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- W1695260290 abstract "항공기 주구조에 많은 부분은 겹침이음 형태의 조립구조이며 이러한 구조는 프레팅 손상으로 인해 단순피로에 비해 현저히 수명이 감소된다. 특히 노후 항공기의 경우 프레팅 피로균열은 감항안전을 저해하는 중요한 요인으로 최근 대두된 수명연장 문제와 관련해서도 손상허용성 평가에 프레팅 피로수명 예측이 필수적으로 요구되고 있다. 이러한 배경으로 본 연구에서는 볼트 체결력이 서로 다른 겹침이음 구조시편에 대하여 일련의 프레팅 피로시험을 수행하고 탄소성 접촉응력 유한요소해석 결과로부터 프레팅 파라미터를 구하고 균열발생 및 성장 수명예측 모델식과 최근 제안된 수정 모델식을 통하여 프레팅 피로수명을 예측하였다. 또한 시험결과와 비교분석함으로써 실제 항공기 겹침이음 구조에 프레팅 피로수명 예측 모델식의 적용 유효성을 고찰하였다. Most of lap jointed aircraft structures encounter the fretting damages, which provoke fretting cracks prematurely and lead to significant reduction of fatigue life. In the case of ageing aircrafts especially, this fretting fatigue problem is a fatal threat for the safety and airworthiness. Recently, as the service life extension program(SLEP) of ageing aircrafts has become a hot issue, the prediction of fretting fatigue life is also indispensable. On these backgrounds, a series of experimental tests of fretting fatigue on bolted lap joint specimens, were performed. And the fretting crack initiation and propagation life of each specimen were evaluated using existing and newly proposed prediction models with the fretting parameters obtained from the FEA results for elasto-plastic contact stress analyses. The validations of prediction models were also discussed, comparing the prediction results with experimental test ones." @default.
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- W1695260290 date "2009-07-01" @default.
- W1695260290 modified "2023-09-27" @default.
- W1695260290 title "Prediction of Fretting Fatigue Life for Lap Joint Structures of Aircraft" @default.
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- W1695260290 doi "https://doi.org/10.5139/jksas.2009.37.7.642" @default.
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