Accession Number : ADA294459

Title :   Flutter Control of an Adaptive Laminated Composite Panel with Piezoelectric Layers.

Descriptive Note : Final rept. Sep 92-Aug 94,

Corporate Author : WRIGHT LAB WRIGHT-PATTERSON AFB OH

Personal Author(s) : Suleman, Afzal ; Venkayya, Vipperla

PDF Url : ADA294459

Report Date : AUG 1994

Pagination or Media Count : 77

Abstract : A new finite element formulation of an adaptive composite laminated panel with piezoelectric sensors and actuators is presented. Classical laminated theory with electromechanical induced actuation and variational principles are used to formulate the equations of motion. The finite element model based on the bilinear Mindlin plate theory with 24 structural degrees of freedom and one electrical degree of freedom per piezoelectric layer is much simpler and computationally more efficient than models based on solid element formulations with a significant decrease in the number of degrees of freedom. The numerical results from simulations agree well with data reported in the literature. Next, the effectiveness of using the adaptive composite panel to control panel flutter is examined. First order piston theory is used to model the supersonic flow. The piezoelectric actuators are used passively to induce inplane forces to alter the panel stiffness characteristics. The results show that piezoelectric devices can significantly increase panel flutter velocities. However, it was found that the added mass to stiffness ratio and the piezoelectric patch configuration are two factors affecting actuator performance. JG

Descriptors :   *LAYERS, *LAMINATES, *COMPOSITE STRUCTURES, *PIEZOELECTRIC MATERIALS, *ADAPTIVE SYSTEMS, *FLUTTER, *CONTROL PANELS, STRESS STRAIN RELATIONS, MATHEMATICAL MODELS, SIMULATION, PISTONS, EQUATIONS OF MOTION, DETECTORS, PERFORMANCE(ENGINEERING), COMPOSITE MATERIALS, MASS, FINITE ELEMENT ANALYSIS, STIFFNESS, FORMULATIONS, NUMERICAL ANALYSIS, SOLIDS, ELECTRICAL PROPERTIES, ELECTROMECHANICAL DEVICES, CONFIGURATIONS, ACTUATORS, SUPERSONIC FLOW, ELECTRICAL EQUIPMENT, VARIATIONAL PRINCIPLES.

Subject Categories : Laminates and Composite Materials
      Electrical and Electronic Equipment
      Electricity and Magnetism
      Fluid Mechanics
      Mechanics
      Human Factors Engineering & Man Machine System

Distribution Statement : APPROVED FOR PUBLIC RELEASE