Time-Dependent Mechanical Behavior of Ceramic-Matrix Composites at Elevated Temperatures (Advanced Ceramics and Composites, 1)

✍ Scribed by Longbiao Li

• Publisher: Springer
• Tongue: English
• Leaves: 373
• Category: Library

✦ Synopsis

This book investigates the time-dependent behavior of fiber-reinforced ceramic-matrix composites (CMCs) at elevated temperatures. The author combines the time-dependent damage mechanisms of interface and fiber oxidation and fracture with the micromechanical approach to establish the relationships between the first matrix cracking stress, matrix multiple cracking evolution, tensile strength, tensile stress-strain curves and tensile fatigue of fiber-reinforced CMCs and time. Then, using damage models of energy balance, the fracture mechanics approach, critical matrix strain energy criterion, Global Load Sharing criterion, and hysteresis loops he determines the first matrix cracking stress, interface debonded length, matrix cracking density, fibers failure probability, tensile strength, tensile stress-strain curves and fatigue hysteresis loops. Lastly, he predicts the time-dependent mechanical behavior of different fiber-reinforced CMCs, i.e., C/SiC and SiC/SiC, using the developed approaches, in order to reduce the failure risk during the operation of aero engines. The book is intended for undergraduate and graduate students who are interested in the mechanical behavior of CMCs, researchers investigating the damage evolution of CMCs at elevated temperatures, and designers responsible for hot-section CMC components in aero engines. 

