Some recent results on phase-field modeling of the nucleation, growth and interaction of domain needles are presented. First, the nucleation of domains near crack tips is studied within the context of a small-scale switching boundary layer formulation. Combinations of mechanical stress intensity factors and electric displacement intensity factors that cause domain nucleation are reported. After nucleation, domains are allowed to grow. The effects of the new domain structures on the crack growth energy release rate are studied.
Volume Subject Area:
Active Materials, Mechanics and Behavior
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