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안동규(D. G. Ahn),이상훈(S. H. Lee),김민수(M. S. Kim),한길영(G. Y. Hahn),정창균(C. G. Jung),양동열(D. Y. Yang) 한국정밀공학회 2004 한국정밀공학회 학술발표대회 논문집 Vol.2004 No.10월
The objective of this research work is to investigate into characteristics of bending stiffness and failure for the ISB ultralightweight panel with internally structured material. The expanded metal with a pyramid shape and woven metal are employed as an internally structured material. In order to investigate the characteristics, the specific stiffness and failure map are estimated using the results of three-points bending test. From the results of the experiment, the influence of design parameters of ISB panel on the specific stiffness and failure mode has been found. In addition, it has been shown that ISB panel with expanded metal is prefer to that with woven metal from the view point of optimal design for ISB panel.
컴퓨터용 마우스 사출성형 금형의 열특성 개선을 위한 열전도성 금형 설계에 관한 연구
안동규(D. G. Ahn),김현우(H. W. Kim),이기용(K. Y. Lee) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
The objective of this paper is to investigate into the design of the heat conductive mould to improve thermal characteristics of the injection mould for a computer mouse. In order to enhance thermal management characteristics, including the high cooling rate and the uniform cooling, of the mould, a heat conductive mould with three different materials was designed. The materials of the base structure, the mid-layer and the molding part of the heat conductive mould were chosen as Cu-Ni alloy (Ampcoloy 940) to improve the heat conductivity of the mould, Ni-Cu alloy (Monel 400) to reduce a thermal stress, injection tool steel (P21), respectively. Through the three-dimensional transient heat transfer analysis, the influence of the geometrical arrangement of each material on thermal management characteristics was examined. From the results of the FEM analysis, a proper geometrical arrangement of each material was obtained.
안동규(D. G. Ahn),송동한(D. H. Song),손상식(S. S. Sohn),한길영(K. Y. Han) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
The objective of this paper is to examine the formability of the automotive component with high strength steel sheet using three-dimensional elasto-plastic finite element analysis. Commercial software AutoForm was used to perform three-dimensional FEA. From the results of the FEA, a proper design of sheet without split in the part were estimated. Final1y, the automotive component with high strength steel sheet could be successful1y manufactured through the stamping test.