Dynamic fracture behavior of piezoelectric ceramics under impact: Force-electric response and electrical breakdown |
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| Affiliation: | 1. School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China;2. Key Laboratory of Transient Physical Mechanics and Energy Conversion Materials of Liaoning Province, Shenyang Ligong University, Shenyang, 110159, China;1. Department of Conservation Science, the Palace Museum, Beijing, 100009, People’s Republic of China;2. Zhejiang Provincial Institute of Cultural Relics and Archaeology, Hangzhou, Zhejiang, 310013, People’s Republic of China;3. Object Department, the Palace Museum, Beijing, 100009, People’s Republic of China;1. University of Belgrade, Institute of Chemistry, Technology and Metallurgy, 12 Njego?eva St., 11000, Belgrade, Serbia;2. University of Belgrade, Vin?a Institute of Nuclear Science, 12-14 Mike Petrovi?a Alasa St., 11351, Vin?a, Belgrade, Serbia;3. University of Belgrade, Faculty of Technology and Metallurgy, 4 Karnegijeva St., 11000, Belgrade, Serbia;1. Department of Mechanical Science, Division of Science and Technology, Graduate School of Sciences and Technology for Innovation, Tokushima University, 2-1 Minamijyousanjima, Tokushima 770-8506, Japan;2. Graduate School of Advanced Technology and Sciences, Tokushima University, 2-1 Minamijyousanjima, Tokushima 770-8506, Japan;3. Department of Mechanical Science, Graduate School of Technology, Industrial and Social Sciences, Tokushima University, 2-1 Minamijyousanjima, Tokushima 770-8506, Japan;1. School of Materials Science and Engineering, Changwon National University, Changwon, Gyeongnam, 51140, Republic of Korea;2. Department of Energy Engineering, Hanyang University, Seoul, 04763, Republic of Korea;3. Department of Materials Convergence and System Engineering, Changwon National University, Changwon, Gyeongnam, 51140, Republic of Korea;4. School of Materials and Metallurgy Engineering, University of Science and Technology Liaoning, Anshan, Liaoning, 114051, China;5. Steelmaking Research Group, Technical Research Laboratories, POSCO 1, Goedong-dong, Nam-gu, Pohang-shi, Gyeongbuk, Republic of Korea |
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| Abstract: | The brittle fracture may occur in the application of piezoelectric ceramics, but the traditional research is still limited to the static fracture of the materials. Based on the improved Hopkinson pressure bar loading system and high-speed photography technology, the experimental study on the fracture behavior of piezoelectric ceramics under impact loading was carried out. The dynamic mechanical and electrical response of lead zirconate titanate (PZT) and the possible electric breakdown phenomenon were analyzed. The experimental results show that the output voltage is stable and the maximum output voltage is 889 V when the impact load does not cause the material to fracture. When the material breaks, its macroscopic output voltage fluctuates due to electric breakdown. Combined with the finite element simulation of the impact fracture process, the distribution characteristics of the stress field and electric field near the crack during the fracture process were analyzed. The results show that the sliding between grains formed the crack cavity parallel to the electric field during the impact process. Furthermore, based on the theory of dielectric breakdown, the possibility of electric breakdown in the initial defect and the elliptical cavity formed by the impact is analyzed. |
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| Keywords: | Impact Dynamic fracture PZT-5H Electrical breakdown Finite element simulation |
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