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Published July 21, 2004 | Published
Book Section - Chapter Open

A cohesive model of fatigue of ferroelectric materials under electro-mechanical cyclic loading


A cohesive fatigue-crack nucleation and growth model for ferroelectric materials under electro-mechanical loading is presented. The central feature of the model is a hysteretic cohesive law which couples the mechanical and electrical fields. This law can be used in conjunction with general constitutive relations of bulk behavior, possibly including domain switching, in order to predict fatigue crack growth under arbitrary loading conditions. Another appealing feature of the model is its ability to predict fatigue-crack nucleation. Despite the scarcity and uncertainty of the experimental data, comparisons with PZT fatigue-life data are encouraging.

Additional Information

© 2004 Society of Photo-Optical Instrumentation Engineers (SPIE). We are grateful for support provided by the Army Research Office through Caltech's MURI on Engineering Microstructural Complexity in Ferroelectric Devices.

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August 19, 2023
August 19, 2023