A numerical study of reversible plasticity using continuum dislocation mechanics
| Autor: | Stéphane Berbenni, Ricardo A. Lebensohn |
|---|---|
| Přispěvatelé: | Labex DAMAS, Université de Lorraine (UL), Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux (LEM3), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM), Theoretical Division [LANL], Los Alamos National Laboratory (LANL) |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Field (physics) Hardening mechanisms Bauschinger effect 02 engineering and technology Mechanics geometrically-necessary dislocations Plasticity 021001 nanoscience & nanotechnology Microstructure 01 natural sciences FFT [PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph] Matrix (mathematics) size effect Phase (matter) 0103 physical sciences Hardening (metallurgy) Dislocation 010306 general physics 0210 nano-technology |
| Zdroj: | Comptes Rendus. Physique Comptes Rendus. Physique, Académie des sciences (Paris), 2021, 22 (S3), pp.1-18. ⟨10.5802/crphys.54⟩ |
| ISSN: | 1631-0705 1878-1535 |
| Popis: | International audience; In this contribution, an elasto-viscoplastic fast Fourier transform-based (EVPFFT) numerical implementation of the Mesoscale Field Dislocation Mechanics (MFDM) formulation, called MFDM-EVPFFT, is applied to study the reversible plastic behavior of periodic two-phase crystalline composites with an elastoviscoplastic plastic matrix and a purely elastic second phase. Periodic laminate microstructures of this kind with different periods (i.e. sizes) are considered to examine the size dependence of the Bauschinger effect and hardening during cyclic loading. Comparisons with classic composite effects obtained with conventional crystal plasticity are discussed. Specifically, the MFDM-EVPFFT results shed light on the hardening mechanisms due to piling-up/unpiling-up of geometrically-necessary dislocations (GND) during reverse loading. |
| Databáze: | OpenAIRE |
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