Delamination propagation in a multi-directional woven composite DCB specimen subjected to fatigue loading

Chaim Ishbir, Leslie Banks-Sills, Victor Fourman, Rami Eliasi

Research output: Contribution to journalArticlepeer-review

Abstract

Double cantilever beam (DCB) specimens fabricated from a graphite/epoxy (G0814/913) woven prepreg containing a straight through notch were tested by means of constant amplitude fatigue. The specimen was composed of 15 layers with fibers alternating between the weft and warp in the 0°/90° and the +45°/-45° directions. Eight fatigue tests were carried out to determine the delamination growth rate da/dN vs the nearly mode I cyclic energy release rate ΔGI. Comparison of the delamination growth rate was made to the crack propagation rate of an aluminum alloy. It was found that a crack in the aluminum will grow faster but will be less sensitive to uncertainties or changes in load level.

Original languageEnglish
Pages (from-to)180-189
Number of pages10
JournalComposites Part B: Engineering
Volume66
DOIs
StatePublished - Oct 2014

Keywords

  • A. Fabrics/textiles
  • A. carbon fiber
  • B. Delamination
  • B. Fatigue

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