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이민근,이명원,Lee, Min-Geun,Lee, Myeong-Won 한국정보처리학회 2001 정보처리학회논문지 A Vol.8 No.1
In this paper, we present an interactive 3D character modeling and animation including a data management tool for editing the animation. It includes an animation editor for changing animation sequences according to the modified structure of 3D object in the object structure editor. The animation tool has the feature that it can produce motion data independently of any modeling tool including our modeling tool. Differently from conventional 3D graphics tools that model objects based on geometrically calculated data, our tool models 3D geometric and animation data by approximating to the real object using 2D image interactively. There are some applications that do not need precise representation, but an easier way to obtain an approximated model looking similar to the real object. Our tool is appropriate for such applications. This paper has focused on the data management for enhancing the automatin and convenience when editing a motion or when mapping a motion to the other character.
이민근(Min Geun Lee),정상원(Sang Won Chung),문바울(Pa Ul Mun) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12
The springback to the metal forming is one of the most important issues. The springback of high strength steel under U-bending has been studied for a material orientation in which U-bending process is presumed to have the highest forming. In the study, the effects of the variable on springback of U-bending depending on intrusion direction, forming speed and blank holding force are investigated. And numerical analyses are performed to predict the amount of springback and to analyze the results. Practical and physical meaning of the results are discussed.
이민근(Min Geun Lee),강기주(Ki-ju Kang) 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.11
In this article, a new type to of Shellular, named B-Shellular (Bead based-Shellular), is introduced. B-Shellular is fabricated using polymer beads arranged in a regular pattern of 3D lattice. After connection between beads with another polymer, the surface is coated using electroless plating and the interior beads and the connections are etched out to obtain a hollow structure. To evaluate the mechanical properties under compression, FEA has been carried out. The results are compared with those for a simple structure of hollow spheres to investigate the effect of the connections between cells, specifically, the effect of the size of the connections and the thickness of shells.