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A local optimisation method for obtaining material model parameters

Duncan Macdougall (Department of Engineering Science, Oxford University, Oxford, UK)
Nikica Petrinic (Department of Engineering Science, Oxford University, Oxford, UK)

Engineering Computations

ISSN: 0264-4401

Article publication date: 1 March 2000

Abstract

A local optimisation method for obtaining material parameters in finite element simulations has been developed. The method is based on the minimisation of an error function which reflects the accuracy of a numerical prediction with respect to the results of simple specimen tests. The experimental data were obtained from high strain rate tensile tests on the alloy 90 per cent titanium – 6 per cent aluminium – 4 per cent vanadium (Ti6Al4V) using the tensile split‐Hopkinson pressure bar. The behaviour of the tensile specimen was monitored during the test using high‐speed photography and transient recorders. Finite element simulations were performed using ABAQUS/Explicit employing the Zerilli‐Armstrong material model for bcc metals).

Keywords

Citation

Macdougall, D. and Petrinic, N. (2000), "A local optimisation method for obtaining material model parameters", Engineering Computations, Vol. 17 No. 2, pp. 175-188. https://doi.org/10.1108/02644400010313129

Publisher

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MCB UP Ltd

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