Version 1
: Received: 28 October 2024 / Approved: 29 October 2024 / Online: 29 October 2024 (10:42:36 CET)
How to cite:
Lamon, J. The Ultimate Tensile Strength of SiC/SiC Composites: Multiscale Approach. Preprints2024, 2024102270. https://doi.org/10.20944/preprints202410.2270.v1
Lamon, J. The Ultimate Tensile Strength of SiC/SiC Composites: Multiscale Approach. Preprints 2024, 2024102270. https://doi.org/10.20944/preprints202410.2270.v1
Lamon, J. The Ultimate Tensile Strength of SiC/SiC Composites: Multiscale Approach. Preprints2024, 2024102270. https://doi.org/10.20944/preprints202410.2270.v1
APA Style
Lamon, J. (2024). The Ultimate Tensile Strength of SiC/SiC Composites: Multiscale Approach. Preprints. https://doi.org/10.20944/preprints202410.2270.v1
Chicago/Turabian Style
Lamon, J. 2024 "The Ultimate Tensile Strength of SiC/SiC Composites: Multiscale Approach" Preprints. https://doi.org/10.20944/preprints202410.2270.v1
Abstract
: The present paper tackles the important issue of tensile ultimate strength of ceramic matrix composites, using a multiscale approach. The ultimate strength is investigated at the successive increasing length scales inherent to 2D woven SiC/SiC composites, i.e. single filaments, fiber tow, minicomposites reinforced with a single tow, and 2D woven composite. First experimental results on tensile behavior under strain-controlled conditions are summarized for tows, minicomposites and composites. Then, models of tow ultimate failure under controlled force and strain are presented. A criterion of tow failure is developed for filament fracture initiation and then propagation based on applied stress and on filament strength gradient. The model of ultimate failure of minicomposite under strain-controlled condition is based on the strength of filaments in the presence of matrix cracks and the overstress induced by interactions of broken filaments and the matrix. The variability of ultimate strengths of filaments, minicomposites and composites at various gauge lengths is described by linear p-quantile diagrams which indicates that the data follow normal distribution function. The contribution of structural effects to variability of composite and minicomposite strength under strain-controlled loading is analyzed. Their dependence on specimen size is related to reproducibility of critical flaw population and structural effects.
Keywords
1; ceramic matrix composites 2; strength 3; fracture 4; normal distribution 5; Weibull
Subject
Chemistry and Materials Science, Ceramics and Composites
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
