Electric-Field-Induced Fatigue Crack Growth in Piezoelectrics |
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| Authors: | Hengchu Cao Anthony G Evans |
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| Affiliation: | Materials Department, College of Engineering, University of California, Santa Barbara, California 93106–5050 |
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| Abstract: | When subjected to large alternating electric fields, ferroelectric ceramics may experience cracking and mechanical degradation. This article describes an experimental procedure for characterizing crack extension from preexisting flaws in such materials subject to high-amplitude, alternating electric fields. A new mode of electric-field-induced fatigue crack growth is identified. Fracture mechanics concepts are applied to interpret the observed cracking. |
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