作者：

Michael Krommer^a*, Pelin Berik^a, Yury Vetyukov^b & Ayech Benjeddou^c

作者单位：

a Institute for Technical Mechanics, Johannes Kepler University Linz, Altenbergerstr.69, A-4040, Linz, Austria

b Linz Center of Mechatronics GmbH, Altenbergerstr.69, A-4040, Linz, Austria

c SUPMECA, Structures, 3 rue Fernand Hainaut-93407 Saint Ouen CEDEX, France

关键词：

• piezoelectric d ₁₅ - effect, bi-morph torsion actuator, exact Saint-Venant-type solution, numerical validation

摘要：

This paper is concerned with the detailed analysis of the behavior of a piezoceramic bi-morph torsion actuator using the d ₁₅-effect. The bi-morph actuator is made of two oppositely polarized adjacent piezoceramic prismatic beams. The mathematical analysis is based on the Saint-Venant torsion theory; a formulation of the electromechanically coupled problem in terms of a stress function and of the electric potential is derived, which represents an exact solution of a specific three-dimensional problem; in particular, for the case when the axial stress and the axial component of the electric displacement vector are independent of the axial coordinate. The resulting boundary-value problem in the cross-section is solved using the method of finite differences. Solutions for the actuated rate of twist are presented and compared to three-dimensional electromechanically coupled finite element solutions using ABAQUS^® for the case of a cantilevered bi-morph actuator. A very good agreement is found.

文章全文下载地址：

http://www.tandfonline.com/doi/full/10.1080/19475411.2011.649807#.U89kRrJ7LFg 

整理源自Taylor & Francis Online

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