 |
|
The implementation can be found in Marmot::Materials::B4.
The present model is based on the B4 model proposed by Bazant et al. [Bazant2015] generalized to 3D. The constitutive law is given in total form as
\[ \displaystyle \sig = \Cel : \epsE = \Cel : \left( \eps - \epsVE - \epsF - \epsDC -\epsSHR \right), \]
relating the nominal stress tensor \( \sig \) to the elastic strain tensor \( \epsE \) in terms of the fourth order stiffness tensor \( \Cel \). The rate equations decribing the evolution of the respective strain components can be found a recent publication by Dummer et al. [Dummer2022]. However, nonlinear creep is not accounted for in the present formulation.