scholarly journals Fatigue Life Prediction of Fiber-Reinforced Ceramic-Matrix Composites with Different Fiber Preforms at Room and Elevated Temperatures

Materials ◽  
2016 ◽  
Vol 9 (3) ◽  
pp. 207 ◽  
Author(s):  
Longbiao Li
Keyword(s):  
Fatigue Life ◽  
Life Prediction ◽  
Elevated Temperatures ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Fatigue Life Prediction ◽  
Matrix Composites ◽  
Fiber Reinforced ◽  
Fiber Preforms

scholarly journals The Effect of Random Load on Life Prediction of High-Temperature Ceramic Matrix Composites

2020 ◽  
Author(s):  
En-Zhong Zhang
Keyword(s):  
High Temperature ◽  
Fatigue Life ◽  
Life Prediction ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Matrix Composites ◽  
Fiber Reinforced ◽  
Random Loading ◽  
Mechanism Model ◽  
Safety And Reliability

High-temperature ceramic matrix composites (CMCs) are widely used in hot section components of aeroengine, and random loads have an important effect on their safety and reliability during aircraft operation. The current fatigue life prediction model of CMC is divided into macrophenomenon model and microdamage mechanism model. In this chapter, the fatigue life of fiber-reinforced ceramic matrix composites is investigated. The fatigue life of the fiber-reinforced ceramic matrix composites is predicted by micromechanical methods. The effect of random loading on fatigue life is analyzed and compared with constant peak stress fatigue life. The influence of composite constitutive properties on fatigue fracture is also discussed.

Micromechanical life prediction method of fiber-reinforced ceramic-matrix composites subjected to stochastic overloading at room temperature

2021 ◽  
pp. 146442072110085
Author(s):  
Longbiao Li
Keyword(s):  
Fatigue Life ◽  
Life Prediction ◽  
Room Temperature ◽  
Degradation Rate ◽  
Prediction Method ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Matrix Composites ◽  
Fiber Reinforced ◽  
Damage Models

In this paper, a micromechanical fatigue life prediction method for fiber-reinforced ceramic-matrix composites subjected to stochastic overloading at room temperature is developed. Fatigue damage mechanisms in the matrix, interfaces, and fibers are characterized using different damage models. Relationships between the fatigue life and related degradation rate, stochastic overloading stress, and breakage of intact fibers are established. Experimental fatigue life of different C/SiC composites subjected to different stochastic overloading is predicted. For the same stochastic overloading condition, the degradation rate of fatigue life is the highest for cross-ply C/SiC composite, and the lowest for 2.5D C/SiC composite.

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