Orientation-guided two-scale approach for the segmentation and quantitative description of woven bundles of fibers from three-dimensional tomographic images

Automated conformal mesh generation chain for woven composites based on CT-scan images with low contrasts

“…In the case of small contact zones, the tows can be separated by identifying isolated tow sections and by joining these sections across the contact zones [29]. Another possibility is to determine the planes between the plies by analyzing the matrix distribution in the REV [40].…”

“…The labelling of the tows presents the challenge of identifying the contact zones between parallel tows. Topological information on the weaving pattern or the tow shapes may be needed [24,29]. The difficulty of the problem increases with the number of contact zones, or the compactness of the reinforcement.…”

Variational segmentation of textile composite preforms from X-ray computed tomography

“…For simple fabrics, it is sufficient to exploit this information alone [26], or combined with other statistical descriptors [27,28], to extract each yarn individually. However, for more complex cases, individual yarns still have to be separated and labeled: a sole use of image-based information leads to topological inconsistencies [29]. This is for example the case when two yarns of the same direction merge into a single entity (see e.g.…”

“…Yet, heuristics developed to arbitrarily separate the connected entities will not necessarily ensure to obtain a topologically correct model, even using ad hoc approaches (see e.g. [29]). This caveat illustrates the difficulty to conciliate image-based data with a continuous description of the yarns geometry.…”

“…These sections are then propagated using the gray level and the local direction of the yarns. This approach extends the pursuit algorithm pro-posed by [29] by introducing an initial manual step that guarantees a topologically correct model. A fully automatized image-based approach appears yet to be impracticable for complex fabrics: it still needs to be guided by at least some prior knowledge of the weaving pattern and by geometric assumptions.…”