대한기계학회논문집A (Transactions of the Korean Society of Mechanical Engineers A)

  • 제26권11호
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  • Pages.2383-2389
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  • 2002
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  • 1226-4873(pISSN)
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  • 2288-5226(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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홀 확장된 판재의 에지마진 변화에 따른 피로특성 연구

A Study on fatigue Properties with Different Edge Margin for Hole Expansion Plate

  • 이준현 (부산대학교 기계공학부) ;
  • 이동석 (부산대학교 대학원) ;
  • 이환우 (경남대학교 기계자동화공학부)
  • 발행 : 2002.11.01
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초록

This paper describes an experimental study on fatigue life extension by using cold working process in fastener hole of aircraft structure. Cold working process was applied for A12024-7351 specimens by considering the effect of edge margin on fatigue life. It is generally recognized that cold working process offers a protective zone around fastener hole of aluminum aircraft structure due to the residual compressive stresses which lead to retardation of crack growth. Thus this process provides the beneficial effect of increasing the fatigue life of the component. there by decreasing maintenance costs. It has also been successfully incorporated into damage tolerance and structural integrity programs. Cold working specimens were tested at constant amplitude peak cyclic stresses. Fatigue life of cold working specimen compared with that of specimen fabricated with base material. The increase of fatigue life for cold working specimen is discussed by both considering the effect of residual compressive stresses measured by X-ray diffraction technique and quantitative effect of edge margin.

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참고문헌

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