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- 저자 : 안대식 ( An Dae Sig ) (검색결과 2 건)
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안대식,민병국 충주대학교 산업대학원 2001 大學院論文輯 Vol.2 No.-
For making economical and practical automotive, there are lots of research related to lightening the weight and more safety chassis. In the case of the single hatted-section tube specimen being used as the most vehicle structural member, at the moment of vehicle crush, the passenger will be in front of severe danger by the buckling of chassis. To avoid the buckling by first collision load and make the chassis have more power by absorbing the collision energy, the structure of chassis changed so that when crash occur, the chassis got a tensile force instead of compressive force. The result of experiments are 1. The load and displacement curve show that the first stage impact load in the direction of column can be reduced perfectly. 2. At compression, the absorbing energy quantity and the maximum buckling load are safety to each other. As a results of that relation, with the maximum buckling load can predict the absorbing energy quantity. The critical value of the thickness-width ratio is useful for predicting the compact mode but no good for predicting the absorbing energy quantity. 3. When the thickness of material is constant, the little cross sectional area which means that the critical value of the thickness-width ratio is bigger and which show good ability of the absorbing energy quantity. In all different size of materials, the tensile absorbing energy quantity is about 80-90% of the compression absorbing energy quantity. 4. The best recommended thickness of material is 1.0 ㎜ thickness and 50×50㎜, considering the material weight and the absorbing energy quantity.
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