Ceramic PZT with a controlled crack was subjected to combined four point bending and longitudinal electric field loading to determine the fracture toughness (KIC) as a function of electric field. Application of a positive DC electric field (in the polarization direction) during mechanical loading was observed to reduce the critical stress intensity factor and application of a negative electric field increased the critical stress intensity factor.
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Effects of Electric Field on the Fracture Toughness (KIC) of PZT Ceramics
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Goljahi, S, Pisani, D, Gallagher, J, & Lynch, CS. "Effects of Electric Field on the Fracture Toughness (KIC) of PZT Ceramics." Proceedings of the ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Volume 1. Scottsdale, Arizona, USA. September 18–21, 2011. pp. 341-345. ASME. https://doi.org/10.1115/SMASIS2011-4990
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