Publication detail
Associated and non-associated flow rules in the stress state prediction
VOBEJDA, R. ŠEBEK, F. PETRUŠKA, J. KUBÍK, P.
Czech title
Sdružené a nesdružené zákony tečení při predikci napěťového stavu
English title
Associated and non-associated flow rules in the stress state prediction
Type
conference paper
Language
en
Original abstract
The paper deals with an application of the non-associated flow rule within a complex plasticity model. This leads to a significant improvement in the predicted stress state. The predicted stress state is closer to theoretical value on the contrary to the case when an associated flow rule – within quadratic or non-quadratic yield criteria – is used. The implementation of a more flexible plasticity model will be subject of a further study. The results suggest that the yield criterion has to be more versatile within Haigh–Westergaard space.
Czech abstract
Článek se zabývá aplikací nesdruženého zákona tečení v rámci komplexního modelu plasticity. To vede na výrazné vylepšení predikce napěťového stavu. Predikovaný napěťový stav je blíže teoretické hodnotě na rozdíl od případu, kdy je použit sdružený zákon tečení – s kvadratickými nebo nekvadratickými podmínkami plasticity. Implementace více flexibilního modelu plasticity bude předmětem další studie. Výsledky naznačují, že podmínka plasticity musí být více univerzální v rámci Haighova–Westergaardova prostoru.
English abstract
The paper deals with an application of the non-associated flow rule within a complex plasticity model. This leads to a significant improvement in the predicted stress state. The predicted stress state is closer to theoretical value on the contrary to the case when an associated flow rule – within quadratic or non-quadratic yield criteria – is used. The implementation of a more flexible plasticity model will be subject of a further study. The results suggest that the yield criterion has to be more versatile within Haigh–Westergaard space.
Keywords in Czech
Nesdružený zákon tečení; Podmínka plasticity; Deviátorové napětí; Rovinná deformace; Lokalizace
Keywords in English
Non-associated flow rule; Yield criterion; Deviatoric stress; Plain strain; Localization
Released
24.11.2020
ISBN
978-80-214-5896-3
Book
Engineering Mechanics 2020
Pages from–to
512–515
Pages count
4
BIBTEX
@inproceedings{BUT167752,
author="Radek {Vobejda} and František {Šebek} and Jindřich {Petruška} and Petr {Kubík},
title="Associated and non-associated flow rules in the stress state prediction",
booktitle="Engineering Mechanics 2020",
year="2020",
month="November",
pages="512--515",
isbn="978-80-214-5896-3"
}