Ferroelastic dynamics and strain compatibility
نویسندگان
چکیده
منابع مشابه
Strain intermittency due to avalanches in ferroelastic and porous materials.
The avalanche statistics in porous materials and ferroelastic domain wall systems has been studied for slowly increasing compressive uniaxial stress with stress rates between 0.2 and 17 kPa s-1. Velocity peaks [Formula: see text] are calculated from the measured strain drops and used to determine the corresponding Energy distributions [Formula: see text]. Power law distributions [Formula: see t...
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A phenomenological constitutive law is developed for the deformation of polycrystalline ferroelastic materials. The model is framed within a thermodynamic setting common to internal variable plasticity. The two significant inputs to this model are a switching (yield) surface, and a hardening potential. To maintain simplicity, the shape of the switching surface is assumed to be spherical in a mo...
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In thin film ferroelectric devices, switching of ferroelastic domains can significantly enhance electromechanical response. Previous studies have shown disagreement regarding the mobility or immobility of ferroelastic domain walls, indicating that switching behaviour strongly depends on specific microstructures in ferroelectric systems. Here we study the switching dynamics of individual ferroel...
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The same cannot be said for 3D (spherical) polars. However, they can be derived from the Riemann tensor. Curiously, this method does not require the explicit expressions for the strains in terms of the polar displacements to be known. In 3D there are six independent compatibility equations. It turns out that one of them is identical to Equ.1 (where is now the polar angle to the z-axis, and the ...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2003
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.67.024114