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Thermo-viscoplastic parameter identification formulated as an inverse finite element analysis of the hot torsion test

Abstract : This paper deals with an inverse finite element approach applied to the analysis of the steel behaviour during a hot torsion test. The rheological test is simulated by a finite element model and the inverse analysis principle is to find the constitutive parameters which permit to compute the closest values of a set of experimental torques which are measured for different operating conditions. A least square deviation between computed and measured variables is minimized with respect to the rheological coefficients corresponding to an appropriate material constitutive equation. A numerical validation of the proposed method is illustrated in the case of a Norton-Hoff thermo-viscoplastic law. All the rheological parameters which defined the consistency and the strain rate sensitivity can be simultaneously determined for a chosen analytical expression.
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https://hal-mines-paristech.archives-ouvertes.fr/hal-00673867
Contributor : Magalie Prudon <>
Submitted on : Friday, February 24, 2012 - 2:26:18 PM
Last modification on : Thursday, September 24, 2020 - 5:22:54 PM

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  • HAL Id : hal-00673867, version 1

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Adinel L. Gavrus, Elisabeth Massoni, Jean-Loup Chenot. Thermo-viscoplastic parameter identification formulated as an inverse finite element analysis of the hot torsion test. Steel research, 1999, 70 (7), pp.Pages 259-268. ⟨hal-00673867⟩

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