کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1450399 988732 2006 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electromechanical response of porous piezoelectric materials
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Electromechanical response of porous piezoelectric materials
چکیده انگلیسی

A finite element model is developed to study the effects of porosity on the electromechanical response of piezoelectric materials. Upon classifying 3-1-type porous materials as “longitudinally” or “transversely” porous, depending on the relative orientation of the porosity axis with respect to the poling direction of the piezoelectric material, the effects of porosity on the coupled properties of piezoelectric materials are systematically characterized. It is demonstrated that: (i) “longitudinally” porous materials with circular porosity cross-section exhibit higher order symmetry while “transversely” porous materials with elliptical porosity cross-section display lower order symmetry; (ii) the principal elastic, dielectric, and piezoelectric properties decrease monotonically with an increase in the porosity volume fraction (with higher sensitivity to porosity geometry in “transversely” porous materials); (iii) increasing the porosity in a piezoelectric material (especially in the “transverse” sense) enhances the utility of the materials for select applications by decreasing the acoustic impedance and increasing the hydrostatic charge coefficient.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 54, Issue 15, September 2006, Pages 4063–4078
نویسندگان
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