Non-linear composite voxels for FFT-based explicit modeling of slip bands: application to basal channeling in irradiated Zr alloys
| Autor: | Marano, Aldo, Gélébart, Lionel |
|---|---|
| Přispěvatelé: | Service des Recherches Métallurgiques Appliquées (SRMA), Département des Matériaux pour le Nucléaire (DMN), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Marano, Aldo |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Composite Voxels
[PHYS]Physics [physics] [PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph] [PHYS.MECA.MEMA] Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph] Crystal plasticity [PHYS.MECA.MSMECA] Physics [physics]/Mechanics [physics]/Materials and structures in mechanics [physics.class-ph] [PHYS.MECA]Physics [physics]/Mechanics [physics] [PHYS.MECA] Physics [physics]/Mechanics [physics] Irradiated metals [PHYS.MECA.MSMECA]Physics [physics]/Mechanics [physics]/Materials and structures in mechanics [physics.class-ph] Slip localization [PHYS] Physics [physics] FFT methods |
| Popis: | Explicitly modeling slip bands is a promising method to simulate the consequences of intragranular plastic slip localization on the behavior of strongly localizing crystals such as irradiated metals. In this study, we propose a very efficient framework to implement this modeling strategy based on a massively parallel FFT-based solver enhanced with composite voxels to simulate polycrystals with a regular lamellar structure alternating plastic slip bands embedded within larger elastic bands. To this end, generic composite voxel models have been formulated and implemented, allowing to extend the approach to any type of constitutive behavior in the future. In particular, we show that laminate composite voxels are particularly well suited to improve standard FFT-based solvers in this context, and enable to run polycrystalline simulations accurately accounting for slip bands whose width is two orders of magnitude below the grain size. To demonstrate the potential of this approach , we apply it to an idealized material designed to approximate basal channeling in irradiated textured Zr alloys. Varying the width and the spacing of the modeled slip bands, we show that it allows to capture the increase of grain boundary normal stress concentrations or the enhanced Bauschinger effect induced by an increased localization of plastic slip. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|