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Generation of micro-scale finite element models from synchrotron X-ray CT images for multidirectional carbon fibre reinforced composites

DOI: 10.1016/j.compositesa.2016.09.010 DOI Help

Authors: R. M. Sencu (School of Mechanical, Aerospace and Civil Engineering, University of Manchester) , Z. Yang (Centre for Low Impact Buildings, Faculty of Engineering and Computing, Coventry University) , Y. C. Wang (School of Mechanical, Aerospace and Civil Engineering, University of Manchester) , P. J. Withers (Henry Moseley X-ray Imaging Facility, School of Materials, University of Manchester) , C. Rau (Diamond Light Source) , A. Parson (Diamond Light Source) , C. Soutis (Aerospace Research Institute, University of Manchester)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Composites Part A: Applied Science And Manufacturing , VOL 91 , PAGES 85 - 95

State: Published (Approved)
Published: December 2016
Diamond Proposal Number(s): 10456

Abstract: This paper develops a new fibre tracking algorithm to efficiently locate fibre centrelines (skeletons), from X-ray Computed Tomography (X-ray CT) images of carbon fibre reinforced polymer (CFRP), which are then used to generate micro-scale finite element models. Three-dimensional images with 330 nm voxel resolution of multidirectional [+45/90/−45/0] CFRP specimens were obtained by fast synchrotron X-ray CT scanning. Conventional image processing techniques, such as a combination of filters, delineation of plies, binarisation of images, and fibre identification by local maxima and ultimate eroding points, were tried first but found insufficient to produce continuous fibre centrelines for segmentation, especially in regions with highly congested fibres. The new algorithm uses a global overlapping stack filtering step followed by a local fibre tracking step. Both steps are based on the Bayesian inference theory. The new algorithm is found capable of efficiently define fibre centrelines for the generation of micro-scale finite element models with high fidelity.

Journal Keywords: Carbon fibres; Microstructures; Finite element analysis (FEA); CT analysis

Subject Areas: Engineering, Materials

Instruments: I13-2-Diamond Manchester Imaging