✦ Table of Contents

Preface
Acknowledgements
Contents
1 Time-Dependent First Matrix Cracking Stress of Ceramic-Matrix Composites at Elevated Temperatures
1.1 Introduction
1.2 First Matrix Cracking Stress of Fiber-Reinforced Ceramic-Matrix Composites Considering Fiber Fracture
1.2.1 Stress Analysis
1.2.2 Interface Debonding
1.2.3 First Matrix Cracking Stress
1.2.4 Results and Discussion
1.2.5 Experimental Comparisons
1.3 Time-Dependent First Matrix Cracking Stress of Fiber-Reinforced Ceramic-Matrix Composites Considering Interface Oxidation
1.3.1 Time-Dependent Stress Analysis
1.3.2 Time-Dependent Interface Debonding
1.3.3 Time-Dependent First Matrix Cracking Stress
1.3.4 Results and Discussion
1.3.5 Experimental Comparisons
1.4 Time-Dependent First Matrix Cracking Stress of Fiber-Reinforced Ceramic-Matrix Composites Considering Interface and Fiber Oxidation
1.4.1 Time-Dependent Stress Analysis
1.4.2 Downstream Stresses
1.4.3 Upstream Stresses
1.4.4 Time-Dependent Interface Debonding
1.4.5 Time-Dependent First Matrix Cracking Stress
1.4.6 Results and Discussion
1.4.7 Experimental Comparisons
1.5 Conclusion
References
2 Time-, Stress-, and Cycle-Dependent Matrix Multicracking of Fiber-Reinforced Ceramic-Matrix Composites at Elevated Temperatures
2.1 Introduction
2.2 Stress-Dependent Matrix Multicracking Evolution of Fiber-Reinforced Ceramic-Matrix Composites Considering Fiber Debonding
2.2.1 Stress Analysis
2.2.2 Interface Debonding
2.2.3 Matrix Multicracking
2.2.4 Results and Discussion
2.2.5 Experimental Comparisons
2.3 Time-Dependent Matrix Multicracking Evolution of Fiber-Reinforced Ceramic-Matrix Composites Consider Interface Oxidation
2.3.1 Time-Dependent Stress Analysis
2.3.2 Time-Dependent Interface Debonding
2.3.3 Time-Dependent Matrix Multicracking
2.3.4 Results and Discussion
2.3.5 Experimental Comparisons
2.4 Time-Dependent Matrix Multicracking Evolution of Fiber-Reinforced Ceramic-Matrix Composites Considering Interface and Fiber Oxidation
2.4.1 Time-Dependent Stress Analysis
2.4.2 Interface Debonding
2.4.3 Matrix Multicracking
2.4.4 Results and Discussion
2.4.5 Experimental Comparisons
2.5 Cyclic-Dependent Matrix Multicracking Evolution of Fiber-Reinforced Ceramic-Matrix Composites Considering Interface Wear and Fiber Fracture
2.5.1 Cyclic-Dependent Stress Analysis
2.5.2 Cyclic Dependent Interface Debonding
2.5.3 Cyclic-Dependent Interface Wear
2.5.4 Cyclic-Dependent Fiber Failure
2.5.5 Cyclic-Dependent Matrix Multicracking
2.5.6 Results and Discussion
2.5.7 Experimental Comparisons
2.6 Conclusion
References
3 Time-, Stress-, and Cycle-Dependent Tensile Strength of Fiber-Reinforced Ceramic-Matrix Composites
3.1 Introduction
3.2 Cyclic-Dependent Tensile Strength of Fiber-Reinforced CMCs Under Multiple Fatigue Loading at Room Temperature
3.2.1 Cyclic-Dependent Stress Analysis
3.2.2 Matrix Multicracking
3.2.3 Interface Debonding
3.2.4 Interface Wear
3.2.5 Cyclic-Dependent Fiber Failure
3.2.6 Results and Discussion
3.2.7 Experimental Comparisons
3.3 Time-Dependent Tensile Residual Strength of Fiber-Reinforced CMCs Considering Interface Oxidation at Elevated Temperature
3.3.1 Time-Dependent Residual Strength Model
3.3.2 Results and Discussion
3.3.3 Experimental Comparisons
3.4 Time-Dependent Tensile Residual Strength of Fiber-Reinforced CMCs Under Cyclic Loading at Elevated Temperature
3.4.1 Cyclic-Dependent Residual Strength Model
3.4.2 Results and Discussion
3.4.3 Experimental Comparisons
3.5 Conclusion
References
4 Time-Dependent Tensile Behavior of Fiber-Reinforced Ceramic-Matrix Composites
4.1 Introduction
4.2 Time-Dependent Tensile Damage and Fracture of Fiber-Reinforced Ceramic-Matrix Composites Subjected to Pre-exposure at Elevated Temperature
4.2.1 Stress Analysis Considering Interface Oxidation and Fiber Failure
4.2.2 Matrix Multicracking Considering Interface Oxidation
4.2.3 Interface Debonding Considering Interface Oxidation
4.2.4 Fiber Failure Considering Interface and Fiber Oxidation
4.2.5 Tensile Stress-Strain Curves Considering Effect of Pre-exposure
4.2.6 Results and Discussion
4.2.7 Experimental Comparisons
4.3 Cyclic-Dependent Tensile Damage and Fracture of Fiber-Reinforced Ceramic-Matrix Composites Subjected to Thermal Fatigue Loading
4.3.1 Cyclic-Dependent Stress Analysis
4.3.2 Cyclic-Dependent Interface Debonding
4.3.3 Cyclic-Dependent Fiber Failure
4.3.4 Cyclic-Dependent Tensile Constitutive Relationship
4.3.5 Results and Discussion
4.3.6 Experimental Comparisons
4.4 Conclusion
References
5 Time-Dependent Fatigue Behavior of Fiber-Reinforced Ceramic-Matrix Composites at Elevated Temperatures
5.1 Introduction
5.2 Time-Dependent Static Fatigue Damage Evolution at Elevated Temperature
5.2.1 Time-Dependent Static Fatigue Hysteresis Theories
5.2.2 Results and Discussion
5.2.3 Experimental Comparisons
5.3 Time-Dependent Strain Response Under Stress-Rupture and Cyclic Loading at Elevated Temperature
5.3.1 Time-Dependent Strain Response Analysis
5.3.2 Results and Discussion
5.3.3 Experimental Comparisons
5.4 Conclusion
References