Naslov
An Efficient Free Energy-Based Modelling of Kinematic Hardening in Large Strain Elastoplasticity

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

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the 7th International Conference on Computational Plasticity, CD-ROM edition / D.R.J.Owen ; Onate, E. ; Suarez, B. - Barcelona : International Center for Numerical Methods in Engineering (CIMNE), 2003

Skup
Seventh International Conference on Computational Plasticity (COMPLAS VII)

Mjesto i datum
Barcelona, Španjolska, 07.04.2003. - 10.04.2003

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
elastoplasticity; large strain; isotropic and kinematic hardening; finite element analysis

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 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

POVEZANOST RADA