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Modeling the temperature-dependent fatigue strength for ceramic matrix composites
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高
李
DOI：10.1016/j.ceramint.2026.08.121.png)
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Abstract
En 中文
Ceramic Matrix Composites (CMCs) are inevitably subjected to high-temperature fatigue environments during service. However, characterizing the high-temperature fatigue performance of CMCs is challenging due to the high cost and time-consuming nature of traditional experimental methods. To address this issue, this study proposes a physics-based temperature-dependent theoretical model for fatigue strength, which quantitatively describes the effect of temperature on the fatigue strength of CMCs. The model requires only fundamental parameters that can be obtained through non-destructive means, such as Young's modulus and specific heat capacity, to effectively predict the fatigue strength across a temperature range. Consequently, it provides an efficient alternative to evaluating high-temperature fatigue performance with reduced experimental requirements. The theoretical predictions are in good agreement with multiple sets of experimental data at various temperatures, validating the accuracy and applicability of the proposed model. Additionally, the quantitative effects of Young's moduli of the matrix and fibers on the high-temperature fatigue strength are analyzed. The developed model provides a low-cost theoretical tool for rapid assessment of high-temperature fatigue performance of CMCs, holding significant potential for engineering applications.
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