Thermo-Electro-Mechanical Analysis of a Curved Functionally Graded Piezoelectric Actuator with Sandwich Structure

Materials

Zhi Yan¹  Mostafa Zaman¹ 

[1] Department of Mechanical and Materials Engineering, The University of Western Ontario, London, Ontario N6A 5B9, Canada;

关键词: functionally graded piezoelectric materials (FGPMs);    curved actuator;    sandwich structure;    thermal effect;    bimorph;   

DOI  :  10.3390/ma4122151

来源: mdpi

【 摘 要 】

In this work, the problem of a curved functionally graded piezoelectric (FGP) actuator with sandwich structure under electrical and thermal loads is investigated. The middle layer in the sandwich structure is functionally graded with the piezoelectric coefficient g₃₁ varying continuously along the radial direction of the curved actuator. Based on the theory of linear piezoelectricity, analytical solutions are obtained by using Airy stress function to examine the effects of material gradient and heat conduction on the performance of the curved actuator. It is found that the material gradient and thermal load have significant influence on the electroelastic fields and the mechanical response of the curved FGP actuator. Without the sacrifice of actuation deflection, smaller internal stresses are generated by using the sandwich actuator with functionally graded piezoelectric layer instead of the conventional bimorph actuator. This work is very helpful for the design and application of curved piezoelectric actuators under thermal environment.

【 授权许可】

CC BY   
© 2011 by the authors; licensee MDPI, Basel, Switzerland.