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A new anisotropic elasto-plastic model with degradation of elastic modulus for accurate springback simulationsVrh, Marko, strojnik ...Springback, a phenomenon that is governed by elastic strain recovery after the removal of forming loads, is of great concern in sheet metal forming. There is no doubt that in this regard, physically ... reliable numerical modelling of the forming process and predictions of springback obtained by respective computer simulations are crucial for controlling this problem. Unfortunately, by currently available approaches, springback still cannot be adequately predicted in general. In this paper, a new constitutive model is proposed which considers simultaneously sheet anisotropy, damage evolution and strain path-dependent stiffness degradation during sheet metal forming. For parameter identification of the built constitutive model, a particular experimental procedure is developed and an optimization procedure is employed to solve the inverse problem that arises. The proposed approach to constitutive modelling is validated in the end by a simulation of the springback in the formed HSS steel sheet. The simulation results, which prove to be in good agreement with the experimental ones, lead to the conclusion that accurate modelling only of anisotropic yielding is not enough to accurately predict the springback phenomenon; the constitutive model should also include the strain path-dependent change of the elastic moduli.Source: International journal of material forming. - ISSN 1960-6206 (Vol. 4, no. 2, 2011, str. 217-225)Type of material - article, component partPublish date - 2011Language - englishCOBISS.SI-ID - 11877915
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source: International journal of material forming. - ISSN 1960-6206 (Vol. 4, no. 2, 2011, str. 217-225)
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Vrh, Marko, strojnik | 28648 |
Halilovič, Miroslav | 20443 |
Starman, Bojan, 1985- | 33274 |
Štok, Boris | 04078 |
Source: Personal bibliographies
and: SICRIS
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