Publication detail
Relations between structure of material, strain rate and numerical simulations
FOREJT, M. KREJČÍ, J. JOPEK, M. BUCHAR, J.
Czech title
Vztah mezi strukturou materiálu, rychlosti deformace a numerickou simulací
English title
Relations between structure of material, strain rate and numerical simulations
Type
conference paper
Language
en
Original abstract
The paper presents some problems posed by material models of high strain rate deformation in the form of constitutive equations. Parameters of constitutive equations are identified with sufficient accuracy by the TAT (Taylor anvil test) methods. These test performed on miscellaneous materials show one common anomaly. The numerical simulations of resulting speciment shape by the LS DYNA 3D, using Johnson-Cook equation (or other, e.g., Zerilli Armstrong) do not agree with experiment along the entire speciment length. The amount of disagreement depends on impact velocity.
Czech abstract
Příspěvek ukazuje na některé problémy s určením parametrů konstitutivní rovnice Johnson-Cooka ověřované kompresním testem dle Taylora. Pro modelování chování materiálů při vysokých rychlostech deformace je používána řada konstitutivních vztahů, z nichž nejpoužívanější jsou definované Johnson-Cookem a Zerilli -Armstrongem.
English abstract
The paper presents some problems posed by material models of high strain rate deformation in the form of constitutive equations. Parameters of constitutive equations are identified with sufficient accuracy by the TAT (Taylor anvil test) methods. These test performed on miscellaneous materials show one common anomaly. The numerical simulations of resulting speciment shape by the LS DYNA 3D, using Johnson-Cook equation (or other, e.g., Zerilli Armstrong) do not agree with experiment along the entire speciment length. The amount of disagreement depends on impact velocity.
Keywords in English
TAT, constitutive equations, strain rate sensitivity, numerical simulations, deformation, structure
RIV year
2001
Released
25.10.2001
Publisher
STU Bratislava
Location
Bratislava
ISBN
80-227-1591-3
Book
9th International Scientific Conference CO-MAT-TECH 2001
Edition number
1.
Pages from–to
64–69
Pages count
6
BIBTEX
@inproceedings{BUT3223,
author="Milan {Forejt} and Jan {Krejčí} and Miroslav {Jopek} and Jaroslav {Buchar},
title="Relations between structure of material, strain rate and numerical simulations",
booktitle="9th International Scientific Conference CO-MAT-TECH 2001",
year="2001",
month="October",
pages="64--69",
publisher="STU Bratislava",
address="Bratislava",
isbn="80-227-1591-3"
}