Mechanical properties of flat braided composite with flexible interphase

Asami Nakai, Akio Ohtani, Takeru Ohki, Toshiko Osada, Masaharu Iwamoto, Hiroyuki Hamada, Nobuo Takeda

Research output: Contribution to journalConference articlepeer-review

7 Citations (Scopus)

Abstract

Textile composites have been used extensively as industrial materials because of the excellent mechanical properties resulting from the continously oriented fiber bundle. In a study of the mechanical properties, it is important to consider the fiber/matrix interface property as for other composite materials. In a recent study, the fiber/matrix interface is regarded as an interphase that has its own material constants and thickness; consequently, the mechanical properties of a composite can be controlled by specifically designing the interphase. In this study, we applied this concept to braided composites with flexible resin as interphase for the purpose of designing the interphase. In a static tensile test, though there were no improvements in Noncut specimens (normal braided composites), but a Cut specimen (each side of the Noncut specimen was cut) with flexible interphase was improved in fracture load and displacement. The observation of the specimen edge was carried out and it was confirmed that the progress of debonding at the fiber bundle intersection was interrupted by a flexible interphase, and a matrix crack did not occur in the Cut specimen with flexible interphase. In a fiber bundle pull-out test, it was confirmed that debonding progressed not into the fiber/resin interface but into the flexible interphase in the specimen with flexible interphase, and the interfacial property at the fiber bundle intersection was improved.

Original languageEnglish
Pages (from-to)399-410
Number of pages12
JournalComposite Interfaces
Volume7
Issue number5-6
DOIs
Publication statusPublished - Jan 1 2001
Event7th Symposium on Intrfacial Material Science of Composites - Tokyo, Japan
Duration: Apr 26 1999Apr 28 1999

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Physics and Astronomy(all)
  • Surfaces, Coatings and Films

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