Fatigue behavior and damage analysis of PIP C/SiC composite |
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| Affiliation: | 1. Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology, Changsha 410083, China;2. Advanced Ceramics, University of Bremen, Bremen 28359, Germany;3. Center for Environmental Research and Sustainable Technology (UFT), University of Bremen, Bremen 28359, Germany;4. National Key Laboratory of Science and Technology on High-strength Structural Materials, Central South University, Changsha 410083, China;5. Powder Metallurgy Research Institute, Central South University, Changsha 410083, China;6. MAPEX - Center for Materials and Processes, University of Bremen, Bremen 28359, Germany;1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, China;2. Structural Ceramics and Composites Engineering Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, China;3. University of Chinese Academy of Sciences, Beijing, China;4. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China;1. Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen 361005, China;2. Fujian Key Laboratory of Advanced Materials (Xiamen University), Xiamen 361005, China;3. Key Laboratory of High Performance Ceramics Fibers (Xiamen University), Ministry of Education, Xiamen 361005, China;1. Department of Quantum Science and Energy Engineering, Graduate School of Engineering, Tohoku University, Sendai, 980-8579, Japan;2. Institute for Materials Research, Tohoku University, Sendai, 980-8577, Japan;3. Research Center for Structural Materials, National Institute for Materials Science, Tsukuba, 305-0047, Japan;1. Research Centre for Aeronautical Component Manufacturing Technology & Equipment, Shandong University, Jinan 250061, China;2. Key Laboratory of High-efficiency and Clean Mechanical Manufacture, National Demonstration Center for Experimental Mechanical Engineering Education, School of Mechanical Engineering, Shandong University, Jinan 250061, China;3. School of Materials Science & Engineering, Shandong University, Jinan 250061, China;1. Shaanxi Key Laboratory of Fiber Reinforced Light Composite Materials, State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, PR China;2. Key Laboratory of High Performance Ceramic Fibers (Xiamen University), Ministry of Education, Xiamen, PR China;1. Department of Mechanical Engineering, Tokyo University of Science, 6–3-1, Niijyuku, Katsushika-ku, Tokyo, Japan;2. Department of Materials Science and Technology, Tokyo University of Science, 6–3-1, Niijyuku, Katsu-shika-ku, Tokyo, Japan;3. National Institute for Materials Science (NIMS), 1–2-1, Sengen, Tsukuba, Ibaraki 305–0021, Japan;4. Division of Systems Research, Faculty of Engineering, Yokohama National University, Yokohama 240–8501, Japan |
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| Abstract: | In this work, we study the fatigue behavior of a C/SiC composite produced by several cycles of polymer infiltration and pyrolysis (PIP). Fatigue tests were performed with maximum stresses corresponding to 60–90% of the tensile strength of the composite. During the fatigue tests, acoustic emission (AE) monitoring was performed and the measured AE energy was utilized to quantify the damage and distinguish possible damage mechanisms. Most of the fatigue damage in the form of matrix cracking, interface damage and fiber breakage occurs in the first cycle. As loading cycles proceeded, damage in form of matrix crack re-opening and interfacial friction constantly accumulates. Nevertheless, all samples survived the run-out of 1,000,000 cycles. After the fatigue tests, an increase of the tensile strength is observed. This phenomenon is associated with the relief of process-induced internal thermal stresses and the weakening of the fiber-matrix interface. In general, the studied material shows very high relative fatigue limit of 90% of its tensile strength. |
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| Keywords: | Ceramic matrix composites Fatigue Damage analysis Acoustic emission Residual strength |
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