Enyxe: A modular framework for the elastoplastic analysis of polycrystalline materials in damask

In this work, we introduce Enyxe, the Enschede Numerical Yield Function eXploration Environment. It is a modular, open-source simulation toolkit for investigating the elastoplastic response of polycrystalline aggregates, utilizing the Düsseldorf Advanced Material Simulation Kit (Damask) as a solver backend. Implemented workflows automate the generation, execution, and interpretation of simulation jobs required for characterizing the effective plastic behavior of microstructures to investigate yield locus evolution. The onset of macroscopic yielding can be identified through various criteria including offset yield stress and plastic work density. The framework enables live monitoring of jobs through stress-strain curves, automated termination of jobs upon detection of yielding, fitting of yield function parameters, and extensive logging of job information and results, as well as re-use of existing result files when applicable. The modular architecture permits the implementation of any yield criterion, extending the choice of readily available Hill48 and Cazacu-Plunkett-Barlat (CPB06) formulations. Additional workflows facilitate the imposition of arbitrary deformation paths and homogenization of the elastic response of the investigated material microstructure.