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10.3390/ma19020307
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Predictive Constitutive Modelling of Oxidation-Induced Degradation in 2.5D Woven C/SiC Composites

by
Tao Wu
1,2,
Yukang Wang
1,2,
Wenxuan Qi
1,2,*,
Xingling Luo
1,2,*,
Peng Luo
1,2,
Xiguang Gao
1,2,3 and
Yingdong Song
1,2,4
1
Jiangsu Province Key Laboratory of Aerospace Power System, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
2
Key Laboratory of Fundamental Science for National Defense-Advanced Design Technology of Flight Vehicle, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
3
Key Laboratory of Aero-Engine Thermal Environment and Structure, Ministry of Industry and Information Technology, Nanjing 210016, China
4
State Key Laboratory of Mechanics and Control Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
*
Authors to whom correspondence should be addressed.
Materials 2026, 19(2), 307; https://doi.org/10.3390/ma19020307
Submission received: 10 December 2025 / Revised: 6 January 2026 / Accepted: 9 January 2026 / Published: 12 January 2026
(This article belongs to the Section Advanced Composites)
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Abstract

Oxidation can lead to intrinsic degradation and loss in the load-bearing capacity of ceramic matrix composites (CMCs) in high-temperature service, thereby compromising structural integrity and operational safety. To elucidate the mechanism of its oxidation effects, this study predicted the oxygen diffusion coefficient within 2.5D woven C/SiC fibre bundles based on gas diffusion and oxidation kinetics theory, and subsequently constructed a meso-scale constitutive model incorporating oxidation damage and fibre defect distribution. Furthermore, a micro-scale framework for yarns was established by integrating interfacial slip behaviour, and an RVE model for 2.5D woven C/SiC was constructed based on X-ray computed tomography reconstruction of the actual microstructure. Building upon this foundation, an oxidation constitutive model applicable to loading–unloading cycles was proposed and validated through high-temperature oxidation tests at 700 °C, 900 °C, and 1100 °C. Results demonstrate that this model effectively characterizes the strength degradation and stiffness reduction caused by oxidation, enabling prediction of CMCs’ mechanical properties under oxidizing conditions and providing a physics-based foundation for the reliable design and life assessment of C/SiC components operating in oxidizing environments.
Keywords: C/SiC composites; oxidative damage; constitutive model; high-temperature mechanical properties; RVE model C/SiC composites; oxidative damage; constitutive model; high-temperature mechanical properties; RVE model
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MDPI and ACS Style

Wu, T.; Wang, Y.; Qi, W.; Luo, X.; Luo, P.; Gao, X.; Song, Y. Predictive Constitutive Modelling of Oxidation-Induced Degradation in 2.5D Woven C/SiC Composites. Materials 2026, 19, 307. https://doi.org/10.3390/ma19020307

AMA Style

Wu T, Wang Y, Qi W, Luo X, Luo P, Gao X, Song Y. Predictive Constitutive Modelling of Oxidation-Induced Degradation in 2.5D Woven C/SiC Composites. Materials. 2026; 19(2):307. https://doi.org/10.3390/ma19020307

Chicago/Turabian Style

Wu, Tao, Yukang Wang, Wenxuan Qi, Xingling Luo, Peng Luo, Xiguang Gao, and Yingdong Song. 2026. "Predictive Constitutive Modelling of Oxidation-Induced Degradation in 2.5D Woven C/SiC Composites" Materials 19, no. 2: 307. https://doi.org/10.3390/ma19020307

APA Style

Wu, T., Wang, Y., Qi, W., Luo, X., Luo, P., Gao, X., & Song, Y. (2026). Predictive Constitutive Modelling of Oxidation-Induced Degradation in 2.5D Woven C/SiC Composites. Materials, 19(2), 307. https://doi.org/10.3390/ma19020307

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