TY - JOUR

T1 - A computational study of a model of single-crystal strain-gradient viscoplasticity with an interactive hardening relation

AU - Bargmann, Swantje

AU - Reddy, B. Daya

AU - Klusemann, Benjamin

N1 - Funding Information: B.D.R. was supported through the South African Research Chair in Computational Mechanics by the Department of Science and Technology and the National Research Foundation. This support is gratefully acknowledged. Funding Information: Part of this research was done while S.B. visited the Centre for Research in Computational and Applied Mechanics, University of Cape Town, whose hospitality is gratefully acknowledged. S.B. was supported by the German Science Foundation (DFG), contract PAK 250 (BA 3951/2), which is gratefully acknowledged.

PY - 2014/8/1

Y1 - 2014/8/1

N2 - The behavior of a model of single-crystal strain-gradient viscoplasticity is investigated. The model is an extension of a rate-independent version, and includes a new hardening relation that has recently been proposed in the small-deformation context (Gurtin and Reddy, 2014), and which accounts for slip-system interactions due to self and latent hardening. Energetic and dissipative effects, each with its corresponding length scale, are included. Numerical results are presented for a single crystal with single and multiple slip systems, as well as an ensemble of grains. These results provide a clear illustration of the effects of accounting for slip-system interactions.

AB - The behavior of a model of single-crystal strain-gradient viscoplasticity is investigated. The model is an extension of a rate-independent version, and includes a new hardening relation that has recently been proposed in the small-deformation context (Gurtin and Reddy, 2014), and which accounts for slip-system interactions due to self and latent hardening. Energetic and dissipative effects, each with its corresponding length scale, are included. Numerical results are presented for a single crystal with single and multiple slip systems, as well as an ensemble of grains. These results provide a clear illustration of the effects of accounting for slip-system interactions.

KW - Engineering

KW - Interactive hardening relation

KW - Latent hardening

KW - Polycrystal

KW - Single-crystal strain-gradient viscoplasticity

UR - http://www.scopus.com/inward/record.url?scp=84901592287&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/bc62a060-b856-34aa-a6b2-b9b47323d0bf/

U2 - 10.1016/j.ijsolstr.2014.03.010

DO - 10.1016/j.ijsolstr.2014.03.010

M3 - Journal articles

AN - SCOPUS:84901592287

VL - 51

SP - 2754

EP - 2764

JO - International Journal of Solids and Structures

JF - International Journal of Solids and Structures

SN - 0020-7683

IS - 15-16

ER -