Damage analysis of tetragonal perovskite structure ceramics implicated by asymptotic field solutions and boundary conditions
文献类型：期刊论文
| 作者 | Sih GC; Song ZF |
| 刊名 | Theoretical and Applied Fracture Mechanics
 |
| 出版日期 | 2002 |
| 卷号 | 38期号:1页码:15-36 |
| 关键词 | Piezoelectric Ceramics Fracture-Mechanics Molecular-Dynamics Crack Simulation Actuators Behavior Model |
| ISSN号 | 0167-8442 |
| 通讯作者 | Sih, GC (reprint author), Xian Jiaotong Univ, Sch Adv Sci & Technol, Box 1175, Xian 710049, Shaanxi, Peoples R China. |
| 中文摘要 | Cracking of ceramics with tetragonal perovskite grain structure is known to appear at different sites and scale level. The multiscale character of damage depends on the combined effects of electromechanical coupling, prevailing physical parameters and boundary conditions. These detail features are exhibited by application of the energy density criterion with judicious use of the mode I asymptotic and full field solution in the range of r/a = 10(-4) to 10(-2) where r and a are, respectively, the distance to the crack tip and half crack length. Very close to the stationary crack tip, bifurcation is predicted resembling the dislocation emission behavior invoked in the molecular dynamics model. At the macroscopic scale, crack growth is predicted to occur straight ahead with two yield zones to the sides. A multiscale feature of crack tip damage is provided for the first time. Numerical values of the relative distances and bifurcation angles are reported for the PZT-4 ceramic subjected to different electric field to applied stress ratio and boundary conditions that consist of the specification of electric field/mechanical stress, electric displacement/mechanical strain, and mixed conditions. To be emphasized is that the multiscale character of damage in piezoceramics does not appear in general. It occurs only for specific combinations of the external and internal field parameters, elastic/piezoelectric/dielectric constants and specified boundary conditions. (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 ; FRACTURE-MECHANICS ; MOLECULAR-DYNAMICS ; CRACK ; SIMULATION ; ACTUATORS ; BEHAVIOR ; MODEL |
| 收录类别 | SCI ; EI |
| 语种 | 英语 |
| WOS记录号 | WOS:000177739100002 |
| 公开日期 | 2009-08-03 ; 2010-06-13 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/33683]  |
| 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,Song ZF. Damage analysis of tetragonal perovskite structure ceramics implicated by asymptotic field solutions and boundary conditions[J]. Theoretical and Applied Fracture Mechanics,2002,38(1):15-36. |
| APA | Sih GC,&Song ZF.(2002).Damage analysis of tetragonal perovskite structure ceramics implicated by asymptotic field solutions and boundary conditions.Theoretical and Applied Fracture Mechanics,38(1),15-36. |
| MLA | Sih GC,et al."Damage analysis of tetragonal perovskite structure ceramics implicated by asymptotic field solutions and boundary conditions".Theoretical and Applied Fracture Mechanics 38.1(2002):15-36. |
入库方式： OAI收割
来源：力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。