TY - GEN
T1 - Failure Mechanism and Life Model of C/SiC Under Thermal Mechanical Oxygen Coupling Environment
AU - Zhang, Yinxuan
AU - Gao, Xiguang
AU - Zhang, Sheng
AU - Shang, Deguang
AU - Bao, Rui
AU - Xiong, Sijun
N1 - Publisher Copyright:
© Chinese Society of Aeronautics and Astronautics 2026.
PY - 2026
Y1 - 2026
N2 - Needled C/SiC composites are lightweight and high-temperature resistant material, making them suitable for extreme environments such as aerospace applications. This paper conducted fatigue experiments and finite element analysis (FEA) on 2D needled C/SiC under high-temperature oxidative environments with varying cyclic stresses to predict fatigue life accurately. The thermo mechanical fatigue tests of two random loads and three cyclic loads were carried out, and the related finite element analysis work was carried out to explore the damage mechanism of 2D needled C/SiC. The results indicate that increasing mechanical loads at elevated temperatures drastically reduces the material’s fatigue strength. Fiber ablation dominates performance degradation, as microscopic cracks act as oxygen diffusion channels. Even under minimal stress, fatigue strength plummets once cracks form. Uncoated C/SiC specimens failed to withstand 100 long-cycle thermomechanical fatigue load blocks.
AB - Needled C/SiC composites are lightweight and high-temperature resistant material, making them suitable for extreme environments such as aerospace applications. This paper conducted fatigue experiments and finite element analysis (FEA) on 2D needled C/SiC under high-temperature oxidative environments with varying cyclic stresses to predict fatigue life accurately. The thermo mechanical fatigue tests of two random loads and three cyclic loads were carried out, and the related finite element analysis work was carried out to explore the damage mechanism of 2D needled C/SiC. The results indicate that increasing mechanical loads at elevated temperatures drastically reduces the material’s fatigue strength. Fiber ablation dominates performance degradation, as microscopic cracks act as oxygen diffusion channels. Even under minimal stress, fatigue strength plummets once cracks form. Uncoated C/SiC specimens failed to withstand 100 long-cycle thermomechanical fatigue load blocks.
KW - Ceramic matrix composite
KW - Fatigue life prediction
KW - Needled C/SiC
UR - https://www.scopus.com/pages/publications/105039182805
U2 - 10.1007/978-981-95-3019-9_26
DO - 10.1007/978-981-95-3019-9_26
M3 - 会议稿件
AN - SCOPUS:105039182805
SN - 9789819530182
T3 - Lecture Notes in Mechanical Engineering
SP - 317
EP - 329
BT - Proceedings of the 8th China Aeronautical Science and Technology Conference - Volume 6
PB - Springer Science and Business Media Deutschland GmbH
T2 - 8th China Aeronautical Science and Technology Conference, CASTC 2025
Y2 - 24 October 2025 through 26 October 2025
ER -