Naslov
Algorithmic formulation for evolutionary anisotropic plasticity model for sheet metals

Autori
Cvitanić, Vedrana ; Kovačić, Maja

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

Izvornik
Proceedings of the 8th International Congress of Croatian Society of Mechanics / Kožar, Ivica ; Bićanić, Nenad ; Jelenić, Gordan ; Čanađija, Marko - Opatija : Hrvatsko društvo za mehaniku (HDM), 2015

ISBN
978-953-7539-20-7

Skup
8th International Congress of Croatian Society of Mechanics

Mjesto i datum
Opatija, Hrvatska, 29.09.2015. - 02.10.2015

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
anisotropy evolution; sheet metals; stress integration; Hill stress function

Sažetak
In the present paper elasto-plastic constitutive formulations based on the orthotropic Hill (1948) stress function and distortional evolution of the yield function/plastic potential are presented. The anisotropy parameters of the Hill (1948) yield function/plastic potential are introduced as functions of the equivalent plastic strain. The formulations are developed and analyzed considering experimental data for the selected steel sheet sample with reported significant variation of the instantaneous Lankford parameter with straining. Predictions of the directional dependences and variations with straining of the yield stress ratios and Lankford parameters obtained by the presented description are considered. The algorithmic formulation of the analyzed constitutive description is derived by the application of the implicit return mapping algorithm. In order to estimate accuracy of the developed algorithm iso-error maps are calculated and analyzed.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo, Temeljne tehničke znanosti

POVEZANOST RADA