Compression fatigue failure of CFRP laminates with impact damage

Nobuhide Uda, Kousei Ono, Kazuo Kunoo

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69 Citations (Scopus)


The objective of this study is to investigate failure mechanisms of impact-damaged CFRP laminates subjected to compression fatigue. Two kinds of composite materials, UT500/Epoxy and AS4/PEEK, were used to examine the dependence of failure behavior on the material properties such as interlaminar toughness. Impact-induced delaminations in the UT500/Epoxy specimen were considerably larger than those in the AS4/PEEK specimen. The S-N curves for the UT500/Epoxy specimens with impact damage exhibited a similar tendency to those without impact. The impact-induced delamination in the UT500/Epoxy specimen grew widthwise to the free edge on the rear side of the specimen during the fatigue test. On the other hand, the AS4/PEEK specimens without impact exhibited a more steeply declining S-N curve than those with impact damage. The delaminations in the impacted AS4/PEEK specimen did not reach the free edge before the fatigue fracture.

Original languageEnglish
Pages (from-to)2308-2314
Number of pages7
JournalComposites Science and Technology
Issue number14
Publication statusPublished - Nov 2009

All Science Journal Classification (ASJC) codes

  • General Engineering
  • Ceramics and Composites


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