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.
Original language | English |
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Article number | 106390 |
Journal | Composites Part A: Applied Science and Manufacturing |
Volume | 145 |
Early online date | 24 Mar 2021 |
DOIs | |
Publication status | Published - 30 Jun 2021 |
Keywords
- A. Ceramic-matrix composites (CMCs)
- B. Mechanical properties
- C. Micro-mechanics
- D. CT analysis
ASJC Scopus subject areas
- Ceramics and Composites
- Mechanics of Materials