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문바울(Pa Ul Mun),오중석(Joungseok Oh),박정후(Junghu Park),강동명(Dongmyeong Kang) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
The energy crisis have faced and the environmental problems have recently raised. In this situation, the interest in light-weight frame for small & medium sized bus. this work is to develop a composite frame which will be applicable to relatively small & medium sized bus. For this frame a high efficiency and light-weight frame was designed with the proposing structural design procedure and a light composite structure frame. In the structural analysis including load case study, stress, deformation and buckling anlysis wer performed using the Finite Element Method. In its manufacturing, ther was utilized the wet lay-up and the result compared with structural experiments and structural anlysis.
이민근(Min Geun Lee),정상원(Sang Won Chung),문바울(Pa Ul Mun) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12
The springback to the metal forming is one of the most important issues. The springback of high strength steel under U-bending has been studied for a material orientation in which U-bending process is presumed to have the highest forming. In the study, the effects of the variable on springback of U-bending depending on intrusion direction, forming speed and blank holding force are investigated. And numerical analyses are performed to predict the amount of springback and to analyze the results. Practical and physical meaning of the results are discussed.