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경도와 변형률 관계 예측을 위한 유한요소해석에 관한 연구
박준홍(J. H. Park),김형준(H. J. Kim),김효겸(H. G. Kim),이재섭(J. S. Lee),김현수(H. S. Kim),전언찬(E. C. Jeon),김영희(Y. H. Kim),성장현(J. H. Sung) 한국생산제조학회 2006 한국생산제조시스템학회 학술발표대회 논문집 Vol.2006 No.5
Vickers hardness is one of the most widely useful methods to obtain mechanical properties of a product. The hardness number of a cold-forged product is in close relation with its effective strain. However, few attempts to obtain the relation not by empirical results but by only simulation have been made for the Vickers hardness test. This paper presents the method to predict the relation between effective strains and the hardness by using FE-simulation of the hardness test without time-killing experiments. The results of FE-simulation for the materials are compared with those of experiments and also compared with those of experiments of the previous study to show the feasibility of the proposed method.
박준홍(J. H. Park),강정호(J. H Kang),김승규(S. G. Kim),김성환(S. H. Kim),서성열(S. Y. Seo),박건형(G. H. Park),박영철(Y. C. Park) 한국기계가공학회 2008 한국기계가공학회 춘추계학술대회 논문집 Vol.2008 No.-
Deep Drawing Process is used often in Forming Clutch Drum hub Preform. Optimizing die design and the process variables such as die shoulder shape influences Thickness Variation of Drum-hub preform. Using FE-simulation, examine their relation. To find the optimum conditions for improving deep drawing, a series of the experiments are preformed. From the results of this propose die shoulder shape and optimum measure. And the optimum values of process variables are examined and discussed.