On the electroelastic behaviour of a thin piezoelectric actuator attached to an infinite host structure
On the electroelastic behaviour of a thin piezoelectric actuator attached to an infinite host structure
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DOI：
10.1016/s0020-7683(99)00118-3
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发表时间：
2000-06
影响因子：
3.6
通讯作者：
Xiaodong Wang;S. Meguid
中科院分区：
文献类型：
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作者：
Xiaodong Wang;S. Meguid
在本文中，我们研究了一个薄的压电陶瓷致动器嵌入或粘接到一个弹性介质下的平面内的机械和电气负载的机电耦合行为。驱动器的特点是由一个电弹性线模型与极化方向垂直于其长度。理论配方，管理这个机电耦合问题，是基于使用奇异积分方程的界面剪切应力。一个平方根的奇异性所产生的剪切应力被发现在尖端的致动器。通过求解这些奇异积分方程，利用切比雪夫多项式展开，得到了一个新的剪应力奇异因子。通过典型算例分析了驱动器的几何形状、材料组合和界面脱粘对剪切应力奇异因子的影响。
In this paper, we examine the coupled electromechanical behaviour of a thin piezoceramic actuator embedded in or bonded to an elastic medium under inplane mechanical and electrical loadings. The actuator is characterized by an electroelastic line model with the poling direction being perpendicular to its length. The theoretical formulations, governing this electromechanically coupled problem, are based upon the use of singular integral equations in terms of an interfacial shear stress. A square-root singularity of the resulting shear stress is found at the tips of the actuator. A new shear stress singularity factor (SSSF) was then obtained by solving these singular integral equations using Chebyshev polynomial expansions. Typical examples are provided to show the effect of the geometry of the actuator, the material combination and interfacial debonding upon the shear stress singularity factor.