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Article Dans Une Revue Steel research Année : 1999

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

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Résumé

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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Dates et versions

hal-00673867 , version 1 (24-02-2012)

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Adinel 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. ⟨10.1002/srin.199905637⟩. ⟨hal-00673867⟩
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