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압축 및 굽힘 붕괴 하에서의 알루미늄/유리섬유 복합재 사각 튜브의 에너지 흡수 특성
신금철(Kumcheol Shin),김구현(Koohyun Kim),송민철(Mincheol Song),이정주(Jungju Lee) 한국자동차공학회 2002 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2002 No.5_2
In this paper, energy absorption capability of axial crush and bending collapse of aluminum/GFRP hybrid tubes were investigated. Glass fiber-cpoxy composite prepregs were wrapped around an aluminum tube and then cured completely in the autoclave under the recommended cure cycle. Failure mechanisms of the hybrid tube wider the axial compressive load and the bending load were experimentally investigated. For calculating energy absorption capability of axial crush and bending collapse behaviors of the hybrid tube, the modified plastic hinge collapse model and the modified Kecman's model for hybrid tube were suggested, respcctively. Two suggested models for the hybrid tube showed a good agreement with the experimental results.<br/>
알루미늄/GFRP 혼성 사각튜브의 정적 압축 붕괴 및 에너지 흡수 특성
김구현(Koohyun Kim),이정주(Jungju Lee),신금철(Kumcheol Shin) 한국자동차공학회 2000 한국 자동차공학회논문집 Vol.8 No.6
In this study, static axial crush tests were performed with the new aluminum/GFRP hybrid tube. Glass/Epoxy prepregs were wrapped around an aluminum tube and co-cured. The failure of the hybrid tube was stable and progressive without trigger mechanism, and specific energy absorption was increased to the maximum of 33% in comparison with the aluminum tube. Effective energy absorption is possible for an inner aluminum tube because a wrapped composite tube constrains the deflection of an aluminum tube. The failure of a hybrid composite tube was stable without trigger mechanism because the inner aluminum tube could play the role of the crack initiator and controller. Mean crushing load could be calculated by modifYing the plastic hinge collapse model for hybrid materials. The predicted results by this analytical model showed good agreement with the experimental results. It can be said that Aluminum/Glass-Epoxy hybrid tube is suitable for the vehicle front structure because this hybrid tube shows effective energy absorption, easy production, and simple application capability for RTM process.