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Two-scale approach to dynamic localization failure of AISI 316H stainless steel sheets

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Author(s): Gambin W. | Kowalczyk-Gajewska K. | Kudrjavčeva L.T. | Mićunović M.V.

Journal: Theoretical and Applied Mechanics
ISSN 1450-5584

Volume: 35;
Issue: 1-3;
Start page: 93;
Date: 2008;
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Keywords: dynamic localization failure | Forming Limit Diagrams | regularized Schmid law | sheet textures

ABSTRACT
Dynamic localization failure of a thin sheet made of AISI 316H steel is considered on the macroscopic and mesoscopic level for proportional and nonproportional stress paths. On the macroscopic level, we propose: (1) the replacement of time as independent variable by a function of plastic dissipation and (2) dependence of the initial equivalent yield stress on stress rate. On the mesoscopic level - the regularized Schmid model for description of the single grain behavior is used and the polycrystalline yield surface generated by the texture development enables to improve the Forming Limit Diagrams for the sheet element.
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