Felix Fritzen fritzen@simtech.uni-stuttgart.de
S. Keshav, F. Fritzen, M. Kabel: FFT-based Homogenization at Finite Strains using Composite Boxels (ComBo), published in Computational Mechanics 71, p. 191-212, 2023 (final article: https://doi.org/10.1007/s00466-022-02232-4 (Open Access))
Composite Voxels (cf. Kabel (2015)) have shown to be a meaningful addition to the successful range of FFT-based solvers going back to the seminal work Moulinec (1998). In essence, a high resolution regular grid can benefit from coarse-graining and processing voxels on the interface of adjacent materials via classical laminate theory building on the established Hadamard compatibility and jump conditions.
This software offers a simple yet accurate method for the computation of the coarse-grained structure alongside the normal vectors. HDF5 files are accepted as inputs. A comprehensive API is provided and examples are given within jupyter notebooks. The results can easily post-processed in paraview and a direct HDF5 export is part of the offered utility. Instructions for the postprocessing are contained in the jupyter notebook including a short tutorial video.
(Moulinec (1998)) H. Moulinec, P. Suquet: A numerical method for computing the overall response of nonlinear composites with complex microstructure, Computer Methods in Applied Mechanics and Engineering 157, p. 69-94, DOI: https://doi.org/10.1016/S0045-7825(97)00218-1.
(Kabel (2015)) M. Kabel, D. Merkert, M. Schneider: Use of composite voxels in FFT-based homogenization, Computer Methods in Applied Mechanics and Engineering 294, p. 168/188, DOI: https://doi.org/10.1016/j.cma.2015.06.003
The software is released under a 2 clause FreeBSD license, see LICENSE file.