Proceedings of the KSME Conference (대한기계학회:학술대회논문집)

The Korean Society of Mechanical Engineers (대한기계학회)
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A Experimental Study on the Fatigue Crack Growth Behavior of Thick Plate with Repaired Crack

보수된 균열을 가진 두꺼운 평판의 피로균열 성장 거동에 관한 실험적 연구

  • 정기현 (성균관대학교 대학원 기계공학부) ;
  • 양원호 (성균관대학교 기계공학부) ;
  • 김철 (성균관대학교 대학원 기계공학부) ;
  • 성기득 (구미1대학 컴퓨터응용기계설계과)
  • Published : 2001.11.01
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Abstract

An experimental investigation of the effect of composite patching repair was conducted to characterize the fatigue crack growth behavior in thick A16061-T6 (6mm) panels with single bonded patch by fiber reinforced composite patch. Four patch lengths and no patch plate were examined. An analytical procedure, involving three-dimensional finite element method having three layers to model cracked aluminum plate, epoxy by adhesive and composite patch, is calculated the stress intensity factors. From the calculated stress intensity factors, the fatigue crack growth rates are obtained. At the single patching type, different fatigue crack growth ratios through the plate thickness were investigated by using the experimental and analytical results. The results demonstrated that there was a definite variation in fatigue life depending on the size of composite patch. While crack reached the patch end, retardation of crack growth was also revealed in the bonded repair.

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