Abstract

DIOSDADO DE LA PENA, José Ángel et al. Optimization of Barlat 3 parameter material model with aluminum alloy experimental curves. Acta univ [online]. 2016, vol.26, n.6, pp.35-43. ISSN 2007-9621.  https://doi.org/10.15174/au.2017.1134.

This paper presents computed constants of 3 parameter Barlat material model, hardening coefficient (n), strength coefficient (K) and anisotropic constants (r00, r45, and r90) obtained from tensile test data for sheet type specimens at different rolling direction (0°, 45°, and 90°). These anisotropic parameters from an aluminum alloy sheet are used to feed three parameter Barlat material model in LS-DYNA® software, to generate a file that is required to perform an optimization in LS-OPT® software. Experimental data is used to generate real strain-real stress curves, and are compared with those obtained from LSDYNA® simulations with optimized parameters, getting a closer curve to experimental data, particularly in plastic zone.

Keywords : Optimization; Barlat parameters; hardening exponent; plastic-strain ratio; constant of proportionality.

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