NDLI: The influence of partial discharge on crack propagation in piezoelectric materials

Content Provider	IEEE Xplore Digital Library
Author	Peng-zhou Li Jia-cheng Luo
Copyright Year	2015
Description	Author affiliation: Nucl. Power Inst. of China, Chengdu, China (Peng-zhou Li; Jia-cheng Luo)
Abstract	This paper studies the influence of partial discharge (PD) on crack propagation in piezoelectric materials under combined mechanical and electric loads. According to Stroh formalism, the electric field is obtained based on the semi-permeable electrical boundary condition inside the crack. Then, the crack propagation effects of the electric field without PD are discussed through considering the contribution of the induced electric field inside the deformed crack space to the total energy release rate, and the effect of partial discharge on the crack propagation is also derived under the assumption of the streamer-type mechanism. Finally, the electric field curves and the energy release rate before PD are numerically calculated in the condition of different environments under remote mechanic-electric loads to investigate its effects on crack growth. It is found that the process of partial discharge is very complex and accompanied with randomness in a semi-permeable crack, and the applied mechanical stress, the electric field and dielectric ratio have influence on the crack propagation of piezoelectric materials.
Starting Page	476
Ending Page	479
File Size	703863
Page Count	4
File Format	PDF
ISBN	9781479988075
DOI	10.1109/SPAWDA.2015.7364534
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-10-30
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Partial discharges Piezoelectric material Energy release rate Piezoelectric materials Loading Partial discharge effect Dielectrics Electric fields Surface cracks Stress Crack propagation
Content Type	Text
Resource Type	Article

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