Three Dimensional Upper Bound Modelling for Extrusion of Round-to-Octagon Section Using Linearly Converging Die

Abstract:

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The extrusion of section from round billet poses a great challenge for theoretical modeling of the process using upper bound method. The greatest difficulty in three-dimensional upper bound method is to determine kinematically admissible velocity field. The SERR (Spatial Elementary Rigid Region) technique is fairly applicable for analyzing extrusion of sections having re-entrant corners. A modified version of SERR technique has been used for extrusion of octagon sections from round billet through a linearly converging die. The circular cross section of the round billet is approximated by a regular polygon of equal area. The extrusion pressure has been computed for different boundary condition at the die billet interface. The optimum die geometry has been determined.

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Periodical:

Edited by:

A. Erman Tekkaya and Nooman Ben Khalifa

Pages:

189-196

DOI:

10.4028/www.scientific.net/KEM.424.189

Citation:

K. P. Maity and A. K. Rout, "Three Dimensional Upper Bound Modelling for Extrusion of Round-to-Octagon Section Using Linearly Converging Die", Key Engineering Materials, Vol. 424, pp. 189-196, 2010

Online since:

December 2009

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$35.00

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