Thermal shock resistance behavior of auxetic ceramic honeycombs with a central crack or an edge crack |
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| Affiliation: | 1. School of Mechanical and Chemical Engineering, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia;2. School of Civil, Environmental and Mining Engineering, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia;1. School of Architectural Engineering, Jinling Institute of Technology, Nanjing 211169, China;2. School of Science, Harbin Institute of Technology, Shenzhen 518055, China;3. Centre for Infrastructure Engineering, School of Computation, Engineering and Mathematics, Western Sydney University, Australia;4. Guangdong Mao-Bridge Design & Research Institute Co., Ltd., Shenzhen 518110, China;1. School of Science, Harbin Institute of Technology, Shenzhen 518055, China;2. Centre for Infrastructure Engineering, School of Computing, Engineering and Mathematics, Western Sydney University, Penrith, NSW, 2751, Australia;1. Department of Mechanical Engineering, University of Massachusetts Dartmouth, North Dartmouth, MA 02747, United States;2. Department of Bioengineering, University of Massachusetts Dartmouth, North Dartmouth, MA 02747, United States;1. College of Aeronautical Engineering, Civil Aviation University of China, Tianjin 300222, People’s Republic of China;2. Tianjin Key Laboratory of High Speed Cutting and Precision Machining, Tianjin University of Technology and Education, Tianjin 300222, People’s Republic of China;3. Centre for Infrastructure Engineering, School of Computing, Engineering and Mathematics, Western Sydney University, Penrith NSW 2751, Australia |
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| Abstract: | In this paper, the thermal shock resistance of an auxetic ceramic honeycomb plate is studied based on the fracture mechanics concept for the cases of a central crack or an edge crack. The transient temperature field and transient thermal stress field are obtained for both auxetic and non-auxetic structures. The relationship between the thermal stress intensity factor (TSIF) and the internal cell angle, crack length and time is determined and the critical temperature for the initiation of crack propagation is predicted. Results show that compared with the non-auxetic ceramic honeycombs which are at an internal cell angle of 30°, the critical temperature of the auxetic ceramic honeycombs whose cell are orientated at an angle of ?30° increases by 78.5% and the TSIF at the crack tip decreases by 40%, respectively. Hence, the auxetic structures have better thermal shock resistance. This study indicates that auxetic ceramic honeycombs have significant potential applications in harsh temperature environments. |
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| Keywords: | Auxetic material Honeycomb Thermal shock resistance Critical temperature |
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