Title: Fiber Alignment Evaluation Through X-Ray Computed Tomography
Authors: Jennifer M. Sietins, Daniel B. Knorr Jr., and Jessica C. Sun
Abstract: High fiber alignment in composites made from discontinuous fibers is well known to be critical for improved tensile strength in the fiber direction. Advances in laboratory X-ray micro-computed tomography (CT) systems have enabled the three-dimensional visualization of composites at a high enough resolution to quantitatively measure fiber orientations. CT scan settings were optimized for improved image quality and important scanning considerations are discussed. Volume Graphics software was utilized to quantify carbon fiber orientations, and the results were independently validated through optical microscopy. Additionally, results of a sensitivity analysis for various software parameters and thresholding levels will be presented. This paper summarizes the methodology of a new technique for quantifying fiber orientations from high resolution CT scans and potential applications are discussed.
References: 1. Creighton, C. J., Sutcliffe, M. P. F., Clyne, T. W. A multiple field image analysis procedure for characterization of fibre alignment in composites. Composites Part A: Applied Science and Manufacturing 32 (2001) 221-229. 2. Eberhardt, C. Clarke, A. Fibre-orientation measurements in short-glass-fibre composites. Part I: automated, high-angular-resolution measurement by confocal microscopy Composites Science and Technology 61 (2001) 1389-1400. 3. Bricker, S. Simmons, J. P., Przybyla, C., Hardie, R. C. Anomaly detection of microstructural defects in continuous fiber reinforced composites. Proceedings of the SPIE/IS&T Electronic Imaging Volume 9401, Computational Imagining XIII (2015). 4. Emerson et al. Individual fibre segmentation from 3D X-ray computed tomography for characterizing the fibre orientation in unidirectional materials Composites Part A: Applied Science and Manufacturing 97 (2017) 83-92. 5. Czabaj, M. W., Riccio, M. L., Whitacre, W. W. Numerical reconstruction of graphite/epoxy composite microstructure based on sub-micron resolution X-ray computed tomography Composites Science and Technology 105 (2014) 174-182. 6. HexTow® IM7 Product Datasheet accessed at https://www.hexcel.com/user_area/content_media/raw/IM7_HexTow_DataSheet.pdf on January, 10 2019. 7. Patterson, B., Escobedo-Diaz, J., Dennis-Koller, D., Cerreta, E. Dimensional quantification of embedded voids or objects in three dimensions using X-ray tomography. Microscopy and Microanalysis 18 (2012) 390-398. 8. Bigun, J., Bigun, T., Nilsson, K. Recognition by symmetry derivatives and the generalized structure tensor, IEEE Transactions on Pattern Analysis and Machine Intelligence 26 (2004) 1590-1605. 9. Morill et al., A validated software application to measure fiber organization in soft tissue. Biomechanics and Modeling in Mechanobiology 15 (2016) 1467-1478. 10. Frahs et al., Extracellular Matrix Expression and Production in Fibroblast-Collagen Gels: Towards an In Vitro Model for Ligament Would Healing, Annals of Biomedical Engineering, Nov. 2018, v. 46, issue 11, pp. 1882-1895.
Conference: SAMPE 2019 - Charlotte, NC
Publication Date: 2019/05/20
Price: FREEGet This Paper