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유리/바살트/아라미드 섬유 복합재료의 적층구조에 따른 기계적 특성의 영향
허광현,방준호,송준희 한국기계기술학회 2021 한국기계기술학회지 Vol.23 No.4
In recent, fiber-reinforced composites have been widely used in many fields because of their excellent performance. In order to manufacture lightweight, high-performance, and inexpensive composites various laminated structures were designed. Six types of hybrid composites were fabricated with glass/basalt/aramid fibers by VARTM process. The effect of the laminated structure on the mechanical properties of composites was investigated through impact energy, tensile and bending strength. Compared to other conditions more higher impact energy was obtained when the aramid fibers were in the center position and more higher bending strength was obtained when the fibers are laminated in the order of increasing bending performance from top to bottom. The laminate structure did not affect tensile strength which mainly depends on the property of fibers.
적층 구조가 유리/바잘트/아라미드 섬유 복합재료의 기계적특성에 미치는 영향
허광현(Guangxian Xu),송준희(Jun Hee Song) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.6
최근 섬유강화 복합재료는 탁월한 성능으로 많은 분야에서 널리 사용되고 있다. 경량, 고성능이면서 가격이 저렴한 복합재료를 제조하기 위하여 다양한 적층 구조로 설계된 하이브리드 복합재료를 제조하였다. 유리/바잘트/아라미드 섬유로 VARTM을 사용하여 6가지 유형의 하이브리드 복합재료를 제작하였다. 인장, 굽힘강도와 충격에너지를 통하여 적층 구조가 복합재료의 기계적특성에 미치는 영향을 조사하였다. 충격과 굽힘에 우수한 아라미드섬유의 적층위치가 하이브리드 복합재료의 충격에너지와 굽힘 강도에 영향을 주었으나 인장 강도에는 영향을 주지 않는 것으로 발견 되었다. 아라미드섬유가 센터층에 위치하여 있을 경우 우수한 충격에너지를 얻었다.
허광현,남상욱,박일영,배두진,김경홍,송재경,이종학 啓明大學校 醫科大學 1994 계명의대학술지 Vol.13 No.2
Pregnancy in rudimentary uterine horn is very rate. We experienced a case of rudimentary uterine horn pregnancy with 15 week gestation. she was cured by excision of rudimentary uterine born and pertinent reference were reviewed briefly.
이종학,홍순도,남상욱,최종호,허광현,박일영 啓明大學校 醫科大學 1993 계명의대학술지 Vol.12 No.2
계명의대 산부인과에서 35세된 경산부에서 임신과 동반된 우측 난소의 자궁내막낭종의 성장과 파열을 경험하였기에 이에 문헌고찰과 함께 보고하는 바이다 Pregnancy had long been considered to have beneficial effect on endometriosis. During the pregnancy, extrauterine endomertrial tissues did not growth or enlarged because of physiologic amenorrhea and producing hormonal effect. However, we experienced a patient who underwent emergency exploratory laparotmy at gestation week 34/4 for rupture of an ovarian endometriotic cyst. The patient had a Cesarean section delivery of a 1,960gm female baby, who died at 1st day of life.
남상욱,송재경,최종호,홍순도,이종학,허광현,박일영 啓明大學校 醫科大學 1993 계명의대학술지 Vol.12 No.3
This study was undertaken to review the case series of 216 ectopic pregnancies admitted to the Department of Obstetrics and Gynecology, Pohang Sunrin Hospital from January, 1990 to December, 1991. The incidence of ectopic pregnancy was relatively high, being found to be 1 in 34.4 delivery cases. On the symptomatology, low abdominal pain was encountered in 96.8 percent, amenorrhea in 93.5 percent and vaginal bleeding in 16.2 percent in order. The fallopian tube was the most frequently, being found to be 98.6 percent, followed by the ovary with 0.9 percent and the cervix with 0.5 percent.