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원종진(C.J.Won),이종선(J.S.Lee),홍석주(S.J.Hong) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.5_2
The objective of this study is to investigate effects of prebuckling on the buckling of laminated composite cylindrical shells. Axial compression and lateral pressure are considered for laminated composite cylindrical shells with length to radius ratios. The shell walls are made of a laminate with several symmetric ply orientations. the study was made using finite difference energy method, utilizing the nonlinear bifurcation branch with nonlinear prebuckling displacements. The results are compared to the buckling loads determined when membrane prebuckling displacemnets are considered.<br/>
원종진(C.J.Won),이종선(J.S.Lee),이헌주(H.J.Lee) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.6_1
Experience and experiments show that in many cases the buckling limit is reached at a much smaller load level than is predicted by linear buckling analysis.<br/> In this paper, it is considered linear and nonlinear of plane vehicle structure and estimates design sensitivity of the cross sectional area that is composed plane vehicle structure and performs optimal design. It compares linear vehicle structure with nonlinear vehicle structure for optimal design result that is selected constraint condition of buckling load.<br/>
김천욱(C.W.Kim),한병기(B.K.Han),원종진(C.J.Won),임채홍(C.H.Lim) 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.6_2
This paper investigates the energy absorption characteristics of thin-walled rectangular tubes. In the compact mode, the crushing process of a thin-walled tube is analyzed into 3 parts by the ratio of outward to inward fold length. The mean crush load and the half wave fold length are determimed by using minimum energy principle. The effective crush distance and the number of folds are derived and the energy absorption capacity can be estimated, which are proved experimentally.