The composite voxel technique for inelastic problems

We demonstrate by numerical experiments on continuously and discontinuously reinforced thermoplastics with elastoplastic matrix behavior that FFT-based computational homogenization on downsampled microstructures equipped with composite voxels produces stress-strain curves mimicking those obtained for the full resolution. For industrial sized microstructures it turns out that the computations can be accelerated by a factor of up to 40 compared to a direct parallelization of the fully resolved problem.