Rigid-plastic/rigid-viscoplastic FE simulation using linear programming for metal forming

Lawrence Erlbaum Association
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Journal article
Xu, W., Di, S., and Thomson, P. 2006 'Rigid-plastic/rigid-viscoplastic FE simulation using linear programming for metal forming', International Journal For Numerical Methods In Engineering, vol. 56, no. 4, pp. 61-77.
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For rigid-plastic/rigid-viscoplastic (RP/RVP) FE simulation in metal forming processes, the linear programming (LP) approach has many remarkable advantages, compared with a normal iterative solver. This approach is free from convergence problems and is convenient for dealing with contact surfaces, rigid zones, and friction forces. In this paper, a numerical model for axisymmetrical and plane-strain analysis using RP/RVP and LP is proposed and applied to industrial metal forming. Numerical examples are provided to validate the accuracy and efficiency of the proposed method.
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