کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
278377 1430299 2011 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A constitutive model for thermo-electro-mechanical behavior of ferroelectric polycrystals near room temperature
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
A constitutive model for thermo-electro-mechanical behavior of ferroelectric polycrystals near room temperature
چکیده انگلیسی

A constitutive model that can be used to predict thermo-electro-mechanical linear and nonlinear behavior of ferroelectric polycrystals near room temperature is proposed. A ferroelectric polycrystal is modeled by an agglomerate of 210 single crystallites that are distributed regularly over all directions. A variant in a single crystallite is characterized by a Gibbs free energy function whose coefficients have linear dependency on temperature. A dissipation inequality for domain switching is derived from the restriction of the second law of thermodynamics. Domain switching process is governed by a viscoplastic switching law with temperature-dependent switching parameters. The responses of the proposed model to electric field and mechanical stress loading at room and elevated temperatures are calculated and compared qualitatively with experimental observations available in literature.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Solids and Structures - Volume 48, Issue 9, 1 May 2011, Pages 1318–1329
نویسندگان
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