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	Dielectric response of spherically anisotropic graded piezoelectric composites
	Wei, En-Bo; Gu, G. Q.; Poon, Y. M.; Shin, F. G.
刊名	JOURNAL OF APPLIED PHYSICS
	2007-10-01
卷号	102期号:7页码:74102
关键词	Nonlinear Composites Effective Conductivity Explicit Formulas Bodies 0-3-composites Coefficients Inclusions Particles Sphere
ISSN号	0021-8979
DOI	10.1063/1.2785020
文献子类	Article
英文摘要	A graded piezoelectric composite consisting of a spherically anisotropic graded piezoelectric inclusion imbedded in an infinite nonpiezoelectric matrix, with the physical properties of the graded spherical inclusion having a power-law profile with respect to the radial variable r, is studied theoretically. Under an external uniform electric field, the electric displacement field and the elastic stress tensor field of this spherically anisotropic graded piezoelectric composite are derived exactly by means of displacement separation technique, based on the governing equations in the dilute limit. A piezoelectric response mechanism, in which the effective piezoelectric response vanishes along the z direction (or x,y directions), is revealed in this kind of graded piezoelectric composites. Furthermore, it is found that the effective dielectric constant decreases (or increases) with the volume fraction p of the inclusions if the exponent parameter k of the grading profile is larger (or smaller) than a critical value. (C) 2007 American Institute of Physics.; A graded piezoelectric composite consisting of a spherically anisotropic graded piezoelectric inclusion imbedded in an infinite nonpiezoelectric matrix, with the physical properties of the graded spherical inclusion having a power-law profile with respect to the radial variable r, is studied theoretically. Under an external uniform electric field, the electric displacement field and the elastic stress tensor field of this spherically anisotropic graded piezoelectric composite are derived exactly by means of displacement separation technique, based on the governing equations in the dilute limit. A piezoelectric response mechanism, in which the effective piezoelectric response vanishes along the z direction (or x,y directions), is revealed in this kind of graded piezoelectric composites. Furthermore, it is found that the effective dielectric constant decreases (or increases) with the volume fraction p of the inclusions if the exponent parameter k of the grading profile is larger (or smaller) than a critical value. (C) 2007 American Institute of Physics.
URL标识	查看原文
语种	英语
WOS记录号	WOS:000250147700092
公开日期	2010-12-30
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/6241]
专题	海洋研究所_海洋环流与波动重点实验室
作者单位	1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 2.E China Normal Univ, Sch Informat Sci & Technol, Shanghai 200062, Peoples R China 3.Hong Kong Polytech Univ, Dept Appl Phys, Hong Kong, Hong Kong, Peoples R China 4.Hong Kong Polytech Univ, Mat Res Ctr, Hong Kong, Hong Kong, Peoples R China
推荐引用方式 GB/T 7714	Wei, En-Bo,Gu, G. Q.,Poon, Y. M.,et al. Dielectric response of spherically anisotropic graded piezoelectric composites[J]. JOURNAL OF APPLIED PHYSICS,2007,102(7):74102.
APA	Wei, En-Bo,Gu, G. Q.,Poon, Y. M.,&Shin, F. G..(2007).Dielectric response of spherically anisotropic graded piezoelectric composites.JOURNAL OF APPLIED PHYSICS,102(7),74102.
MLA	Wei, En-Bo,et al."Dielectric response of spherically anisotropic graded piezoelectric composites".JOURNAL OF APPLIED PHYSICS 102.7(2007):74102.

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