Benchmark exercise on image-based permeability determination of engineering textiles: Microscale predictions

Permeability measurements of engineering textiles exhibit large variability as no standardization method currently exists; numerical permeability prediction is thus an attractive alternative. It has all advantages virtual material characterization, including the possibility to study impact and small-scale parameters. This paper presents results international benchmark, which a first contribution predictions for fibrous reinforcements based on real images. In this stage, focus was microscale computation fiber bundle permeability. total 16 participants provided 50 using different methods, boundary conditions, identification techniques. The scatter predicted axial after elimination inconsistent found be smaller (14%) than that transverse (∼24%). Dominant effects were conditions in tangential direction, number sub-domains used renormalization approach, technique.