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In situ X-ray tomography characterisation of 3D deformation of C/C-SiC composites loaded under tension

Abstract : C/C-SiC composites fabricated through Liquid Silicon Infiltration were tested under monotonic tension with in situ X-ray computed tomography. The specimens had different fibre orientations with respect to the tensile direction, 0◦/90◦ and ±45◦, such that the tension accounted for in-axis and off-axis loads, respectively. The 3D XCT images provided explicit visualisations and quantitative measurements of the distributions of SiC-Si and the orientations of the C fibre bundles. The full-field displacement and strain fields were measured by Digital Volume Correlation, observing a difference in the local deformations in response to the in-axis and off-axis loading. In both specimens, the tensile load triggered significant strain localisations at low stress (<50 MPa). Strong local deformations, observed at both low and high applied stresses, were mostly in the through-thickness direction, indicating local delamination. These observations show the importance of residual stresses to damage development in C/C-SiC composites.
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https://hal-enpc.archives-ouvertes.fr/hal-03318660
Contributeur : Camille Chateau <>
Soumis le : mardi 10 août 2021 - 15:36:54
Dernière modification le : mercredi 11 août 2021 - 03:27:14

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Yang Chen, Yuan Shi, Camille Chateau, James Marrow. In situ X-ray tomography characterisation of 3D deformation of C/C-SiC composites loaded under tension. Composites Part A: Applied Science and Manufacturing, Elsevier, 2021, 145, pp.106390. ⟨10.1016/j.compositesa.2021.106390⟩. ⟨hal-03318660⟩

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