A field model interpretation of crack initiation and growth behavior in ferroelectric ceramics: change of poling direction and boundary condition

doi:10.1016/S0167-8442(02)00077-0

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	A field model interpretation of crack initiation and growth behavior in ferroelectric ceramics: change of poling direction and boundary condition
	Sih GC; Sih, GC (reprint author), Xian Jiaotong Univ, Sch Adv Sci & Technol, POB 1175, Xian 710049, Shaanxi, Peoples R China.
发表期刊	Theoretical and Applied Fracture Mechanics
	2002
卷号	38 期号:1 页码:1-14
ISSN	0167-8442
摘要	Strain energy density expressions are obtained from a field model that can qualitatively exhibit how the electrical and mechanical disturbances would affect the crack growth behavior in ferroelectric ceramics. Simplification is achieved by considering only three material constants to account for elastic, piezoelectric and dielectric effects. Cross interaction of electric field (or displacement) with mechanical stress (or strain) is identified with the piezoelectric effect; it occurs only when the pole is aligned normal to the crack. Switching of the pole axis by 90degrees and 180degrees is examined for possible connection with domain switching. Opposing crack growth behavior can be obtained when the specification of mechanical stress sigma(infinity) and electric field E-infinity or (sigma(infinity), E-infinity) is replaced by strain e and electric displacement D-infinity or (epsilon(infinity), D-infinity). Mixed conditions (sigma(infinity),D-infinity) and (epsilon(infinity),E-infinity) are also considered. In general, crack growth is found to be larger when compared to that without the application of electric disturbances. This includes both the electric field and displacement. For the eight possible boundary conditions, crack growth retardation is identified only with (E-y(infinity),sigma(y)(infinity)) for negative E-y(infinity) and (D-y(infinity), epsilon(y)(infinity)) for positive D-y(infinity) while the mechanical conditions sigma(y)(infinity) or epsilon(y)infinity are not changed. Suitable combinations of the elastic, piezoelectric and dielectric material constants could also be made to suppress crack growth. (C) 2002 Published by Elsevier Science Ltd.
关键词	Piezoelectric Ceramics Energy Density Fracture-mechanics
DOI	10.1016/S0167-8442(02)00077-0
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000177739100001
关键词[WOS]	PIEZOELECTRIC CERAMICS ; ENERGY DENSITY ; FRACTURE-MECHANICS
WOS研究方向	Engineering ; Mechanics
WOS类目	Engineering, Mechanical ; Mechanics
引用统计	被引频次：31[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/33681
专题	力学所知识产出(1956-2008)
通讯作者	Sih, GC (reprint author), Xian Jiaotong Univ, Sch Adv Sci & Technol, POB 1175, Xian 710049, Shaanxi, Peoples R China.
推荐引用方式 GB/T 7714	Sih GC,Sih, GC . A field model interpretation of crack initiation and growth behavior in ferroelectric ceramics: change of poling direction and boundary condition[J]. Theoretical and Applied Fracture Mechanics,2002,38,1,:1-14.
APA	Sih GC,&Sih, GC .(2002).A field model interpretation of crack initiation and growth behavior in ferroelectric ceramics: change of poling direction and boundary condition.Theoretical and Applied Fracture Mechanics,38(1),1-14.
MLA	Sih GC,et al."A field model interpretation of crack initiation and growth behavior in ferroelectric ceramics: change of poling direction and boundary condition".Theoretical and Applied Fracture Mechanics 38.1(2002):1-14.

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