In a non-linear, implicit Process (2D), I start with anisotropic Settings and three E-Moduli for the three Directions of Freedom. When I use a hardening Model in ANSYS (Kinematic Hardening or Isotropic...), will that cause Anisotropy during the Simulation-Process? Will it be taken into account during the calculation?
Thx in advance
I´ve done some research now and can say:
Isotropy (the E-Modules) don´t really change that much after deformation, idealistically. Extremely large deformation (e.g. rolling of sheets) does however in fact cause anisotropic behavior.
This behavior is however NOT implemented in commerial modern Finite Element Software.
A theoretical model with yield surface distortion, which is able to model the anisotropy induced by previous plastic deformation is discreted by Vincent in:
L. & Calloch, S. & Marquis, D. (2004). A general cyclic plasticity model taking
intoaccount yield surface distortion for multiaxial ratchetting. International Journal
of Plasticity 20, p.1817–1850.
Article A general cyclic plasticity model taking into account yield ...
Update: There are laws of "distortional hardening" that can be programmed in Mathematica and transferred between Mathematica and ABAQUS.
Source:
http://digbib.ubka.uni-karlsruhe.de/volltexte/1000003670 Page 74
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