1 3D detection and quantitative characterization of cracks in a ceramic matrix composite tube using X-ray computed tomography Y. Chen 1,2, , L. Gélébart 1 , C. Chateau 2 , M. Bornert 2 , A. King 3 , P. Aimedieu 2 , C. Sauder 1 1 DEN-Service de Recherches Métallurgiques Appliquées, CEA, Université Paris- Saclay, F-91191, Gif-sur-Yvette, France 2 Laboratoire Navier (UMR 8205), CNRS, ENPC, IFSTTAR, Université Paris-Est, F- 77455 Marne-la-Vallée, France 3 Synchrotron SOLEIL, St-Aubin 91192, France Abstract Cracks play an essential role in the degradation of the thermomechanical behavior of ceramic matrix composites. However, characterizing their complex 3D geometries within a complex microstructure is still a challenge. This paper presents a series of procedures, based on X-ray tomographic images, to evaluate the applied 3D strains, including their through-thickness gradients, and to detect and quantify the induced crack networks in ceramic matrix composites. Digital volume correlation and some dedicated image processing algorithms are employed. A novel method is proposed to estimate the opening, orientation and surface area of the detected cracks. The proposed procedures are applied to the images of a SiC/SiC composite tube that has been tested in situ under uniaxial tension with synchrotron X-ray computed tomography. Keywords: Ceramic matrix composites (CMCs); Damage mechanisms; X-ray computed tomography; Crack quantification NOTICE: This is a post-peer-review, pre-copyedit version of an article published in Experimental Mechanics. The final authenticated version is available online at: https://doi.org/10.1007/s11340-019-00557-5. Corresponding author, Email: [email protected]
3D detection and quantitative characterization of cracks in a ceramic matrix composite tube using X-ray computed tomography
May 17, 2023
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