| 压电介质表面圆形电极边缘的电-弹场分析 |
| |
| 引用本文： | 黄上恒,汪华苗.压电介质表面圆形电极边缘的电-弹场分析[J].应用力学学报,2004,21(1):106-109. |
| |
| 作者姓名： | 黄上恒 汪华苗 |
| |
| 作者单位： | 1. 西安交通大学,西安,710049
2. 清华大学,北京,100084 |
| |
| 基金项目： | 教育部“教育振兴行动计划”资助项目 |
| |
| 摘 要： | 基于线性压电理论，研究了表面附有圆形电极板的半无限压电介质电极边缘的电弹场奇异分布特性。利用Hankel变换技术，将空间轴对称混合边值问题简化为一组对偶积分方程的求解，并得到了应力分量和电位移分量的解析表达式。算例表明在电极边缘的邻域内存在剧烈的应力集中和电位移增强，足以造成介质的脆性断裂或介质击穿。并对这种类裂纹奇异性质进行了讨论。
|
| 关 键 词： | 压电介质 圆形电极 电位移增强 应力集中 Hankel变换 介质击穿 脆性断裂 |
| 文章编号： | 1000-4939(2004)01-0106-04 |
Electro-Elastic Fields Arising near Circular Electrode Border on Piezoelectric Medium Surface |
| |
| Huang Shangheng,Wang Huamiao.Electro-Elastic Fields Arising near Circular Electrode Border on Piezoelectric Medium Surface[J].Chinese Journal of Applied Mechanics,2004,21(1):106-109. |
| |
| Authors: | Huang Shangheng Wang Huamiao |
| |
| Institution: | Huang Shangheng 1 Wang Huamiao 2 |
| |
| Abstract: | Based on linear piezoelectricity, the singularly distributed stresses and electric displacement in the surface electrode border vicinity are investigated. Hankel transform is adopted to reduce the spacially axisymmetric problem with mixed boundary conditions into a pair of dual integral equations. And the components of stress and electric displacement are solved analytically. A numerical example reveals that strongly concentrated stresses and extremely intensified electric displacements near the electrode border are high enough to puncture or fracture the piezoelectric medium. The "like crack" features are discussed in some detail. |
| |
| Keywords: | piezoelectric medium electrode stress concentration electric displacement intensification |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
