Publication detail
On the Proportionality of Damage Rule in Finite Element Simulations of the Ductile Failure
ŠEBEK, F. HŮLKA, J. KUBÍK, P. PETRUŠKA, J.
Czech title
O proporcionalitě rozvoje poškození v simulacích tvárného porušování pomocí metody konečných prvků
English title
On the Proportionality of Damage Rule in Finite Element Simulations of the Ductile Failure
Type
conference paper
Language
en
Original abstract
Extended Mohr-Coulomb criterion which is uncoupled, therefore the plasticity is not influenced by the damage, was selected and calibrated. Experiments on the aluminum alloy 2024-T351 were carried out. Further, the impact of the damage rule proportionality was investigated. The damage exponent was sequentially held 1, 2 and 3, respectively. Therefore, the influence of the damage rate on the damage failure in finite element simulations was examined. Numerical simulations of the tensile test of smooth and notched cylindrical specimens and flat grooved specimen were performed. It is also shown that there is inability to predict slant fracture by uncoupled models for flat grooved specimen and in the final phase of tensile tests of cylindrical specimens.
Czech abstract
Rozšířené Mohrovo-Coulombovo kritérium, které je nesvázané, tudíž plasticita není ovlivněna poškozením, bylo vybráno a kalibrováno. Byly provedeny experimenty na hliníkové slitině 2024-T351. Dále byl zkoumán vliv proporcionality rozvoje poškození. Exponent poškození byl postupně držen 1, 2 a 3. Tudíž byl zkoumán vliv rychlosti rozvoje poškození na tvárné porušování v simulacích pomocí metody konečných prvků. Byly provedeny numerické simulace tahové zkoušky hladkých a vrubovaných válcových těles a plochých drážkovaných vzorků. Bylo také ukázáno, že nesvázané modely nejsou schopny předvídat šikmý lom u plochých drážkovaných vzorků a v konečné fázi tahových zkoušek válcových vzorků.
English abstract
Extended Mohr-Coulomb criterion which is uncoupled, therefore the plasticity is not influenced by the damage, was selected and calibrated. Experiments on the aluminum alloy 2024-T351 were carried out. Further, the impact of the damage rule proportionality was investigated. The damage exponent was sequentially held 1, 2 and 3, respectively. Therefore, the influence of the damage rate on the damage failure in finite element simulations was examined. Numerical simulations of the tensile test of smooth and notched cylindrical specimens and flat grooved specimen were performed. It is also shown that there is inability to predict slant fracture by uncoupled models for flat grooved specimen and in the final phase of tensile tests of cylindrical specimens.
Keywords in Czech
tvárné porušování; rozvoj poškození; nesvázaný model; explicitní
Keywords in English
ductile failure; damage rule; uncoupled model; explicit
RIV year
2014
Released
30.06.2014
ISBN
9783038351580
ISSN
1022-6680
Book
Modern Technologies for Engineering, Applied Mechanics and Material Science
Volume
980
Pages from–to
189–193
Pages count
5
BIBTEX
@inproceedings{BUT108064,
author="František {Šebek} and Jiří {Hůlka} and Petr {Kubík} and Jindřich {Petruška},
title="On the Proportionality of Damage Rule in Finite Element Simulations of the Ductile Failure",
booktitle="Modern Technologies for Engineering, Applied Mechanics and Material Science",
year="2014",
volume="980",
month="June",
pages="189--193",
isbn="9783038351580",
issn="1022-6680"
}