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TEORIJSKA
I PRIMENJENA MEHANIKA 2008 Vol.35(1-3), pp.93-104
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Summary: |
W.Gambin,
K.Kowalczyk-Gajewska,
L.Kudrjavceva,
M.Micunovic |
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Two-scale approach to dynamic
localization failure
of AISI 316H stainless steel sheets
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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 behaviour 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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