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조해용,이종신,박인기 ( Hae Yong Cho,Jong Shin Lee,In Gi Park ) 충북대학교 산업과학기술연구소 1996 산업과학기술연구 논문집 Vol.10 No.1
Abstract_Roman This paper described integrated forging analysis program of gear-like components such as involute spur gear, trapezoidal spline, square spline, serration and circular gear by upper bound method. Each components has proper deformation regio
유리섬유 강화 플라스틱과 알루미늄 합금 접합을 위한 유한요소해석
조해용,김동범,Cho, Hae-Yong,Kim, Dongbum 대한용접접합학회 2015 대한용접·접합학회지 Vol.33 No.2
Self-piercing rivet(SPR) is mechanical joining methods and which can be joining dissimilar materials. Unlike conventional riveting, SPR also needs no pre-drilled holes. During plastically deformation, SPR pierces upper sheet and joins it to under sheet. SPR has been mainly applied to the joining the automobile body and some materials, such as glass fiber reinforced polymer and aluminum alloy, which represent the sheet-formed materials for lightweight automobile. Glass fiber reinforced plastic(GFRP) has been considered as a partial application of the automobile body which is lighter than steels and stronger than aluminium alloys. It is needed SPR to join Al alloy sheets and GFRP ones. In this paper, in order to design the rivet and anvil, which are suitable for GFRP, the joinability was examined through simulations of SPR joining between GFRP and Al alloy sheets. For this study, AutoCAD was used for the modeling and the simulated using commercial FEM code DEFORM-2D. The simulated results for SPR process joining between GFRP and Al alloys were confirmed by the same conditions as experimental trials.
조해용,최종웅,최선순 ( Hae Yong Cho,Jong Ung Choi,Seon Soon Choi ) 충북대학교 산업과학기술연구소 1995 산업과학기술연구 논문집 Vol.9 No.1
Abstract_Roman A simulation method based on upper bound method is developed in order to characterize for- ging characters in forging of spur gears. In this paper, a kinematically admissible velocity field was newly proposed and applied to study the effec
조해용 선문대학교 2000 공학계열 논총 Vol.3 No.-
갈대, 줄, 미나리 그리고 애기부들의 조사결과는 단위면적당 지상부 최대생산량이 각각 3,257 g/m, 3,077 g/m², 2,550 g/m² 2,483 g/m²으로 순생산량이 매우 높은 것으로 나타났다. 수생식물의 지상부와 지하부의 비를 조사한 자료를 이용하여 계산된 지하부 현존량은 갈대, 애기부들, 줄, 미나리가 각각 8,500 g/m², 1,688 g/m², 917 g/m², 415 g/m²이었다. 갈대, 애기부들, 줄 그리고 미나리 각 기관의 영양염류 함량은 식물의 종류 에 따라 차이가 있었다. 식물의 최대생물량과 그 식물의 지상부 각 기관의 영양염류'함량을 이용하여 계산된 지상부 영양염류 최대현존량은 갈대에서 가장 많은 것으로 나타났다. 지상부와 지하부에 포함되어 있는 영양 염류 최대현존량은 갈대에서 859 kg N/ha, 106,7 kg P/ha, 애기부들에서 758 kg N/ha, 174.4 kg P/ha, 줄에 서 903 kg N/ha, 127.7 kg P/ha, 미나리에서 844 kg N/ha, 116.7 kg P/ha이었다. The maximum above-ground standing biomass in Phragmites communis, Zizania latifolia, Oenanthe javanica and Typha angustata was 3,257 g/m², 3077 g/m², 2,550 g/m², 2,483 g/m² respectively. Below-ground standing biomass was 8,500 g/m², 1,688 g/m², 917 g/m², 415 g/m², respectively. Concentration of nutrients in each organ was different among plant species. Maximum amount of standing nutrients were the highest in reed stand. Amount of maximum standing nutrients are 859 kg N/ha, 106.7 kg P/ha for Phragmites communis, 758 kg N/ha, 174.4 kg P/ha for Typha angustata, 903 kg N/ha, 127.7 kg P/ha for Zizania latifolia and 844 kg N/ha, 116.7 kg P/ha for Oenanthe javanica, respectively.
조해용,최종웅,이상준 ( Hae Yong Cho,Jong Ung Choi,Sang Jun Lee ) 충북대학교 산업과학기술연구소 1995 산업과학기술연구 논문집 Vol.9 No.2
Abstract_Roman A Kinematically admissible velocity field has been proposed and is applied to forging of machine part such as square spline with hollow and solid billet in this study. The half pitch of square spline has been divided into five deformation
조해용,최종웅,이상준 ( Hae Yong Cho,Jong Ung Choi,Sang Jun Lee ) 충북대학교 산업과학기술연구소 1995 산업과학기술연구 논문집 Vol.9 No.2
Abstract_Roman The upper bound method utilizing neutral surface is applied newly to trapezoidal spline and serration with purpose to verify that the using of neutral surface is useful for prediction of load and inner flow of material of gear-like compone
조해용,박인기,이종신 ( Hae Yong Cho,In Gi Park,Jong Shin Lee ) 충북대학교 산업과학기술연구소 1996 산업과학기술연구 논문집 Vol.10 No.1
Abstract_Roman This paper describes forging of circular toothed gears as a series of development of simulator for non-axisymmetric parts. Kinematically admissible velocity fields for forging of circular gear have been proposed. The half pitch of gear has