to determine the conditions for the occurrence of each fracture mode is presented.

Original languageEnglish
Pages (from-to)89-93
Number of pages5
JournalJournal of Materials Processing Technology
Issue number1-3
Publication statusPublished - 1997 May



  • Carbon/epoxy composite
  • Fiber content
  • Tensile fracture

ASJC Scopus subject areas

  • Materials Science(all)

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