Abstract
We present a methodology of dislocation dynamics simulation of mesoscale deformation of FCC crystals under indentation. In addition to revealing the details of plastic deformation evolution under indentation loading, this work aims to compare induced local elastic strain and lattice rotation fields with the X-ray measurements of the same fields in 3D. The simulation framework consists in coupling a dislocation dynamics code with the finite element method, with the latter serving to update the crystal geometry during deformation. Nucleation of dislocations is introduced based on local elastic stability criterion that is guided by related molecular dynamics studies. The comparison between simulations and experiments involves computational coarsening of the elastic strain and lattice rotation fields of the dislocation system to match the pixel size of the X-ray data. Preliminary simulation results are presented along with X-ray data.