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충진된 폼의 밀도에 따른 CFRP 원형부재의 에너지 흡수특성
최주호(Juho Choi),차천석(Cheonseok Cha),정종안(Jongahn Jung),양인영(Inyoung Yang) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
In this study, one type of circular shaped composite tube was used, combined with reinforcing foam and without foam. Furthermore, CFRP(Carbon Fiber Reinforced Plastic) circular member manufactured from CFRP prepreg sheet for lightweight design. CFRP is an anisotropic material which is the most widely adapted lightweight structural member. The crashworthy behavior of circular composite material tubes subjected to static axial compression under same condition is reported in this paper. Test was executed in order to compare the results to the energy absorption and collapse shape. The collapse mode during the failure process were observed and analyzes. The behavior of polymetric foams to the tubes crashworthiness were also investigated.
Experimental Study on Fresh Water Generation System with Low Pressure Evaporation
정한식(Hanshik Chung),위보워(S. Wibowo),리야드(Md. Riyad Tanshen),최주호(Juho Choi),정효민(Hyomin Jeong) 한국마린엔지니어링학회 2010 한국마린엔지니어링학회 학술대회 논문집 Vol.2010 No.4
In this study, experiment of fresh water generation with effect of vacuuming in evaporator was conducted to investigate the effect of various parameters on pressure and temperature distribution inside evaporator, and fresh water or condensed vapor collected from the system. The results of this study show that temperature and flow rateof feed water to the evaporator, and orifice diameter are important factors affecting pressure and temperature inside evaporator, and amount of condensed vapor yield. Varieties of feed water temperature and flow rate are 40-80 0C and 200-400 ㎖/min respectively. From this study shows also that it is possible to use non-conventional energy sources such as lower pressure waste steam for heating feed water to the evaporator of fresh water generation system.