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

O. Oussouaddi, L. Campagne, L. Daridon, S. 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 publicationProceedings - 8th International Conference on Mechanical and Physical Behaviour of Materials under Dyanmic Loading, EURODYMAT 2006
Pages293-298
Number of pages6
DOIs
Publication statusPublished - 1 Aug 2006
Event8th International Conference on Mechanical and Physical Behaviour of Materials under Dyanmic Loading - Dijon, France
Duration: 11 Sep 200615 Sep 2006

Publication series

NameJournal De Physique. IV : JP
Volume134
ISSN (Print)1155-4339
ISSN (Electronic)1764-7177

Conference

Conference8th International Conference on Mechanical and Physical Behaviour of Materials under Dyanmic Loading
CountryFrance
CityDijon
Period11/9/0615/9/06

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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 Proceedings - 8th International Conference on Mechanical and Physical Behaviour of Materials under Dyanmic Loading, EURODYMAT 2006 (pp. 293-298). (Journal De Physique. IV : JP; Vol. 134). https://doi.org/10.1051/jp4:2006134045