Publication detail
Determination of Johnson-Cook equation parameters
ŠLAIS, M. DOHNAL, I. FOREJT, M.
Czech title
Stanovení parametrů rovnice Johnson-Cooka
English title
Determination of Johnson-Cook equation parameters
Type
journal article - other
Language
en
Original abstract
The paper deals with the influence of strain rate on the mechanical behaviour of the Ti-6Al-4V titanium alloy. After verification tests under static loading conditions, the specimens were deformed at high strain rates using the device for the Taylor anvil test. Results of an image analysis of deformed specimens from the Taylor anvil test were used as a reference for the comparison of experiment and computer simulation in the ANSYS LS-DYNA 3D program. Using a new developed algorithm the parameters of Johnson-Cook equation were determined to obtain the best possible agreement between deformed shapes obtained by numerical simulation and by real experiment.
Czech abstract
Příspěvek se zabývá vlivem rychlosti deformace na mechanické chování Ti-6AL-4V titanové slitiny. Po ověřovacích zkouškách za statických podmínek vzorky byly deformovány při vysokých rychlostech deformace pomocí Taylorova zařízení. Výsledky obrazové analýzy deformovaných vzorků z Taylorova zařízení byly použity jako podklad pro srovnání experimentu a počítačové simulace v programu ANSYS LS-DYNA 3D. Pomocí nově vyvinutého algoritmu byly stanoveny parametry Johnson-Cookovy rovnice, jak získat nejlepší možnou shodu mezi deformovanými tvary získané pomocí numerické simulace a reálného experimentu.
English abstract
The paper deals with the influence of strain rate on the mechanical behaviour of the Ti-6Al-4V titanium alloy. After verification tests under static loading conditions, the specimens were deformed at high strain rates using the device for the Taylor anvil test. Results of an image analysis of deformed specimens from the Taylor anvil test were used as a reference for the comparison of experiment and computer simulation in the ANSYS LS-DYNA 3D program. Using a new developed algorithm the parameters of Johnson-Cook equation were determined to obtain the best possible agreement between deformed shapes obtained by numerical simulation and by real experiment.
Keywords in Czech
konečnoprvkové modelování, konstitutivní rovnice, titanové slitiny
Keywords in English
finite element modeling, constitutive equations, titanium alloys
RIV year
2012
Released
12.09.2012
Location
Košice
ISSN
1335-1532
Volume
2012
Number
3
Pages from–to
125–132
Pages count
8
BIBTEX
@article{BUT96739,
author="Miroslav {Šlais} and Ivo {Dohnal} and Milan {Forejt},
title="Determination of Johnson-Cook equation parameters",
year="2012",
volume="2012",
number="3",
month="September",
pages="125--132",
address="Košice",
issn="1335-1532"
}