کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1448848 988685 2008 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electromechanical response of piezoelectric composites: Effects of geometric connectivity and grain size
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Electromechanical response of piezoelectric composites: Effects of geometric connectivity and grain size
چکیده انگلیسی

A three-dimensional finite element model has been developed to fully capture the complete electromechanical response of five types of piezoelectric composites (i.e. particulate, short-fiber, long-fiber, laminate and networked composites), the constituent phases of which can, in general, be elastically anisotropic and piezoelectrically active. It is demonstrated that the geometric connectivity of the constituent phases in a composite has a significant influence on the fundamental electromechanical properties and the performance characteristics of a piezoelectric composite. By constructing piezoelectric composite materials design maps, the long-fiber composites (with their highest piezoelectric coupling constants) and interpenetrating networked composites (with their highest piezoelectric charge coefficients) are, respectively, identified as being most suitable for ultrasonic imaging and hydrophone applications. Furthermore, grain size modifications of the constituent phases can significantly enhance the effective piezoelectric properties of a composite such as coupling constants and charge coefficients while maintaining suitable acoustic impedance, especially in the case of the networked composites.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 56, Issue 15, September 2008, Pages 3810–3823
نویسندگان
, ,