A crystal plasticity and phase-field fracture material law is implemented in the MFront code generator (https://tfel.sourceforge.net/). This constitutive behavior is specifically designed for BCC materials.
The material behavior and parameters are described in the companion paper: Scherer, Jean-Michel, Ramesh, Mythreyi, Bourdin, Blaise, Bhattacharya, Kaushik. Grain-size dependence of plastic-brittle transgranular fracture. (2025) Journal of the Mechanics and Physics of Solids (https://doi.org/10.1016/j.jmps.2025.106116).
The resolution scheme, materials parameters and state variables are described in the README file.
The .mfront file should be compiled using the following command:
mfront --obuild --interface=generic BCC_CrystalPlasticity_PhaseFieldFracture.mfront