Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 69, Issue -, Pages 150-158Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2014.11.016
Keywords
Fabrics/textiles; Directional orientation; Non-destructive testing
Funding
- European Union [ACP2-GA-2012-314562-QUICOM]
- Hercules Foundation [AKUL 09/001]
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X-ray computed tomography provides an opportunity for a detailed examination of the inner structure of fibre reinforced composites. Three-dimensional images, obtained with micro-CT, can be used for a realistic modelling of composite materials. All modelling objectives imply the knowledge of the orientations of the fibres inside the composite, which determine the local (anisotropic) properties. This paper investigates application of the structure tensor, a concept from the image processing field, to the determination of the orientations of fibres and to segment the image into the material's components, for the purpose of an automatic generation of a voxel-based description of the representative volume element. The segmentation of the images of CFRP materials into its components is performed by thresholding, or by clustering in a two-dimensional parameter space of the degree of anisotropy and average grey value or one of the components of the orientation vector. Clustering allows not only separating the matrix from the yarns, but also distinguishing the yarns of different primary orientations. (C) 2014 Elsevier Ltd. All rights reserved.
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