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RISS 인기검색어
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박국남(Kook Nam Park),이정영(Chung Young Lee),지대영(Dae Young Chi),박수기(Su Ki Park),심봉식(Bong Sik Shim),안성호(Sung Ho Ahn),김학노(Hark Rho Kim),이종민(Jong Min Lee) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
FTL(Fuel Test Loop) is a facility that confirms performance of nuclear fuel at a similar irradiation condition with that of nuclear power plant. FTL consists of In-Pile Test Section (IPS) and Out-Pile System (OPS). FTL construction work began on August, 2006 and ended on March, 2007. During Construction, ensuring the worker's safety was the top priority and installation of the FTL without hampering the integrity of the HANARO was the next one. Task Force Team was organized to do a construction systematically and the communication between members of the task force team was done through the CoP(community of Practice) notice board provided by the Institute. The installation works were done successfully overcoming the difficulties such as on the limited space, on the radiation hazard inside the reactor pool, and finally on the shortening of the shut down period of the HANARO. Without a sweet of the workers of the participating company of HEC(Hyundae Engineering Co, Ltd), HDEC(HyunDai Engineering & Construction Co. Ltd), equipment manufacturer, and the task force team, it is not possible to install the FTL facility within the planned shutdown period. The Commissioning of the FTL is on due to check the function and the performance of the equipment and the overall system as well. The FTL shall start operation with high burn up test fuels in early 2008 if the commissioning and licensing progress on schedule.
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炭素纖維强化積層材의 破壞靭性에 대한 노치形狀 및 溫度의 影響에 關한 硏究
邕章祐,沈奉植,吳在脅 忠南大學校 産業技術硏究所 1989 산업기술연구논문집 Vol.4 No.2
An experimemtal study was carried out on the effect of notch radius, notch length, stacking sequence, notch orientation, specimen thickness and temperature to the fracture toughness of carbon / epoxy laminates. the fracture toughness is decrease with an increase of notch radius, notch length, temperature and specimen's thickness and the fracture toughness of the(0°/±45°/90°)s laminates is higher than the (0°/45°/90°/-45°)s laminates and 90°notch orientation is higher than 0°notch. Also, it is assumed that the effects of temperature are related with specimen's curing cycle temperature.
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WEL-TEN60 母材와 熔接材의 低溫 引張 및 衝擊特性에 關한 硏究
金載勳,沈奉植,邕章祐 忠南大學校 産業技術硏究所 1987 산업기술연구논문집 Vol.2 No.2
This study was aimed to determine tensile and impact properties of base and weld metals of WEL-TEN60 of temperatures from-70℃to 70℃. It is particularly important to assess tensile properties, absorbed energy change, lateral expension ratios and fracture appearance in order to prevent brittle fracture of this material at low temperatures. The obtained results were as follow: In case of base metal, the ultimate tensile strength, yield strength and elongation increase as the temperature decreases. The weld metal showed almost the same reactions as the base metal did. The fracture morphology of base and weld metals was that of dimple fracture at all temperature ranges. The dimple size got smaller as the temperature decreased. The fact that as the temperature increased, the absorbed energy increased seemed due to the increase of loading time. The curves of fibrous fracture, lateral expansion and absorbed energy kept almost the same shape. We came to conclusion that when we applied 15 ft-1b CVN temperature, the materials are safe from brittle fracture over-70℃.
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AISI 4340鋼의 引張特性 및 破壞靭性에 미치는 溫度의 影響에 관한 硏究
성낙원,심봉식 동아대학교 공과대학 부설 한국자원개발연구소 1991 硏究報告 Vol.15 No.1
The K_(IC) value derived from CVN test were considerably different from measured value and it was difficult to predict the correct K_(IC) value of the materials under consideration. Compact tension and Charpy V―notch test in the invironment of high and low temperature on the specimen of AISI4340 steel have been conducted. The results may be sumerized as follows. The transition temperature by the impact absorbation energy range from - 50℃ and 150℃ and the impact energy from lower and high shelf have a tendencies of increasing with increase of the temperature. The measured K_(IC) value from CT test linearly increased with the increase of temperature. The K_(IC) value from the test fomular were derived and the error are within 6.8% against measured K_(IC) value.
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炭素纖維强化 複合材料의 機械的 强度特性 및 疲勞壽命豫測에 관한 硏究
成洛元,沈奉植 동아대학교 공과대학 부설 한국자원개발연구소 1993 硏究報告 Vol.17 No.1
An experimental investigation was performed on the carbon-epoxy resin composite materials under constant stress amplitude and two step loading high low type and low high type loading, to study the mechanical properties and fatigue properties. Different shape of test specimen and test methods were used for evaluating the dispersion pattern in fatigue life and its reliability. A statistical approach was applied to test data with the aid of two parameter Weibull probabilities. It is indicated that the dispersions in the fatigue life are more wider at the high stress amplitude than at the low stress level and fatigue life was extended in the two step loading. Experimental data for the fatigue life showed good agreement with the one of the theoretically predicted at high stress level.
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