Hysteresis loops of carbon fiber-reinforced ceramic-matrix composites with different fiber preforms |
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| Affiliation: | 1. Guangdong Key Laboratory for Advanced Metallic Materials Processing, South China University of Technology, Guangzhou, Guangdong 510640, China;2. City College of Huizhou, Huizhou 516000, China;3. National Engineering Research Center of Near-net-shape Forming for Metallic Materials, South China University of Technology, Guangzhou 510640, China;1. College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, Hunan 410073, PR China;2. Taiyuan Satellite Launch Center, Kelan, Shanxi 036304, PR China;1. Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology, Changsha 410073, China;2. Department of Materials, University of Oxford, Oxford OX1 3PH, UK |
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| Abstract: | The hysteresis loops of C/SiC ceramic-matrix composites (CMCs) with different fiber preforms, i.e., unidirectional, cross-ply, 2D and 2.5D woven, 3D braided, and 3D needled at room temperature have been investigated. Based on fiber slipping mechanisms, the hysteresis loops models considering different interface slip cases have been developed. The effects of fiber volume fraction, matrix cracking density, interface shear stress, interface debonded energy, and fibers failure on hysteresis loops, hysteresis dissipated energy, hysteresis width, and hysteresis modulus have been analyzed. An effective coefficient of fiber volume fraction along the loading direction (ECFL) was introduced to describe fiber preforms. The hysteresis loops, hysteresis dissipated energy and hysteresis modulus of unidirectional, cross-ply, 2D and 2.5D woven, 3D braided and 3D needled C/SiC composites have been predicted. |
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| Keywords: | Ceramic-matrix composites (CMCs) Hysteresis loops Matrix cracking Interface debonding |
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