Fatigue damage behaviors of carbon fiber-reinforced epoxy composites containing nanoclay

Shafi Ullah Khan, Arshad Munir, Rizwan Hussain, Jang Kyo Kim

Research output: Contribution to journalArticlepeer-review

107 Scopus citations

Abstract

The effects of nanoclay inclusion on cyclic fatigue behavior and residual properties of carbon fiber-reinforced composites (CFRPs) after fatigue have been studied. The tension-tension cyclic fatigue tests are conducted at various load levels to establish the S-N curve. The residual strength and modulus are measured at different stages of fatigue cycles. The scanning electron microscopy (SEM) and scanning acoustic microscopy (SAM) are employed to characterize the underlying fatigue damage mechanisms and progressive damage growth. The incorporation of nanoclay into CFRP composites not only improves the mechanical properties of the composite in static loading, but also the fatigue life for a given cyclic load level and the residual mechanical properties after a given period of cyclic fatigue. The corresponding fatigue damage area is significantly reduced due to nanoclay. Nanoclay serves to suppress and delay delamination damage growth and eventual failure by improving the fiber/matrix interfacial bond and through the formation of nanoclay-induced dimples.

Original languageBritish English
Pages (from-to)2077-2085
Number of pages9
JournalComposites Science and Technology
Volume70
Issue number14
DOIs
StatePublished - 30 Nov 2010

Keywords

  • A. Carbon fiber
  • A. Nanoclay
  • B. Fatigue
  • B. Interfacial strength
  • C. Damage tolerance

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