Strain-Rate-Dependent Failure of a Toughened Matrix Composite

J. D. Schaefer, B. T. Werner, I. M. Daniel

Research output: Contribution to journalArticlepeer-review

41 Scopus citations

Abstract

The strain-rate-dependent behavior of a toughened matrix composite (IM7/8552) was characterized under quasi-static and dynamic loading conditions. Unidirectional and off-axis composite specimens were tested at strain rates ranging from 10-4 to 103 s-1 using a servo-hydraulic testing machine and split Hopkinson pressure bar apparatus. The nonlinear response and failure were analyzed and evaluated based on classical failure criteria and the Northwestern (NU) failure theory. The predictive NU theory was shown to be in excellent agreement with experimental results and to accurately predict the strain-rate-dependent failure of the composite system based on measured average lamina properties.

Original languageEnglish (US)
Pages (from-to)1111-1120
Number of pages10
JournalExperimental Mechanics
Volume54
Issue number6
DOIs
StatePublished - Jun 2014

Keywords

  • Composites
  • Dynamic testing
  • Failure prediction
  • Strain rate dependence
  • Toughened matrix

ASJC Scopus subject areas

  • Aerospace Engineering
  • Mechanics of Materials
  • Mechanical Engineering

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