Abstract
In this paper, the effect of the fiber/matrix interface properties on the tensile and fatigue behavior of 2D woven SiC/SiC ceramic‐matrix composites (CMCs) is investigated. The relationships between the interface parameters of the fiber/matrix interface debonding energy and interface frictional shear stress in the interface debonding region and the composite tensile and fatigue damage parameters of first matrix cracking stress, matrix cracking density, and fatigue hysteresis‐based damage parameters are established. The effects of the fiber/matrix interface properties on the first matrix cracking stress, matrix cracking evolution, first and complete interface debonding stress, fatigue hysteresis dissipated energy, hysteresis modulus, and hysteresis width are analyzed. The experimental first matrix cracking stress, matrix cracking evolution, and fatigue hysteresis loops of SiC/SiC composites are predicted using different interface properties.
Highlights
Ceramic matrix composites (CMCs) are widely used in the high-temperature field as a light and high-performance structural composite material
Vagaggini et al [21] developed an approach to establish the relationship between the interface properties and the hysteresis loops of fiber-reinforced CMCs and divided the interface debonding energy into small and large, which affects the shape of the hysteresis loops upon unloading and reloading
1.0 ζd/ζm and fatigue hysteresis width are analyzed. e experimental tensile and fatigue behavior of SiC/SiC composites is predicted for different interface properties
Summary
Ceramic matrix composites (CMCs) are widely used in the high-temperature field as a light and high-performance structural composite material. E interface properties of the fiber/matrix interface shear stress and the interface debonding energy affect the tensile and fatigue behavior of fiber-reinforced CMCs [15,16,17,18,19,20]. Curtin et al [23] predicted the tensile stress-strain behavior of mini-SiC/SiC composite considering matrix cracking evolution, fiber damage, and Advances in Materials Science and Engineering. It was found that the matrix cracking stress affects the brittle and tough behavior of fiber-reinforced CMCs. Carrere et al [24] investigated the influence of the interphase on the matrix cracking deflection in mini-SiC/C/ SiC composite with a pyrocarbon interphase. Xia and Curtin [25] investigated the high interface shear stress on the tensile strength of fiber-reinforced CMCs considering the stress concentration at the interface debonding tip. Fatigue hysteresis width are analyzed. e experimental tensile and fatigue behavior of SiC/SiC composites is predicted for different interface properties
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