Commit 2017-04-XX

Extension of the mixed hardening framework developed in EvpMixtHHypoMaterial material to consider .

Extension of

• ArmstrongFrederickKinematicHardening
• DruckerPragerKinematicHardening

Nonlinear kinematic hardening adapted from the two-surface developed by Yoshida et al., 2002

$$\dot{X}_{ij}^{yu} = C \left( \dfrac{2}{3}\,a\,D_{ij}^{vp} - \left( \dfrac{\overline{X}_{ij}^{yu}}{\overline{\sigma}} \right)^{\zeta-1}\, \dot{\bar{\varepsilon}}\, X_{ij}^{yu} \right)$$

where $\overline{X}_{yu}^{ij}$ and $\overline{\sigma}$ are the equivalent backstress and the equivalent stress, respectively, which are computed based on the selected yield criterion.

I have performed a tab cleaning service (~60 files).

[a]: YoshidaUemori02KinematicHardening.cpp
[a]: YoshidaUemori02KinematicHardening.h
[r]:

[a]: Hill48v2IsoMixHard.py
[a]: Hill48v2MixHard.py
[a]: YoshidaUemori02CinHEp.py
[r]: 

— Cristian 2017/04/XX