Title :
Active piezo-electric damping composites
Author :
Baz, A. ; Tempia, A.
Author_Institution :
Dept. of Mech. Eng., Maryland Univ., College Park, MD, USA
Abstract :
Active piezo-electric damping composites (APDC) consisting of piezoelectric rods, which are obliquely embedded across the thickness of a viscoelastic damping matrix, are presented. In this configuration, activation of the piezo-rods simultaneously enhances both the shear and compression damping characteristics of the composite. With such active/passive capabilities, the APDC presents a viable and effective means for controlling structural vibration and noise. Emphasis is placed on modeling the electromechanical coupling characteristics of the APDC using an effective homogeneous medium approach. The developed model accounts for the volume fraction of the piezo-rods, and the properties of the constituent rods and damping matrix. The optimal inclination angles of the piezo-rods are determined for various APDC configurations in order to maximize the electro-mechanical coupling factor. The obtained results suggest that using the oblique-rod configuration can enhance the electromechanical coupling significantly
Keywords :
active noise control; damping; filled polymers; intelligent materials; piezoceramics; vibration control; active piezo-electric damping composites; compression damping; electromechanical coupling characteristics; homogeneous medium approach; noise control; optimal inclination angles; piezoelectric rods; shear; structural vibration; viscoelastic damping matrix; Acoustic transducers; Active noise reduction; Bonding; Damping; Educational institutions; Mechanical engineering; Piezoelectric films; Polymers; Vibration control; Viscosity;
Conference_Titel :
Decision and Control, 1998. Proceedings of the 37th IEEE Conference on
Conference_Location :
Tampa, FL
Print_ISBN :
0-7803-4394-8
DOI :
10.1109/CDC.1998.757929
