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FCEV용 고압 밸브 실링부의 고무재질에 따른 기밀해석
박근영,양갑진,노의동,박준수,전문수,이형욱,Park, G.Y.,Yang, K.J.,Ro, E.D.,Park, J.S.,Chon, M.S.,Lee, H.W. 한국교통대학교 융복합기술연구소 2017 융ㆍ복합기술연구소 논문집 Vol.7 No.2
The design of sealing mechanisms of a manual pressure valve was analyzed with FE analysis for a hydrogen fuels charge and discharge system of FCEV. The damage prediction of the O-ring with respect to the material models of rubbers was calculated by the gap analysis of the backup ring and O-ring according to the internal pressure. Two kinds of the rubber material characteristic models were adopted to the O-ring. One was the linear elastic and the other was hyperelastic of Ogden $3^{rd}$ order model. The experimental data of urethane of Shore hardness 90 was utilized to the curve fitting of hyperelastic properties. It was found that the contact pattern of the backup ring was different in two models and the sealing mechanism was better in the case of the hyperelastic characteristic model.
해석요소 선택에 따른 주철제 맨홀 및 틀의 구조해석기법
이형욱(H. W. Lee),박근영(G. Y. Park),김덕원(D. W. Kim),김명호(M. H. Kim),김승중(S. J. Kim) 한국소성가공학회 2015 한국소성가공학회 학술대회 논문집 Vol.2015 No.10
Manholes are constructed on road in order to maintain water and sewage pipelines as an entering gate for related persons. Recently locking devices of a manhole have been developed to prevent lost or stolen of the manhole. In this study, stress analysis of a cast-iron manhole was carried out as a part of the lightweight design. Stress analysis according to the solid elements selection was conducted to search a proper the tetra element for applying to complicated geometry model. Maximum stress, the deflection at the center, and stress distribution were considered as main factors in the comparison. The result of the normal second-order tetra element(C3D10) was similar to that of the first-order hex element with incompatible mode(C3D8I) in this case.