High-Temperature Mechanical Hysteresis in Ceramic-Matrix Composites

✍ Scribed by Longbiao Li

• Publisher: CRC Press
• Year: 2022
• Tongue: English
• Leaves: 236
• Category: Library

✦ Synopsis

This book focuses on mechanical hysteresis behavior in different fiber-reinforced ceramic-matrix composites (CMCs), including 1D minicomposites, 1D unidirectional, 2D cross-ply, 2D plain-woven, 2.5D woven, and 3D needle-punched composites.

Ceramic-matrix composites (CMCs) are considered to be the lightweight high-temperature materials for hot-section components in aeroengines with the most potential. To improve the reliability and safety of CMC components during operation, it is necessary to conduct damage and failure mechanism analysis, and to develop models to predict this damage as well as fracture over lifetime - mechanical hysteresis is a key damage behavior in fiber-reinforced CMCs. The appearance of hysteresis is due to a composite’s internal damage mechanisms and modes, such as, matrix cracking, interface debonding, and fiber failure. Micromechanical damage models and constitutive models are developed to predict mechanical hysteresis in different CMCs. Effects of a composite’s constituent properties, stress level, and the damage states of the mechanical hysteresis behavior of CMCs are also discussed. This book also covers damage mechanisms, damage models and micromechanical constitutive models for the mechanical hysteresis of CMCs.

This book will be a great resource for students, scholars, material scientists and engineering designers who would like to understand and master the mechanical hysteresis behavior of fiber-reinforced CMCs.

