Schröder, Jörg; Miehe, Christian:
Aspects of Computational Rate-Independent Crystal Plasticity
1997
In: Computational Materials Science, Jg. 9 (1997), Heft 1-2, S. 168 - 176
Artikel/Aufsatz in Zeitschrift / Fach: Bauwissenschaften
Titel:
Aspects of Computational Rate-Independent Crystal Plasticity
Autor(in):
Schröder, Jörg im Online-Personal- und -Vorlesungsverzeichnis LSF anzeigen; Miehe, Christian
Erscheinungsjahr:
1997
Erschienen in:
Computational Materials Science, Jg. 9 (1997), Heft 1-2, S. 168 - 176
ISSN:
Signatur der UB:

Abstract:

The paper presents a formulation of small-strain rate-independent single-crystal plasticity in the multisurface format and points out aspects of its numerical implementation. The key problem of the rate-independent formulation of single crystal plasticity is the possible occurrence of redundant constraints due to linear-dependent active slip systems. This results in a possible non-uniqueness of the set of active slip systems. In order to overcome this problem, we propose here in line with recent research developments a solution procedure for the determination of the incremental active slips based on a particularly chosen generalized inverse of the Jacobian of the active yield criterion functions. The performance and physical acceptance of the proposed formulation is demonstrated for two representative numerical model problems.