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[구조강도부문] 에너지흡수제어기에 의한 박육원통부재의 압궤특성
김영남(Youngnam Kim),기경서(Kyoungseo Ki),강종엽(Jongyup Kang),차천석(Cheonseok Cha),김선규(Sunkyu Kim),양인영(Inyoung Yang) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this paper, static and impact collapse test of thin-walled circular tube member is performed under axial collapse load. Static tests have been carried out using the static testing machine(lnstron 8801) and dynamic tests have been utilized using an horizontal crushing testing machine. The energy absorption characteristics is observed according to the controller, height of the controller, clearance between specimen and controller. As a result, it was clear that the energy absorption characteristics of circular tubes were influence by the controller, height, clearance.
김영남(Youngnam Kim),조영재(Youngjea Cho),김성훈(Seunghoon Kim),이길성(Kilsung Lee),양인영(Inyoung Yang) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This paper is to study the effects of curvature and staking sequence on the penetration characteristics of composite laminated shell. And we were performed to investigate the penetration characteristics of composite laminated shells by the oblique impact. Composite laminates used in this test are CFRP orthtropic laminated plates, which are stacked with two-interfaces [0₃/90₃] sand [0₂/90₃/0] s. They are manufactured to varied curvature radius (R=100, 150, 200㎜ and ∞). They are cured by heating to the appropriate hardening temperature(130˚) by mean of a heater at the vacuum bag of the autoclave. Test specimens were prepared with dimensions 100㎜ x 140㎜. When the specimen is subjected to transverse impact by a steel ball, the velocity of the steel ball was measured both before and after impact by determining the time for it to pass two ballistic -screen sensor located a known distance apart. In general, the critical penetration energy increased as the curvature increased, interface decrease and slope angle on the impact surface increased.