Gurson-type Elastic-Plastic Damage Model Based on Strain-Rate Plastic Potential

Abstract : Ductile damage is generally described by stress-space analytical potentials. In this contribution, it is shown that strain rate potentials, which are exact conjugate of the stress-based potentials, can be equally used to describe the dilatational response of porous metals. This framework is particularly appropriate for porous materials with matrix described by complex yield criteria for which a closed-form expression of the stress-based potential is not available. Illustration of the new approach is done for porous metals containing randomly distributed spherical voids in a von Mises elasto-plastic matrix. Furthermore, a general time integration algorithm for simulation of the mechanical response using this new formulation is developed and implemented in Abaqus/Standard. The proposed model and algorithm are validated with respect to the Abaqus built-in GTN model, which is based on a stress potential, through the simulation of a tensile test on a round bar.
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Communication dans un congrès
Yoon, JW; Stoughton, TB; Rolfe, B; Et Al.,. NUMISHEET 2014: The 9th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes, Jan 2014, Melbourne, Australia. AIP Conference Proceedings, NUMISHEET 2014: The 9th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes: Part A Benchmark Problems and Results and Part B General Papers 1567 (1), pp.464-467
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https://hal.univ-lorraine.fr/hal-01517727
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Soumis le : mercredi 3 mai 2017 - 15:28:46
Dernière modification le : mercredi 12 septembre 2018 - 01:27:31

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  • HAL Id : hal-01517727, version 1

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Tudor Balan, Oana Cazacu. Gurson-type Elastic-Plastic Damage Model Based on Strain-Rate Plastic Potential. Yoon, JW; Stoughton, TB; Rolfe, B; Et Al.,. NUMISHEET 2014: The 9th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes, Jan 2014, Melbourne, Australia. AIP Conference Proceedings, NUMISHEET 2014: The 9th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes: Part A Benchmark Problems and Results and Part B General Papers 1567 (1), pp.464-467. 〈hal-01517727〉

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