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Prediction of elastic recovery of a formed steel sheet considering stiffness degradation
Halilovič, Miroslav (Avtor), Vrh, Marko (Avtor), Štok, Boris (Avtor)

URLURL - Predstavitvena datoteka, za dostop obiščite http://dx.doi.org/10.1007/s11012-008-9169-8 Povezava se odpre v novem oknu

Izvleček
The aim of this work is to show first, how the springback of a steel sheet drawn part is affected by the stiffness degradation, as it results from the damage evolved during forming process, and second, to build a respective modeling approach to take this degradation into account. For the considerationof the orthotropic elastic properties degradation we develop an approach, based on the Mori-Tanaka theory, where damage is considered by inclusion of ellipsoidal cavities. The respective void shape evolution is proposed to be identified with the measurements of elastic modulus in two perpendicular directions during the uniaxial tensile test of a flat specimen at different loading stages. The proposed approach is coupled with the Gurson-Tvergaard-Needleman (GTN) plastic potential, though it could be substituted by almost any other continuum damage model. At the end the presented approach is experimentally validated by a simple springback test, developed by authors. A very good agreement between by calculation predicted and measured springback amount is observed.

Jezik:Angleški jezik
Ključne besede:preoblikovanje pločevine, globoki vlek, elastična povračljivost, poškodbe, ortotropne lastnosti, steel drawing, springback, damage, orthotropic properties, stiffness degradation
Vrsta gradiva:Delo ni kategorizirano (r6)
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FS - Fakulteta za strojništvo
Leto izida:2009
Št. strani:str. 321-338
Številčenje:Vol. 44, no. 3
UDK:621.9
ISSN pri članku:0025-6455
DOI:10.1007/s11012-008-9169-8 Povezava se odpre v novem oknu
COBISS.SI-ID:10694683 Povezava se odpre v novem oknu
Število ogledov:463
Število prenosov:170
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Naslov:Meccanica
Skrajšan naslov:Meccanica
Založnik:Tamburini Editore SpA
ISSN:0025-6455
COBISS.SI-ID:25918464 Povezava se odpre v novem oknu

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