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신영우(Y. W. Shin) 한국동력기계공학회 2005 한국동력기계공학회 학술대회 논문집 Vol.- No.-
Graphites is well known as a material which has high-temperature thermostable property, chemical resistance against acid and alkaline state also is very easy to environment. Nowadays the need of graphites product is increasing rapidly because of its advantages. In this paper, the mechanical property of newly developed graphite products with high density is investigated with especially in compression test. I introduced the graphite specimens for this study by NGF method with two expandable graphite and compared to the specimens of commercial graphite sheet from expanded graphite which made by the rolling process. I investigated the characteristics of these materials by measuring specific weight, hardness, compressive strength and investigating structures by SEM, It is verified that the graphite products with NGF method has superior properties for using gasket materials than that of commercial graphite sheet.
신영우(Y. W. Shin) 한국동력기계공학회 2005 한국동력기계공학회 학술대회 논문집 Vol.- No.-
Thermostable property is one of most important characteristics of graphite. Commercial graphites sheet from expanded graphite is using for high-temperature elements. Nowadays the new plant with high performance is developed in field of chemical industries, so the need of graphites is increasing rapidly. In this paper, the thermostable properties of newly developed graphite products with high density is investigated. I introduced the graphite material which developed for these heat tests by NGF method in order to test thermostable properties by comparing to the results of the commercial graphite sheet from expanded graphite in same condition. Through measuring the weight reducing ratio with various specimens in some conditions, I investigated the thermostable characteristics of these materials. It is verified that the graphite products by NGF method has almost same or superior thermostable properties comparing with that of commercial graphite sheet. Also the graphite products by NGF method have possibility of being better in thermostable properties.
이음매없는 압력 용기 제작을 위한 다단 드로잉 금형 설계에 관한 연구
신보성(B.S.SHIN),최두선(D.S.CHOI),신영우(Y.W.SHIN) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.11_1
In this paper, we will discuss the die design of multi-stage drawing for large size cylindrical shells with multi thickness wall sections such as straight, stepped, tapered sides. These shells are achieved by our continuous deep drawing process. This process required no in-process annealing. But after cold working. These shells is performed heat treatment. These shells are used for the making of seamless LPG pressure vessels after the spinning process. This process is composed of deep drawing, reverse redrawing, drawingironing and several ironing processes.
조태승,신영우,김희범,한만봉,김민관,배동한 순천향대학교 1993 논문집 Vol.16 No.4
Sacrococcygeal teratomas are not only the most common teratomas, they are also the most common neoplasm in the newborn. But the incidence is very rare. The imprtance of these tumors is derived from the fact that delay in diagnosis or inadequate surgical treatment of these lesions result in malignancy. We have met a case of large solid sacrococcygeal teratoma of fetus recently. In this paper, a case of large sacrococcygeal teratoma is reported with brief review of the literature.
한만봉,이금원,신영우,조태승,배동한 순천향대학교 1993 논문집 Vol.16 No.2
Chorioangioma is the most common primary tumor of the human placenta. Hydramnios, toxemia, preterm delivery and antepartum hemorrhage are common as maternal complication. We have had an experience of a case of chorioangioma with hydramnios and report the case with review of literatures briefly.