Optimum Design of Electrode Arrangements in a Multilayer Piezo-Composite Disk for Control of Thermal Stress

Journal of Computational Science and Technology

Ahmed ELSAWAF²  Fumihiro ASHIDA¹  Sei-ichiro SAKATA¹ 

[1] Department of Electronic and Control Systems Engineering, Shimane University;Graduate School of Shimane University

关键词: Elasticity;    Thermal Stress;    Stress Control;    Optimum Design;    Piezoelectric Actuation;    Multilayer Composite Disk;    Smart Structure;   

DOI  :  10.1299/jcst.4.77

学科分类：地球科学(综合)

来源: Japan Academy

【 摘 要 】

References(10)Cited-By(1)This paper deals with a control problem of a thermal stress in a composite circular disk consisting of a structural layer onto which multiple piezoceramic layers with concentrically arranged electrodes are bonded. When a heating temperature distribution acts on the bottom surface of the structural layer, the maximum thermal stress in the structural layer is minimized by applying appropriate voltages to the electrodes. The stepwise voltage applied to each electrode is obtained by solving a linear programming problem when constrains are imposed on stresses in the piezoceramic layers. In order to decrease design variables such as the layer thicknesses and the number and dimensions of electrodes, an efficient method for the optimum design is developed. The structure of the composite disk as well as the electrode arrangement on each piezoceramic layer has been optimally designed so that performance of the stress control is maximized. Finally, it is seen from numerical results that the maximum thermal stress in the structure layer is reduced by 38.3% which is 4.6% higher than that obtained in the previous paper.

【 授权许可】

Unknown