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

Norihiko Taniguchi*, Tsuyoshi Nishiwaki, Hiroyuki Kawada

*この研究の対応する著者

研究成果査読

6 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)139-156
ページ数18
ジャーナルAdvanced Composite Materials
17
2
DOI
出版ステータスPublished - 2008 6 1

ASJC Scopus subject areas

  • セラミックおよび複合材料
  • 材料力学
  • 機械工学

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