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S Jafari Fesharaki 



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

Article 12Volume 9, Issue 4, Autumn 2017, Page 832-848  PDF (2663 K)
Document Type: Research Paper
Authors
S Jafari Fesharaki  1S.Gh Madani2S 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
OptimizationPiezoelectric patchesStiffnessparticle Swarm optimization
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