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오늘 본 자료
심우성(Woosung Shin),김재훈(Jaehoon Kim),이영신(Youngshin Lee),차기업(Kiup Cha),홍석균(Sukkyun Hong) 한국추진공학회 2008 한국추진공학회지 Vol.12 No.4
In manufacturing aircraft, safety and lightness of structure are important factors. Utilizing autofrettage technique, these benefits can be obtained. This technique is most frequently applied to a single cylinder. However, the Bauschinger effect reduces the benefits of autofrettage process Therefore, there is increasing interest in the use of compound cylinder that combine shrink fit and autofrettage. In this paper, single and compound cylinders that has same geometry were considered. It was found that compound cylinder which was autofrettaged has lower tangential hoop stress and plastic strain than single cylinder at bore. This means a reduction in the impact of the Bauschinger effect after shrink-fitting which produces the beneficial bore hoop stress.