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An explicit integration scheme for hypo-elastic viscoplastic crystal plasticity

Abstract

An explicit integration scheme for rate-dependent crystal plasticity (CP) has been developed in this work. Additive decomposition of the velocity gradient tensor into lattice and plastic parts is adopted for describing the kinematics; the Cauchy stress is calculated by using a hypo-elastic formulation, applying the Jaumann stress rate. This CP scheme has been implemented into a commercial finite element code (CPFEM). Uniaxial compression and rolling processes are simulated. The results showed good accuracy and reliability of the integration scheme. The results were compared to simulations using the hyper-elastic viscoplastic implementation by Dumoulin et al [1], involving multiplicative decomposition of the deformation gradient tensor. It was found that the hypo-elastic implementation is only slightly faster and has a similar accuracy as the hyper-elastic formulation.

Category

Academic article

Client

  • Research Council of Norway (RCN) / 174834

Language

English

Author(s)

Affiliation

  • Norwegian University of Science and Technology
  • SINTEF Industry / Materials and Nanotechnology

Year

2014

Published in

Transactions of Nonferrous Metals Society of China

ISSN

1003-6326

Publisher

Elsevier

Volume

24

Issue

7

Page(s)

2401 - 2407

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