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김병호,전상훈,Kim, Byeong-Ho,Jeon, Sang-Hun 대한흉부심장혈관외과학회 1995 Journal of Chest Surgery (J Chest Surg) Vol.28 No.1
Hiatal hernia is a rare disease in Korea compared to western countries. It is even rarer to find the one that requires operation after unsuccessful medical treatments. We operated three cases of hiatal hernia with gastroesophageal reflux by Belsey-Mark IV procedure. One case developed paraesophageal hernia postoperatively and we performed laparotomy to correct the complication. Postoperatively, all three cases showed satisfactory results clinically and radiographically.
자주포 발전기 스플라인 축 내구성 향상을 위한 최적 설계 기법
김병호,강현제,박영일,서재현,Kim, Byeong Ho,Kang, Hyen Jae,Park, Young Il,Seo, Jae Hyun 한국군사과학기술학회 2015 한국군사과학기술학회지 Vol.18 No.5
In this study, the experimental and analytical investigation on structural integrity evaluation of spline shaft of self propelled artillery' generator were carried out. For this work, macro and microstructure fractography of spline shaft were observed. According to the results of the structure analysis and simulation, the shaft was redesigned and optimized. To improve the stiffness and shear stress, the material was changed from the SNCM220 to SNCM439 and surface roughness and protective coating treatment are changed to increase the stress relaxation, respectively. From the result of the torsion test of shaft and accelerated life test of generator, the shaft of a SNCM439 with heat-treatment(Q/T) and electroless nickel plating was superior quality reliability and durability than the others. Therefore, modeling and simulation corresponded well with the experimental result and structural safety was confirmed by generator performing.