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박상국(SangGuk Park),김정호(JungHo Kim),정종안(JongAn Jung),심재기(JeaKi Sim),양인영(InYoung Yang) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this paper CFRP composite materials widely used as structural materials for airplanes, ships and aero space vehicles because of their high strength and stiffness. Autoclave forming of CFRP process is the most commonly used method of applying heat and pressure simultaneously. This process is suitable for the structural aerospace and military applications which needs a high mechanical properties assisted by removal of trapped air or other volatiles. This study aims to investigate the effects of stacking sequence and distance on the penetration characteristics of CFRP laminated plates. They are stacked to [0₃/90₃]s, [0₂/90₃/0]s, [0/90₂/0₂/90]s, and their interlaminar numbers are two and six. They are distance to 0㎜ ~ 30㎜, and their real distance are 100㎜ ~ 300㎜. Composite laminated plates of dimensions 180㎜ × 180㎜ were prepared. The velocity of the steel ball that transversely impacts a specimen was measured both before and after impact by determining the time for the ball to pass two ballistic-screen sensors located at a known distance apart.
에너지 흡수 제어에 의한 Al 박육부재의 축 압궤 특성
양용준(Yongjun Yang),황창숙(Changsook Hwang),김선규(Sunkyu Kim),심재기(Jeaki Sim),양인영(Inyoung Yang) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Automobiles must be designed to control characteristics of energy absorption for the protecting of passengers in a car accident. Study on collapse characteristics of structural member is conducted in parallel with other studies on effective energy absorption capacity of structural members with diverse cross-sectional shapes and various materials. This study concerns the crashworthiness of the widely used vehicle structural members, thin-walled tubes, which are excellent on the point of the energy absorption capacity. The absorbed energy, mean collapse load and deformation mode were analyzed for side member which absorbs most of the collision energy. The Energy Absorption Capacity of AI thin-walled tubes have been estimated on cases of with-controller and without-controller, respectively based on height, thickness of an controller. The absorbed energy and mean collapse load of thin-walled tubes was increased by 15-20% in using the controller and energy absorbing capability of the specimen was slightly changed by change of the high controller's height.