Fundamental Frequency Reduction of Bending-Extension Coupled Composite BeamsBonded With Actuator(s)

摘要

This paper presents the results of three closely related dynamic studies on thefundamental frequency reduction of beams made of bending-extension (b-e) coupled fiber-reinforced composites, such as N-layered regular (equal thickness layers) antisymmetric cross-ply laminates. The composite beams considered in the three studies are, respectively, bare beam, bonded to both sides of the beam by two same-sized PzT (lead zirconium titanate) actuators, and bonded to only one side of the beam by the actuator. For each study, free vibration analyses have been conducted on beams with simple supports and made of cross-ply laminates both with and without the b-e coupling properties to assess the fundamental frequency reduction due to b-e coupling properties.