Two-scale approach to dynamic localization failure of AISI 316H stainless steel sheets
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;
Original pageKeywords: 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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