Nonlinear kinematics capable of resolving large (or finite) strains and large rotations
Polycrystals can be deformed to small strains (elastic regime, elastic-plastic transition) or large strains, up to values of ~0.4, or even more with the aid of re-meshing (via Neper)
Anisotropic elasticity based on crystal symmetry (cubic and hexagonal)
Anisotropic / crystal plasticity
Rate-dependent slip restricted to dominant slip systems
Isotropic or latent hardenings (interaction matrix)
FCC, BCC and HCP slip systems
Multiphase polycrystals (e.g. BCC/HCP) can be simulated.
State variable evolution for crystal lattice orientation and slip system strengths
Robust numerical methodologies with a data parallel implementation via Message Passing Interface (MPI) routines
Simulations can be run in parallel on 1,000+ cores, making it suitable to routinely handle 1,000 to 10,000-grain polycrystals meshed into 3M+ elements. The code can also be run in serial for testing or small simulations.
Generalized boundary conditions with an assortment of standard boundary conditions
Standard or custom boundary conditions
Uniaxial and multiaxial loadings, either strain or load-controlled
Monotonic or cyclic loadings
The loading is defined as steps which prescribe specific strain or load targets.
Wide array of output results
Users can request a variety of output to be print to file, including (but not limited to) stress and strain tensors, crystal orientation, deformation rates, and work.
All input files to FEPX are prescribed non-interactively, using command lines and / or ASCII files. FEPX is written in Fortran 90/95, requires an MPI installation (OpenMPI preferred and tested), and can be compiled (via CMake) and run on any Unix-like system (including MacOS).