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냉연재 권취공정의 메커니즘 규명 및 유한요소해석 모델 개발
박규태(K.T.Park),박용희(Y.H.Park),김경석(K.S.Kim),원성연(S.Y.Won),홍완기(W.K.Hong),천명식(M.S. Chun),박현철(H.C.Park) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11
In the thin strip coiling process, it is necessary to use the sleeve with mandrel to prevent the excessive deformation of the strip. And stress distribution in the sleeve and strip is important factor to determine the size of sleeve. However, experimental approach is almost impossible because of accumulation of high pressure. In this study, the finite element model for the strip coiling process was developed. Also, the radial and hoop stress on the sleeve and strip were investigated. Theoretical values and analysis result in an idealized conditions were compared for verification of the finite element model. Using the FE analysis, effects of strip thickness on the stress distribution and stress concentration was investigated. The result shows the radial stress increased by 6.3 times near the coil starting point. The radial stress increased by 3.2㎫ compared to previous model with the stacked thickness of 90 mm that corresponds to weight of 2959 layers of 1 mm thickness strip.