On the effect of different parameterizations of the flow rule on the efficiency of variational constitutive updates |
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| Authors: | Nikolaus Bleier Otto T Bruhns Jörn Mosler |
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| Institution: | 1. Institute for Mechanics, Ruhr University Bochum, 44780 Bochum, Germany;2. GKSS Research Centre, Institute of Materials Research, Materials Mechanics, 21502 Geesthacht, Germany |
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| Abstract: | The numerical efficiency of so-called variational constitutive updates for finite strain plasticity theory is analyzed. These updates compute the unknowns such as the plastic strains by minimizing an appropriate functional. Within the present paper, different parameterizations of the flow rule are utilized within the variational constitutive update scheme. It is shown that comparing to the return-mapping algorithm, the variational updates require significantly less iteration steps and thus, is numerically highly efficient. (© 2010 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim) |
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