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A computational study of a model of single-crystal strain-gradient viscoplasticity with an interactive hardening relation
Publikationstyp
Journal Article
Date Issued
2014-03-31
Sprache
English
TORE-URI
Volume
51
Issue
15-16
Start Page
2754
End Page
2764
Citation
International Journal of Solids and Structures 51 (15-16): 2754-2764 (2014)
Publisher DOI
Scopus ID
Publisher
Elsevier
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.
Subjects
Interactive hardening relation
Latent hardening
Polycrystal
Single-crystal strain-gradient viscoplasticity
DDC Class
004: Informatik
500: Naturwissenschaften
530: Physik
540: Chemie
Funding Organisations
More 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.
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.
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.