Naslov
On Modelling of Kinematic Hardening Responses in Finite Strain Elastoplasticity

Autori
Karšaj, Igor ; Sansour, Carlo ; Sorić, Jurica

Izvornik
Transactions of FAMENA (1333-1124) 28 (2004), 2; 1-10

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
large strain; isotropic and kinematic hardening; exponential map

Sažetak
In this paper, a free energy-based formulation incorporating the effect of kinematic hardening is proposed. The formulation enjoys the features of reproducing symmetric expressions for the back stress and of incorporating the multiplicative decomposition of the deformation gradient. Kinematic hardening is combined with isotropic hardening where an associative flow rule and the von Mises yield criterion are applied. An accurate and automatically objective integration algorithm employing the exponential map is developed. In order to ensure a high convergence rate in the global iteration approach, an algorithmic tangent operator is derived. The computational algorithm is implemented at the material point level of a shell finite element which allows the use of complete three-dimensional constitutive laws. Robustness and efficiency of the proposed algorithm are demonstrated by numerical examples.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

Napomena
Časopis naveden u pravilniku iz NN 2/97

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