✦ Table of Contents

Cover
Half Title
Title Page
Copyright Page
Dedication
Table of Content
Preface
Chapter 1: Introduction
1.1 Application Background of Ceramic-Matrix Composites on Aircraft or Aeroengine
1.2 Manufacturing of CMCs
1.2.1 Fibers
1.2.1.1 Carbon Fiber
1.2.1.2 SiC Fiber
1.2.1.3 Al 2 O 3 Fiber
1.2.2 Fabric Architecture
1.2.3 Interface
1.2.4 Matrix
1.2.4.1 Chemical Vapor Infiltration
1.2.4.2 Polymer Infiltration and Pyrolysis
1.2.4.3 Melt Infiltration (MI)
1.2.4.4 HP
1.3 High-Temperature Mechanical Hysteresis Behavior in Different CMCs
1.3.1 Unidirectional C/SiC
1.3.2 Cross-Ply C/SiC and SiC/MAS-L Composites
1.3.3 2D Plain-Woven SiC/SiC
1.3.4 2.5D C/SiC
1.4 Hysteresis Mechanisms and Models Based on Experimental Observations
1.4.1 Matrix Cracking Opening and Closure
1.4.2 Interface Debonding and Slip
1.4.3 Fiber Failure and Pullout
1.5 Discussion
1.5.1 Effect of Temperature on Mechanical Hysteresis Behavior in CMCs
1.5.2 Effect of Loading Frequency on Mechanical Hysteresis Behavior in CMCs
1.5.3 Effect of Fatigue Stress Ratio on Mechanical Hysteresis Behavior in CMCs
1.6 Summary and Conclusion
References
Chapter 2: Cyclic Mechanical Hysteresis Behavior in One-Dimensional SiC/SiC Minicomposites at Room Temperature
2.1 Introduction
2.2 Micromechanical Hysteresis Constitutive Model
2.3 Experimental Comparisons
2.3.1 Hi-Nicalon™ SiC/SiC Minicomposite
2.3.2 Hi-Nicalon™ Type S SiC/SiC Minicomposite
2.3.3 Tyranno™ ZMI SiC/SiC Minicomposite
2.4 Discussions
2.4.1 Effect of Fiber Volume Fraction on Mechanical Hysteresis Loops
2.4.2 Effect of Interface Shear Stress on Mechanical Hysteresis Loops
2.4.3 Effect of Interface Debonding Energy on Mechanical Hysteresis Loops
2.4.4 Effect of Matrix Cracking on Mechanical Hysteresis Loops
2.4.5 Effect of Fiber Failure on Mechanical Hysteresis Loops
2.5 Summary and Conclusion
References
Chapter 3: High-Temperature Cyclic-Fatigue Mechanical Hysteresis Behavior in Two-Dimensional Plain-Woven Chemical Vapor Infiltration SiC/SiC Composites
3.1 Introduction
3.2 Micromechanical Hysteresis Constitutive Model
3.3 Experimental Comparisons
3.3.1 Cyclic-Fatigue Hysteresis Loops at 1000°C in Air
3.3.2 Cyclic-Fatigue Hysteresis Loops at 1000°C in Steam
3.3.3 Cyclic-Fatigue Hysteresis Loops at 1200°C in Air
3.3.4 Cyclic-Fatigue Hysteresis Loops at 1200°C in Steam
3.3.5 Cyclic-Fatigue Hysteresis Loops at 1300°C in Air
3.4 Discussion
3.5 Summary and Conclusion
References
Chapter 4: High-Temperature Cyclic-Fatigue Mechanical Hysteresis Behavior in 2.5-Dimensional Woven SiC/SiC Composites
4.1 Introduction
4.2 Materials and Experimental Procedures
4.3 Micromechanical Hysteresis Constitutive Model
4.4 Experimental Comparisons
4.4.1 2.5D Woven Hi-Nicalon™ SiC/[Si-B-C] at 600°C in an Air Atmosphere
4.4.2 2.5D Woven Hi-Nicalon™ SiC/[Si-B-C] at 1200°C in an Air Atmosphere
4.5 Summary and Conclusion
References
Chapter 5: High-Temperature Static-Fatigue Mechanical Hysteresis Behavior in Two-Dimensional Plain-Woven Chemical Vapor Infiltration C/[Si-B-C] Composites
5.1 Introduction
5.2 Micromechanical Hysteresis Constitutive Model
5.3 Experimental Comparisons
5.4 Discussion
5.4.1 Effect of Stress Level on Static Fatigue Hysteresis Behavior
5.4.2 Effect of Matrix Crack Spacing on Static-Fatigue Hysteresis Behavior
5.4.3 Effect of Fiber’s Volume Fraction on Static-Fatigue Hysteresis Behavior
5.4.4 Effect of Temperature on Static-Fatigue Hysteresis Behavior
5.5 Summary and Conclusion
References
Chapter 6: High-Temperature Dwell-Fatigue Mechanical Hysteresis Behavior in Cross-Ply SiC/MAS Composites
6.1 Introduction
6.2 Micromechanical Hysteresis Constitutive Model
6.3 Micromechanical Lifetime Prediction Model
6.4 Experimental Comparisons
6.4.1 Cross-Ply SiC/MAS at 566°C in an Air Condition
6.4.2 Cross-Ply SiC/MAS at 1093°C in an Air Condition
6.5 Summary and Conclusion
References
Chapter 7: Mechanical Hysteresis Behavior in a Three-Dimensional Needle-Punched C/SiC Composite at Room Temperature
7.1 Introduction
7.2 Materials and Experimental Procedures
7.3 Micromechanical Hysteresis Constitutive Model
7.3.1 Interface Partial Debonding
7.3.2 Interface Complete Debonding
7.4 Experimental Comparisons
7.4.1 Type 1 3D Needle-Punched C/SiC Composite
7.4.2 Type 2 3D Needle-Punched C/SiC Composite
7.4.3 Type 3 3D Needle-Punched C/SiC Composite
7.4.4 Type 4 3D Needle-Punched C/SiC Composite
7.5 Summary and Conclusion
References
Chapter 8: Mechanical Hysteresis Behavior in CMCs under Multiple-Stage Loading
8.1 Introduction
8.2 Micromechanical Hysteresis Constitutive Model
8.2.1 Case 1
8.2.2 Case 2
8.2.3 Case 3
8.2.4 Case 4
8.2.5 Hysteresis Constitutive Relationship
8.3 Experimental Comparisons
8.3.1 C/SiC Composite
8.3.2 SiC/SiC Composite
8.4 Discussion
8.4.1 Effect of Fiber Volume Content
8.4.2 Effect of Matrix Crack Spacing
8.4.3 Effect of Low Peak Stress Level
8.4.4 Effect of High Peak Stress Level
8.4.5 Effect of Fatigue Stress Range
8.5 Summary and Conclusion
References
Index