scholarly journals Modeling Temperature-Dependent Vibration Damping in C/SiC Fiber-Reinforced Ceramic-Matrix Composites

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1633 ◽  
Author(s):  
Longbiao Li
Keyword(s):  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Vibration Damping ◽  
Interface Debonding ◽  
Matrix Composites ◽  
Fiber Reinforced ◽  
Temperature Dependent ◽  
Fiber Volume ◽  
Sic Fiber ◽  
Peak Value

In this paper, the temperature-dependent vibration damping in C/SiC fiber-reinforced ceramic-matrix composites (CMCs) with different fiber preforms under different vibration frequencies is investigated. A micromechanical temperature-dependent vibration damping model is developed to establish the relationship between composite damping, material properties, internal damage mechanisms, and temperature. The effects of fiber volume, matrix crack spacing, and interface properties on temperature-dependent composite vibration damping of CMCs and interface damage are analyzed. The experimental temperature-dependent composite damping of 2D and 3D C/SiC composites is predicted for different loading frequencies. The damping of the C/SiC composite increases with temperature to the peak value and then decreases with temperature. When the vibration frequency increases from f = 1 to 10 Hz, the peak value of composite damping and corresponding temperature both decrease due to the decrease of interface debonding and slip range, and the damping of 2D C/SiC is much higher than that of 3D C/SiC at temperature range from room temperature to 400 °C. When the fiber volume and interface debonding energy increase, the peak value of composite damping and the corresponding temperature decreases, mainly attributed to the decrease of interface debonding and slip range.

A cyclic-dependent vibration damping model of fiber-reinforced ceramic-matrix composites

2020 ◽  
pp. 095440622097166
Author(s):  
Longbiao Li
Keyword(s):  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Vibration Damping ◽  
Interface Debonding ◽  
Matrix Composites ◽  
Fiber Reinforced ◽  
Damage Mechanisms ◽  
Cycle Number ◽  
Vibration Stress ◽  
Damping Model

Under cyclic fatigue loading, cyclic-dependent damage mechanisms affect the vibration damping of fiber-reinforced ceramic-matrix composites (CMCs). In this paper, a cyclic-dependent vibration damping model of fiber-reinforced CMCs is developed. Combining cyclic-dependent damage mechanisms, damage models and dissipated energy model, relationships between composite vibration damping, cyclic-dependent damage mechanisms, vibration stress and applied cycle number are established. Effects of material properties and damage state on composite vibration damping are analyzed for different applied cycle number and vibration stress. Experimental composite vibration damping of 2D and 3D C/SiC composites without/with coating is predicted for different vibration frequencies and applied cycle number. With increasing applied cycle number, cyclic-dependent composite vibration damping increases due to the increase ratio of interface debonding and slip. When fiber volume and matrix cracking spacing increase, cyclic-dependent composite vibration damping decreases due to the decrease ratio of interface debonding and slip.

A micromechanical vibration damping model of fiber-reinforced ceramic–matrix composites considering interface debonding

2020 ◽  
pp. 146442072096971
Author(s):  
Longbiao Li
Keyword(s):  
Shear Stress ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Vibration Damping ◽  
Dissipated Energy ◽  
Interface Debonding ◽  
Matrix Composites ◽  
Fiber Reinforced ◽  
Stress Dependent ◽  
Damping Model

A micromechanical vibration damping model of fiber-reinforced ceramic–matrix composites is developed considering interface debonding. The relationship between the stress-dependent composite damping and interface debonding is established. Effects of material properties and damage-related parameters on the vibration damping of fiber-reinforced CMCs are discussed. Experimental vibration damping with interface debonding of C/SiC composites is predicted. When the vibration frequency increases from f = 1–5 Hz, the vibration damping decreases due to the increasing dynamic interfacial shear stress and low frictional dissipated energy in the debonding region. The composite vibration damping decreases with increasing fiber volume, matrix crack spacing and interface shear stress, and increases with fiber radius and fiber elastic modulus. When the interface debonding energy increases, the vibration damping decreases when the interface partial debonding and approaches the same value when the interface complete debonding, and the vibration stress for complete interface debonding increases.

scholarly journals Temperature-dependent proportional limit stress of SiC/SiC fiber-reinforced ceramic-matrix composites

