Tensile strength of unidirectional CFRP laminate under high strain rate

Norihiko Taniguchi, Tsuyoshi Nishiwaki, Hiroyuki Kawada

Research output: Contribution to journalArticle

64 Citations (Scopus)

Abstract

The tensile strength of unidirectional carbon fiber reinforced plastics under a high strain rate was experimentally investigated. A high-strain-rate test was performed using the tension-type split Hopkinson bar technique. In order to obtain the tensile stress-strain relations, a special fixture was used for the impact tensile specimen. The experimental results demonstrated that the tensile modulus and strength in the longitudinal direction are independent of the strain rate. In contrast, the tensile properties in the transverse direction and the shear properties increase with the strain rate. Moreover, it was observed that the strain-rate dependence of the shear strength is much stronger than that of the transverse strength. The tensile strength of off-axis specimens was measured using an oblique tab, and the experimental results were compared with the tensile strength predicted based on the Tsai-Hill failure criterion. It was concluded that the tensile strength can be characterized quite well using the above failure criterion under dynamic loading conditions.

Original languageEnglish
Pages (from-to)167-180
Number of pages14
JournalAdvanced Composite Materials: The Official Journal of the Japan Society of Composite Materials
Volume16
Issue number2
DOIs
Publication statusPublished - 2007 Mar 1

Keywords

  • CFRP
  • Failure criterion
  • Off-axis test
  • Split Hopkinson bar
  • Strain-rate effect
  • Tensile strength

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering

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