Optimum Structure Design of a Multilayer Piezo-Composite Disk for Control of Thermal Stress

Abstract

This article deals with a control problem of a thermal stress in a composite circular disk consisting of a transversely isotropic structural layer onto which multiple piezoelectric layers with concentrically arranged electrodes are perfectly bonded. When a prescribed heating temperature distribution acts on the structural layer surface, the optimum structure design of the composite disk is performed so that the maximum thermal stress in the structural layer is minimized subject to constraints on stresses in the piezoelectric layers. A hybrid optimization technique combining the particle swarm optimization with the simplex method is employed for solving the optimum design problem. To resolve the difficulty in solving the problem with many optimization variables, three improvements are added to the hybrid optimization technique and an efficient design method is introduced. For a composite disk constructed of a CFRP layer and cadmium selenide layers, the layer thicknesses, the electrode dimensions, and the voltages applied to the electrodes are determined and the numerical results are presented in tabular and graphical forms. Finally, it is shown from the optimum design results that the highest suppression ratio of the maximum thermal stress reaches 40.8% in the case of a five-layer composite disk and is considered to be almost saturated.

Vibration Control of MR-Damped Vehicle Suspension System Using PID Controller Tuned by Particle Swarm Optimization

“…For instance, PSO technique was found a very beneficial in parameter identification [4] and optimum structural design of a composite disk using piezoelectric layers [5,6].…”

Nonlinear multi-variable optimization of layered composites with nontraditional interfaces

“…The advantages of PSO over other techniques such as genetic algorithm are that it is algorithmically simpler, more robust and generally converges faster (Sunwoo et al 1991;Omran 2005). For the composite materials applications, Elsawaf et al (2012a) and Elsawaf et al (2012b) combined the particle swarm optimization with the simplex method to study the optimum structure design of a composite disk with single and multiple piezoelectric layers and to control the maximum thermal stress induced in the structural layer. Suresh et al (2007) presented a multi-agent PSO to design an optimal composite box-beam helicopter rotor blade.…”