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3D detection and quantitative characterization of cracks in a ceramic matrix composite tube using X-ray computed tomography

Authors
  • Chen, Y.
  • Gélébart, Lionel
  • Chateau, Camille
  • Bornert, Michel
  • King, A.
  • Aimedieu, Patrick
  • Sauder, Cédric
Publication Date
Mar 01, 2020
Identifiers
DOI: 10.1007/s11340-019-00557-5
OAI: oai:HAL:hal-02557516v1
Source
HAL-Descartes
Keywords
Language
English
License
Unknown
External links

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.

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