A field model interpretation of crack initiation and growth behavior in ferroelectric ceramics: change of poling direction and boundary condition
文献类型：期刊论文
| 作者 | Sih GC |
| 刊名 | Theoretical and Applied Fracture Mechanics
 |
| 出版日期 | 2002 |
| 卷号 | 38期号:1页码:1-14 |
| 关键词 | Piezoelectric Ceramics Energy Density Fracture-Mechanics |
| ISSN号 | 0167-8442 |
| 通讯作者 | Sih, GC (reprint author), Xian Jiaotong Univ, Sch Adv Sci & Technol, POB 1175, Xian 710049, Shaanxi, Peoples R China. |
| 中文摘要 | 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. |
| 类目[WOS] | Engineering, Mechanical ; Mechanics |
| 研究领域[WOS] | Engineering ; Mechanics |
| 关键词[WOS] | PIEZOELECTRIC CERAMICS ; ENERGY DENSITY ; FRACTURE-MECHANICS |
| 收录类别 | SCI ; EI |
| 语种 | 英语 |
| WOS记录号 | WOS:000177739100001 |
| 公开日期 | 2009-08-03 ; 2010-06-13 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/33681]  |
| 专题 | 力学研究所_力学所知识产出(1956-2008) |
| 推荐引用方式 GB/T 7714 | 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.(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."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. |
入库方式： OAI收割
来源：力学研究所
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