1. Fatigue life prediction considering individual modulus for unidirectional needled C/SiC composites under variable amplitude loading.
- Author
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Yin, Xiang, Shang, De-Guang, Zuo, Lin-Xuan, Qu, Lin-Feng, Zhang, Hang, Zhou, Shuai, and Li, Dao-Hang
- Subjects
- *
FATIGUE limit , *FATIGUE cracks , *DAMAGE models , *FORECASTING , *FATIGUE life - Abstract
• Positive correlation between individual modulus and fatigue strength was identified. • Fatigue life model considering individual modulus was proposed. • Fatigue life prediction method under variable amplitude loading was proposed. Needled C/SiC composites are widely used in the aerospace field, making the evaluation of fatigue damage critically important. A fatigue damage model associated with the individual modulus is proposed. Compared to the fatigue damage model by S-N curve, the proposed fatigue damage model can better characterize the fatigue damage behavior of UN-C/SiC composites. By combining the rainflow counting method, the Goodman equation, and the Palmgren-Miner damage accumulation rule, a fatigue life prediction method considering the individual modulus is developed for UN-C/SiC composites under variable amplitude loading. Compared with the experimental life, the predicted fatigue life shows a good result. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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