Jake Hochhalter and Mike Veilleux are currently incorporating †polycrystal plasticity into multiscale fracture simulation tools developed through funding from DARPA and NASA LaRC.
Validation Models
Currently we are modeling polycrystals that include multiple particles, where the complicated geometry is taken from experimental observation of actual aluminum microstructures. Polycrystal plasticity, to account for grain orientation, and solution of large FE models in parallel are incorporated. The CFG's recent advancements in simulation capability, of these validation models, are enabling the validation of physical models incorporated into our modeling process.
Realization Models
In addition to validation models, simulation of statistically accurate polycrystal models are crucial in our multiscale approach to fracture simulation. Currently we are modeling polycrystals that include multiple particles, which are statistical realizations of observed polycrystal morphology. Polycrystal plasticity to account for grain orientation and solution of large FE models in parallel are incorporated. The CFG's recent advancements in simulation capability, of realization models, are enabling statistically realistic models to be generated for multiscale fracture simulation.
†The polycrystal plasticity models are being developed by Professor Antoinette Maniatty and Dave Littlewood at RPI.