2020 ◽  
Vol 39 (1) ◽  
pp. 209-218 ◽  
Author(s):  
Longbiao Li
Keyword(s):  
Ceramic Matrix Composites ◽  
Interface Debonding ◽  
Matrix Composites ◽  
Temperature Dependent ◽  
Fiber Volume ◽  
Damage State ◽  
Sic Fiber ◽  
Composite Damage ◽  
Environment Temperature ◽  
Proportional Limit Stress

AbstractIn this paper, the temperature-dependent proportional limit stress (PLS) of SiC/SiC fiber-reinforced ceramic-matrix composites (CMCs) is investigated using the micromechanical approach. The PLS of SiC/SiC is predicted using an energy balance approach considering the effect of environment temperature. The relation between the environment temperature, PLS, and composite damage state is established. The effects of the fiber volume, interface properties, and matrix properties on the temperature-dependent PLS and composite damage state of SiC/SiC composite are analyzed. The experimental PLS and interface debonding length of 2D SiC/SiC composites with the PyC and BN interphase at elevated temperatures are predicted. The temperature-dependent PLS of SiC/SiC composite increases with the fiber volume, interface shear stress and interface debonding energy, and the matrix fracture energy and decreases with the interface frictional coefficient at the same temperature.

The temperature-dependent fracture models for fiber-reinforced ceramic matrix composites

2016 ◽  
Vol 140 ◽  
pp. 534-539 ◽  
Author(s):  
Yong Deng ◽  
Weiguo Li ◽  
Ruzhuan Wang ◽  
Jiaxing Shao ◽  
Peiji Geng ◽  
...  
Keyword(s):  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Matrix Composites ◽  
Fiber Reinforced ◽  
Temperature Dependent ◽  
Fracture Models

scholarly journals Comparisons of thermomechanical fatigue hysteresis loops of fiber-reinforced ceramic-matrix composites subjected to different phase angles

2018 ◽  
Vol 233 (6) ◽  
pp. 2015-2032 ◽  
Author(s):  
Li Longbiao
Keyword(s):  
Volume Fraction ◽  
Frictional Coefficient ◽  
Hysteresis Loops ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Thermomechanical Fatigue ◽  
Matrix Composites ◽  
Fiber Reinforced ◽  
Fiber Volume ◽  
Phase Angles

In this paper, comparisons of thermomechanical fatigue hysteresis loops of fiber-reinforced ceramic-matrix composites (CMCs) subjected to different phase angles of θ = 0, π/3, π/2, and π have been investigated. The shape, location, and area of fatigue hysteresis loops are affected by the phase angle under the thermomechanical cyclic loading. The effects of fiber volume fraction, fatigue peak stress, matrix crack spacing, interface frictional coefficient, and interface debonded energy on the thermomechanical fatigue hysteresis loops and fiber/matrix interface slip of different phase angles are discussed. The fatigue hysteresis loops of cross-ply CMCs under the phase angles of θ = 0 and π are predicted for different fatigue peak stresses and cycle numbers.

Finite Element Analysis of Interfacial Debonding Damage in Fiber-Reinforced Ceramic Matrix Composites

2007 ◽  
Vol 546-549 ◽  
pp. 1555-1558
Author(s):  
Chun Jun Liu ◽  
Yue Zhang ◽  
Da Hai Zhang ◽  
Zhong Ping Li
Keyword(s):  
Finite Element ◽  
Fiber Volume Fraction ◽  
Volume Fraction ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Interfacial Debonding ◽  
Matrix Composites ◽  
Fiber Reinforced ◽  
Fiber Volume ◽  
Element Analysis

In this paper the composite fracture process has been simulated via the finite element method. A micromechanics model was developed to predict the stress-strain response of a SiO2f/ SiO2 composite explicitly accounting for the local damage mechanisms such as fiber fracture and interfacial debonding. The effects of interfacial strength and fiber volume fraction on the toughness of fiber-reinforced ceramic matrix composites were investigated. The results showed that the composite failure behaviors correlated with the interface strength, which could achieve an optimum value for the elevation of the composite toughness. The increase of fiber volume fraction can make more toughening contributions.

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