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A switch in the domain polarization direction near the tip of a flaw plays an important role in the fracture and fatigue of ferroelectrics under electric and mechanical loading. The present paper adopts a small‐scale switching model with the domain switch based on the combined electric and mechanical work increment. The model is capable of explaining electric fracture, fracture toughness anisotropy and electric fatigue.
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Yang et al. (1998) studied this question.
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