Proceedings of the KSME Conference (대한기계학회:학술대회논문집)

The Korean Society of Mechanical Engineers (대한기계학회)
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A Study on the Analysis of Fatigue-fractured Surface of Aluminium for Aircraft

항공기용 Al의 피로파면 분석에 관한 연구

  • 주원경 (창원대학교 메카트로닉스공학부) ;
  • 권용구 (창원대학교 메카트로닉스공학부) ;
  • 배성인 (창원대학교 메카트로닉스공학부) ;
  • 송정일 (창원대학교 메카트로닉스공학부)
  • Published : 2007.05.30
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Abstract

The purpose of this study is to analyze the important loads related with crack-growth in aircraft. Al Alloys mainly used in aircraft are Al2024 and Al7075 in Duralumin. In random fatigue loading, it has been understood crack-growth characteristic using fractured surface photograph by SEM. In order to obtained CTOD, we measured a crack size in wing frame part. As a result of fatigue experiment that accumulating plenty of fatigue loadings, we find more cracks than that produces in the same fatigue loading. The important loads relating to crack-growth was found in the largest strain cycle. Applying strain block in fatigue experiment, it is actually loading in connection of aircraft. In conclusion, These results can be used for preventing an accident owing fatigue-fracture in aircraft.

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