A comparative study on the effectiveness of piezoelectric patches for active composite panels with surface-mounted and embedded sensors and actuators

Richard Russ; Mehrdad N. Ghasemi-Nejhad

doi:10.1117/12.483396

5 August 2003 A comparative study on the effectiveness of piezoelectric patches for active composite panels with surface-mounted and embedded sensors and actuators

Richard Russ, Mehrdad N. Ghasemi-Nejhad

Author Affiliations +

Proceedings Volume 5056, Smart Structures and Materials 2003: Smart Structures and Integrated Systems; (2003) https://doi.org/10.1117/12.483396
Event: Smart Structures and Materials, 2003, San Diego, California, United States

Abstract

This study focuses on the effectiveness of the piezoelectric patches either surface-mounted or embedded for different composite laminate thicknesses. Primarily, two finite element models (FEMs) are considered for this study. The first FEM considers beams with varying thicknesses and non-collocated surface-mounted piezoelectric patches as sensor and actuator. Typical results are shown for four and eight layers graphite/epoxy composite laminates. The second FEM deals with embedded non-collocated piezoelectric patches as sensor and actuator for beams with varying thicknesses. For the embedded case one extra layer is needed to cover the piezoelectric patch and one extra cut-out layer to fill the area around the piezoelectric patch. Therefore, a composite beam for the embedded case in comparison to the surface-mounted case has always four extra constraint layers. Typical results, for these two cases, are compared for the beams with the same number of inner layers (i.e. four and eight). A surface-mounted ACX piezoelectric patch acts as a shaker in both FEMs. Numerical and experimental results from modal and harmonic analyses were compared and excellent comparisons were achieved. Cross-examination between these two FEMs determined the following. 1) The effectiveness of piezoelectric patches acting as an actuator with respect to the laminate thicknesses and the actuator distance from the beam neutral axis for both cases. 2) The influence of the constraint layers on the performance of the embedded piezoelectric patches.

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Richard Russ and Mehrdad N. Ghasemi-Nejhad "A comparative study on the effectiveness of piezoelectric patches for active composite panels with surface-mounted and embedded sensors and actuators", Proc. SPIE 5056, Smart Structures and Materials 2003: Smart Structures and Integrated Systems, (5 August 2003); https://doi.org/10.1117/12.483396

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KEYWORDS

Actuators

Piezoelectric effects

Sensors

Composites

Finite element methods

Current controlled current source

Modal analysis

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