S Jafari Fesharaki 

Investigating the Effect of Stiffness/Thickness Ratio on the Optimal Location of Piezoelectric Actuators Through PSO Algorithm

Article 12, Volume 9, Issue 4, Autumn 2017, Page 832-848  PDF (2663 K)

Document Type: Research Paper

Authors

S Jafari Fesharaki  ¹; S.Gh Madani²; S Golabi²

¹Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran

²Department of Mechanical Engineering, Faculty of Engineering, University of Kashan, Kashan, Iran

Abstract

This article has studied the effect of ratio of stiffness and thickness between piezoelectric actuators and host plat has been explored on optimal pattern for placement of piezoelectric work pieces around a hole in thin isotropic plate under static loading to reduce stress concentration. The piezoelectric actuators reduce directly or indirectly the stress concentration by applying positive and negative strains on the host plate. For this purpose, various modes as the thickness/stiffness ratios of the plate to the piezoelectric patches as ≥1 or ≤1 were considered. Then, a Python code was developed using particle swarm optimization algorithm in order to achieve the best model of piezoelectric actuators around the hole for maximum reduction in stress concentration factor. Also, the maximum stress concentration on the top and bottom of the hole was moved to another point around the edge by changing the location of piezoelectric patches. The results obtained from software solutions were confirmed by experimental tests. 

Keywords

Optimization; Piezoelectric patches; Stiffness; particle Swarm optimization

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