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A numerical study of reversible plasticity using continuum dislocation mechanics

Journal Article · · Comptes Rendus. Physique
DOI:https://doi.org/10.5802/crphys.54· OSTI ID:1840890
 [1];  [2]
  1. Univ. de Lorraine, Metz (France); Univ. de Lorraine, Metz (France). Laboratory of Excellence on Design of Alloy Metals for low-mAss Structures (DAMAS)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
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 elasto-viscoplastic plastic matrix and a purely elastic second phase. Additionally, 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.
Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program; National Research Agency (ANR)
Grant/Contract Number:
89233218CNA000001
OSTI ID:
1840890
Report Number(s):
LA-UR--21-32396
Journal Information:
Comptes Rendus. Physique, Journal Name: Comptes Rendus. Physique Journal Issue: S3 Vol. 22; ISSN 1878-1535
Publisher:
l'Academie des sciencesCopyright Statement
Country of Publication:
United States
Language:
English

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