Abstract
Piezoelectric material has widely used in various applications with its high liable performance and quite smart electro-mechanical characteristics. However, solutions for number of troubles in strength and behavior of fracture have not sufficiently clarified yet. Among these associated solutions, the double torsion (DT) technique is the particular and effective method to measure toughness of fracture and growth behavior of slow crack in ceramic material. From the results of this work, it obtained the practical feasibility of the DT technique for finding growth behavior of crack initiated by kinds of cyclic electric fatigue on piezoelectric ceramics, and found that the initiated crack is able to propagate by using a relatively lower cyclical voltage than before cases under a constant mechanical load if the DT technique is used. In this study, it is also established the experimental method of the crack propagation by cyclic electric fatigue for the piezoelectric ceramics using DT technique, and found the possibility of the power law based on the classical Paris’ equation for analyzing the result of electric fatigue crack test.
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This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (grant no. 2018R1D1A1B07046366).
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Dong-Chul Shin received the B.S., M.S., and Ph.D. degrees in Mechanical Engineering from Yeungnam University in 1995, 1997, and 2001, respectively. He studied at the University of Tokyo, Japan as a Post-Doctoral Fellow from 2005 to 2007. He is currently a Professor in the Department of Mechanical Engineering at Koje College, Korea. His research interests include static and dynamic fracture mechanics, stress analysis, and fracture criteria of piezoelectric ceramics.
Tae-Gyu Kim is working as Professor at the Department of Nanomechatronics Engineering, Pusan National University. His research interests focus primarily on nanotechnology for synthesis and characterization of CVD boron doped diamond (BDD), Diamond-like carbon (DLC) films, electro-spinning nanofabrication and smart window research have been major research areas for about 20 years. The development of optimal BDD electrodes has led to his current research interest in the application of wastewater treatment and extreme environmental devices.
Dae-Weon Kim received the B.S. degree in Mechanical Engineering from Pusan National University and M.S and Ph.D. degrees in Aerospace Engineering from Seoul National University in 1990, 2002, and 2008, respectively. He studied at Institute of Advanced Aerospace Tech-nology in the Seoul National University as a Senior Researcher for five years. He was a Professor in the Department of Aviation Maintenance at Taegu Technical University, and currently a Professor in the Division of Intelligent Automobile Engineering at Silla University, Korea. His research interests are an applicable and feasible technology used in space program for the energy harvesting from particular dynamic behavior of piezoelectric ceramics.
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Shin, DC., Kim, TG. & Kim, DW. Influence of cyclical electric load on crack growth in piezoelectric ceramics under a constant mechanical load. J Mech Sci Technol 34, 1623–1628 (2020). https://doi.org/10.1007/s12206-020-0324-z
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DOI: https://doi.org/10.1007/s12206-020-0324-z