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삼성분계 THF + 3-OH THF + CH<sub>4</sub> 크러스레이트 하이드레이트의 상평형 거동 해석 및 분광학적 분석
김희중 ( Heejoong Kim ),안윤호 ( Yun-ho Ahn ),문석윤 ( Seokyoon Moon ),홍수진 ( Sujin Hong ),박영준 ( Youngjune Park ) 한국화학공학회 2017 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.55 No.3
In this study, the inclusion phenomena of tetrahydrofuran + 3-hydroxytetrahydrofuran + CH<sub>4</sub> clathrate hydrates were explored via thermodynamic and spectroscopic approaches. The phase equilibria of the double hydrates - THF + CH<sub>4</sub> and 3-OH THF + CH<sub>4</sub> clathrate hydrates - were determined by pressure-temperature trace during hydrate formation and dissociation, and the result revealed that the equilibrium pressures were shifted to lower pressure region compared to pure CH<sub>4</sub> hydrate. The powder X-ray diffraction patterns revealed that the double hydrates of THF + 3-OH THF formed structure II type clathrate hydrates with CH<sub>4</sub>. The dispersive Raman spectra of the double clathrate hydrates also exhibited that CH<sub>4</sub> can be trapped in both 5<sup>12</sup>6<sup>4</sup> and 5<sup>12</sup> cages whereas THF and 3-OH THF were encaged in 5<sup>12</sup>6<sup>4</sup> cage.
도어트림 SHARP EDGE 예측을 위한 전면 충격 시험법 연구
김종수(Jongsoo Kim),조현권(Hyunkwon Jo),김희중(Heejoong Kim),박현민(Hyunmin Park),강두안(Dooan Kang) 한국자동차공학회 2014 한국자동차공학회 학술대회 및 전시회 Vol.2014 No.11
As times goes by, the viewpoint of the vehicle purchase consumers is on the increase. Because of the fact that the number of car accident casualties through the various boradcast media is announced, Above all, they take an active interest in vehicle safety. A safety is directly connected to vehicle crash and especially, The Side impact is extremely influenced on the driver’s injury. in case of side impact, Sharp edge which is caused by door-trim crack is directly injured to the driver. Therefore, car maker and door trim manufacture company are making an effort to pre-predict and improve sharp edge. In order to not only pre-predict sharp edge but also protect it, the repeated (real) vehicle crash test is the most accurate method, however, it isn’t effective in terms of time and cost that a large number of trial is conducted. For overcoming this problem In this paper, we propose a reliable testing methodology to pre-evaluate Door Trims for the chance of sharp edges occurring after impact, and show how to resolve the problem if it occurs before full-scale Car Side Impact test. This research leads to exact prediction of Door Trim sharp edge as full-scale Car Side Impact test.