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Stress resultant plasticity for shells revisited
ID Dujc, Jaka (Avtor), ID Brank, Boštjan (Avtor)

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Izvleček
In this work, we revisit the stress resultant elastoplastic geometrically exact shell finite element formulation that is based on the Ilyushin–Shapiro two-surface yield function with isotropic and kinematic hardening. The main focus is on implicit projection algorithms for computation of updated values of internal variables for stress resultant shell elastoplasticity. Four different algorithms are derived and compared. Three of them yield practically identical final results, yet they differ considerably in computational efficiency and implementation complexity, since they solve different sets of equations and they use different procedures that choose active yield surfaces. One algorithm does not provide acceptable accuracy. It turns out that the most simple and straightforward algorithm performs surprisingly well and efficiently. Several numerical examples are presented to illustrate the Ilyushin–Shapiro stress resultant shell formulation and the numerical performance of the presented integration algorithms.

Jezik:Angleški jezik
Ključne besede:večploskovna plastičnost, lupine, integracijski algoritmi, multi-surface plasticity, shells, integration algorithms
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FGG - Fakulteta za gradbeništvo in geodezijo
Leto izida:2012
Založnik:Elsevier
Št. strani:Str. 146-165
Številčenje:Letn. 247/248, Letn. 247/248
UDK:624.074.43
ISSN pri članku:0045-7825
DOI:10.1016/j.cma.2012.07.012 Povezava se odpre v novem oknu
COBISS.SI-ID:5921121 Povezava se odpre v novem oknu
Datum objave v RUL:10.07.2015
Število ogledov:2967
Število prenosov:824
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Gradivo je del revije

Naslov:Computer methods in applied mechanics and engineering
Skrajšan naslov:Comput. methods appl. mech. eng.
Založnik:Elsevier
ISSN:0045-7825
COBISS.SI-ID:6695685 Povezava se odpre v novem oknu

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