Experimental characterization of dynamic tensile strength in unidirectional carbon/epoxy composites

Norihiko Taniguchi, Tsuyoshi Nishiwaki, Hiroyuki Kawada

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

This study aims to characterize the dynamic tensile strength of unidirectional carbon/epoxy composites. Two different carbon/epoxy composite systems, the unidirectional T700S/2500 and TR50S/modified epoxy, are tested at the static condition and the strain rate of 100 s-1. A high-strain-rate test was performed using a tension-type split Hopkinson bar technique with a specific fixture for specimen. The experimental results demonstrated that both tensile strength increase with strain rate, while the fracture behaviors are quite different. By the use of the rosette analysis and the strain transformation equations, the strain rate effects of material principal directions on tensile strength are investigated. It is experimentally found that the shear strain rate produces the more significant contribution to strain rate effect on dynamic tensile strength. An empirical failure criterion for characterizing the dynamic tensile strength was proposed based on the Hashin's failure criterion. Although the proposed criterion is just the empirical formula, it is in better agreement with the experimental data and quite simple.

Original languageEnglish
Pages (from-to)139-156
Number of pages18
JournalAdvanced Composite Materials
Volume17
Issue number2
DOIs
Publication statusPublished - 2008 Jun 1

    Fingerprint

Keywords

  • Carbon/epoxy composite
  • Failure criterion
  • Impact behavior
  • Split Hopkinson bar
  • Tensile strength

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering

Cite this