• Title/Summary/Keyword: Fatigue Life Pre-diction

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Study on Fatigue Behavior of Carbon Fiber Reinforced Polyimide Composites (탄소섬유강화 복합적층판의 피로특성에 관한 연구)

  • 이창수;황운봉;한경섭;윤병일
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.15 no.1
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    • pp.49-60
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    • 1991
  • Fatigue behavior of carbon fiber reinforced polyimide composite materials was studied experimentally and analytically. The physical variables, such as cyclic displacements and hysteresis loop energy were observed during fatigue tests. Fatigue life of the investigated [0/90]$_{2S}$ laminates was predicted by H'||'&'||'H models which was proposed based on the fatigue modulus and resultant strain. The predicted fatigue life by H'||'&'||'H curves was reasonably close to the experimental data. Fractography study shows that fatigue failure mechanism of [0/90]$_{2S}$ laminated composite materials involves failure break, matrix tearing and fiber-matrix debonding as well as delamination of layers.