Pregled bibliografske jedinice broj: 254549
Computational aspects of anisotropic finite strain plasticity based on the multiplicative decomposition
Computational aspects of anisotropic finite strain plasticity based on the multiplicative decomposition // Proceedings of III European Conference of Computational Mechanics, CD-ROM edition / C.A. Mota Soares et.al. (ur.).
Lisabon: Springer, 2006. str. 270-270 (predavanje, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)
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Naslov
Computational aspects of anisotropic finite strain plasticity based on the multiplicative decomposition
Autori
Karšaj, Igor ; Sansour, Carlo ; Sorić, Jurica
Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni
Izvornik
Proceedings of III European Conference of Computational Mechanics, CD-ROM edition
/ C.A. Mota Soares et.al. - Lisabon : Springer, 2006, 270-270
Skup
III European Conference on Computational Mechanics Solids, Structures and Coupled Problems in Engineering
Mjesto i datum
Lisabon, Portugal, 05.06.2006. - 08.06.2006
Vrsta sudjelovanja
Predavanje
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
anisotropic plasticity; orthotropic yield function; multiplicative inelasticity; finite strains
Sažetak
The paper is concerned with the computational aspects of two different models for anisotropic multiplicative finite strain plasticity. The first model is based on the idea that Fp, which defines the plastic part of the multiplicative decomposition, is a material-like tensor. The free energy function is then formulated using the elastic strain measure Ce together with structural tensors defined at the reference configuration. In the second formulation, non-symmetric modified structural tensor are utilized together with the strain measure Ce. The second formulation prove to be invariant with respect to rigid body rotations superimposed on Fp. In both formulations a Hill-type yield criterion, described by the material non-symmetric stress tensor and further structural tensors, is utilized. However, there is a difference in the form of the thermodynamic force defined by the reduced dissipation inequality. While in the first formulation we an Eshelby-like stress tensor, in the second, a modified stress tensor is applied. The integration of evolution equations is performed using the exponential map which preserves plastic incompressibility. However, the multiplicative nature of the formulations makes the numerical procedures quite involved. Nonetheless, consistent linearisations of the formulations are achieved by recognising various implicit dependencies of the variables involved. The interrelation of the two different formulations is demonstrated by numerical examples.
Izvorni jezik
Engleski
Znanstvena područja
Strojarstvo
