In:
PAMM, Wiley, Vol. 8, No. 1 ( 2008-12), p. 10467-10468
Abstract:
A viscoplastic material model of overstress type is analyzed. The model is based on the kinematic assumption of a double multiplicative split in order to simulate a nonlinear kinematic hardening. We investigate theoretically and numerically two implicit time–stepping methods, which were used lately in engineering literature to integrate the evolution equations in the context of multiplicative plasticity/viscoplasticity. A common feature of both methods is that the plastic incompressibility constraint is exactly satisfied. Moreover, we show that both methods preserve the symmetry of internal variables, which is inherent to the problem. According to testing results, both methods are equivalent regarding robustness, accuracy, and computational efficiency. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Type of Medium:
Online Resource
ISSN:
1617-7061
,
1617-7061
DOI:
10.1002/pamm.200810467
Language:
English
Publisher:
Wiley
Publication Date:
2008
detail.hit.zdb_id:
2078931-2