Naslov
On the Numerical Modelling of Orthotropic 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 ICCES '04: International Conference on Computational & Experimental Engineering and Sciences, CD-ROM edition / Atluri, S.N. - , 2004

Skup
International Conference on Computational & Experimental Engineering and Sciences

Mjesto i datum
Funchal, Portugal, 26.07.2004. - 29.07.2004

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
orthotropic yield function; multiplicative inelasticity; finite strain; isotropic hardening; exponential map

Sažetak
The paper deals with a new aspect of anisotropic elastoplastic analysis at finite strain. An anisotropic elastic constitutive law, described in invariant setting by use of the structural tensors and the elastic part of right Cauchy-Green tensor, is presented. The material model enjoys a feature of the multiplicative decomposition of the deformation gradient. An anisotropic Hill's type yield criterion described by Eshelby' stress tensor and structural tensors is applied. A model of the nonlinear isotropic hardening is employed. Explicit results for the specific case of orthotropic anisotropy are given. An accurate and trivial wise objective integration algorithm employing exponential map is derived. The numerical example demonstrates the influence of anisotropy on elastoplastic deformation responses as well as robustness and accuracy of the proposed formulation.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

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