High strain rate compressive tests on woven graphite epoxy composites

Mohammad Reza Allazadeh, Sylvanus N. Wosu

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The behavior of composite materials may be different when they are subjected to high strain rate load. Penetrating split Hopkinson pressure bar (P-SHPB) is a method to impose high strain rate on specimen in the laboratory experiments. This research work studied the response of the thin circular shape specimens, made out of woven graphite epoxy composites, to high strain rate impact load. The stress-strain relationships and behavior of the specimens were investigated during the compressive dynamic tests for strain rates as high as 3200 s-1. One dimensional analysis was deployed for analytical calculations since the experiments fulfilled the ratio of diameter to length of bars condition in impact load experiments. The mechanics of dynamic failure was studied and the results showed the factors which govern the failure mode in high strain deformation via absorbed energy by the specimen. In this paper, the relation of particle velocity with perforation depth was discussed for woven graphite epoxy specimens.

Original languageEnglish
Pages (from-to)311-325
Number of pages15
JournalApplied Composite Materials
Volume18
Issue number4
DOIs
Publication statusPublished - 13 Aug 2011

Keywords

  • absorbed energy
  • composites material
  • compression test
  • high strain rate
  • P-SHPB
  • woven graphite epoxy

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