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Material parameters identification: Gradient-based, genetic and hybrid optimiza...
Chaparro, B. M.; Thuillier, S.; Menezes, L. F.; Manach, P. Y.; Fernandes, J. V.This paper presents two procedures for the identification of material parameters, a genetic algorithm and a gradient-based algorithm. These algorithms enable both the yield criterion and the work hardening parameters to be identified. A hybrid algorithm is also used, which is a combination of the former two, in such a way that the result of the genetic algorithm is considered as the initial values for the gradi...
Experimental and numerical study of reverse re-drawing of anisotropic sheet metals
Thuillier, S.; Manach, P. Y.; Menezes, L. F.; Oliveira, M. C.This study deals with the experimental and numerical reverse re-drawing of cylindrical cups. Experiments were carried out on a classical tensile test machine of maximum load 100 kN. Experimental data consist of force-displacement curves of the punch and thickness distribution in the cup wall at 0°, 45° and 90° to the rolling direction (RD). The drawing process was simulated using both the dynamic explicit finit...
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