A physically-based and fully coupled model of elasto-plasticity and damage for dynamic failure in ductile metals

O. Oussouaddi, L. Campagne, L. Daridon, Said Ahzi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

It is well established that spall fracture and other rapid failures in ductile materials are often dominated by nucleation and growth of micro-voids. In the present work, a mechanistic model for failure by cumulative nucleation and growth of voids is fully coupled with the thermo-elastoplastic constitutive equations of the Mechanical Threshold Stress (MTS) which is used to model the evolution of the flow stress. The damage modeling includes both ductile and brittle mechanisms. It accounts for the effects of inertia, rate sensitivity, fracture surface energy, and nucleation frequency. The MTS model used for plasticity includes the superposition of different thermal activation barriers for dislocation motion. Results obtained in the case of uncoupled and coupled model of plasticity and damage from the simulations of the planar impact with cylindrical target, are presented and compared with the experimental results for OFHC copper. This comparison shows the model capabilities in predicting the experimentally measured free surface velocity profile as well as the observed spall and other damage patterns in the material under impact loading. These results are obtained using the finite element code Abaqus/Explicit.

Original languageEnglish
Title of host publicationJournal De Physique. IV : JP
Pages293-298
Number of pages6
Volume134
DOIs
Publication statusPublished - Aug 2006
Externally publishedYes
Event8th International Conference on Mechanical and Physical Behaviour of Materials under Dyanmic Loading - Dijon
Duration: 11 Sep 200615 Sep 2006

Other

Other8th International Conference on Mechanical and Physical Behaviour of Materials under Dyanmic Loading
CityDijon
Period11/9/0615/9/06

Fingerprint

plastic properties
damage
metals
nucleation
voids
thresholds
constitutive equations
inertia
surface energy
velocity distribution
activation
copper
simulation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Oussouaddi, O., Campagne, L., Daridon, L., & Ahzi, S. (2006). A physically-based and fully coupled model of elasto-plasticity and damage for dynamic failure in ductile metals. In Journal De Physique. IV : JP (Vol. 134, pp. 293-298) https://doi.org/10.1051/jp4:2006134045

A physically-based and fully coupled model of elasto-plasticity and damage for dynamic failure in ductile metals. / Oussouaddi, O.; Campagne, L.; Daridon, L.; Ahzi, Said.

Journal De Physique. IV : JP. Vol. 134 2006. p. 293-298.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Oussouaddi, O, Campagne, L, Daridon, L & Ahzi, S 2006, A physically-based and fully coupled model of elasto-plasticity and damage for dynamic failure in ductile metals. in Journal De Physique. IV : JP. vol. 134, pp. 293-298, 8th International Conference on Mechanical and Physical Behaviour of Materials under Dyanmic Loading, Dijon, 11/9/06. https://doi.org/10.1051/jp4:2006134045
Oussouaddi, O. ; Campagne, L. ; Daridon, L. ; Ahzi, Said. / A physically-based and fully coupled model of elasto-plasticity and damage for dynamic failure in ductile metals. Journal De Physique. IV : JP. Vol. 134 2006. pp. 293-298
@inproceedings{6e771733e443461d973f071c48bdf6ab,
title = "A physically-based and fully coupled model of elasto-plasticity and damage for dynamic failure in ductile metals",
abstract = "It is well established that spall fracture and other rapid failures in ductile materials are often dominated by nucleation and growth of micro-voids. In the present work, a mechanistic model for failure by cumulative nucleation and growth of voids is fully coupled with the thermo-elastoplastic constitutive equations of the Mechanical Threshold Stress (MTS) which is used to model the evolution of the flow stress. The damage modeling includes both ductile and brittle mechanisms. It accounts for the effects of inertia, rate sensitivity, fracture surface energy, and nucleation frequency. The MTS model used for plasticity includes the superposition of different thermal activation barriers for dislocation motion. Results obtained in the case of uncoupled and coupled model of plasticity and damage from the simulations of the planar impact with cylindrical target, are presented and compared with the experimental results for OFHC copper. This comparison shows the model capabilities in predicting the experimentally measured free surface velocity profile as well as the observed spall and other damage patterns in the material under impact loading. These results are obtained using the finite element code Abaqus/Explicit.",
author = "O. Oussouaddi and L. Campagne and L. Daridon and Said Ahzi",
year = "2006",
month = "8",
doi = "10.1051/jp4:2006134045",
language = "English",
isbn = "2868839444",
volume = "134",
pages = "293--298",
booktitle = "Journal De Physique. IV : JP",

}

TY - GEN

T1 - A physically-based and fully coupled model of elasto-plasticity and damage for dynamic failure in ductile metals

AU - Oussouaddi, O.

AU - Campagne, L.

AU - Daridon, L.

AU - Ahzi, Said

PY - 2006/8

Y1 - 2006/8

N2 - It is well established that spall fracture and other rapid failures in ductile materials are often dominated by nucleation and growth of micro-voids. In the present work, a mechanistic model for failure by cumulative nucleation and growth of voids is fully coupled with the thermo-elastoplastic constitutive equations of the Mechanical Threshold Stress (MTS) which is used to model the evolution of the flow stress. The damage modeling includes both ductile and brittle mechanisms. It accounts for the effects of inertia, rate sensitivity, fracture surface energy, and nucleation frequency. The MTS model used for plasticity includes the superposition of different thermal activation barriers for dislocation motion. Results obtained in the case of uncoupled and coupled model of plasticity and damage from the simulations of the planar impact with cylindrical target, are presented and compared with the experimental results for OFHC copper. This comparison shows the model capabilities in predicting the experimentally measured free surface velocity profile as well as the observed spall and other damage patterns in the material under impact loading. These results are obtained using the finite element code Abaqus/Explicit.

AB - It is well established that spall fracture and other rapid failures in ductile materials are often dominated by nucleation and growth of micro-voids. In the present work, a mechanistic model for failure by cumulative nucleation and growth of voids is fully coupled with the thermo-elastoplastic constitutive equations of the Mechanical Threshold Stress (MTS) which is used to model the evolution of the flow stress. The damage modeling includes both ductile and brittle mechanisms. It accounts for the effects of inertia, rate sensitivity, fracture surface energy, and nucleation frequency. The MTS model used for plasticity includes the superposition of different thermal activation barriers for dislocation motion. Results obtained in the case of uncoupled and coupled model of plasticity and damage from the simulations of the planar impact with cylindrical target, are presented and compared with the experimental results for OFHC copper. This comparison shows the model capabilities in predicting the experimentally measured free surface velocity profile as well as the observed spall and other damage patterns in the material under impact loading. These results are obtained using the finite element code Abaqus/Explicit.

UR - http://www.scopus.com/inward/record.url?scp=33750575372&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33750575372&partnerID=8YFLogxK

U2 - 10.1051/jp4:2006134045

DO - 10.1051/jp4:2006134045

M3 - Conference contribution

AN - SCOPUS:33750575372

SN - 2868839444

SN - 9782868839442

VL - 134

SP - 293

EP - 298

BT - Journal De Physique. IV : JP

ER -