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Calculation of Contact Pressure to the Die of Axisymmetric Extrusion by Using Upper Bound Solution  

Choi Young (인제대학교 기계자동차공학부)
Yeo Hong-Tae (동의대학교 기계공학과)
Hur Kwando (동의대학교 기계공학과)
Publication Information
Journal of the Korean Society for Precision Engineering / v.21, no.12, 2004 , pp. 133-139 More about this Journal
Abstract
In general, the contact pressure to the die cannot be easily determined by using upper bound solution. Recently, the authors have proposed the method determining the contact pressure with the upper bound solution for the forming with the plane stain plastic deformation. In this paper, the method is applied to an axisymmetric forward extrusion process. The contact pressure to the die of the axisymmetric extrusion has been determined with the upper bound solution and compared with the result of rigid plastic FEM. The optimal semi-angles of die have been obtained minimizing the relative contact pressure to die fur the extrusion ratio.
Keywords
Contact pressure; Upper bound solution; Axisymmetric Extrusion;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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