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Proceedings Paper

Characterization of guided wave propagation with piezoelectric wafer actuators in prestressed plates
Author(s): F. Song; G. L. Huang
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Paper Abstract

Plate-like aerospace engineering structures are prone to mechanical/residual load during flight operation. The mechanical/residual prestresses can cause significant changes in guided-wave (GW) propagation for structural health monitoring (SHM) systems. The paper focuses on the characterization of the GW propagation using surfacebonded piezoelectric wafer actuators in metallic spacecraft plates under prestresses. First, a new in-plane analytical model with coupled piezo-elastodynamics is proposed to quantitatively capture the dynamic load transfer between a thin piezoelectric actuator bonded onto an isotropic plate that is subject to prestresses. Based on the developed model, effects of prestresses on the GW propagation generated by piezoelectric actuators are then analyzed and demonstrated. It can be found that the both time-of-flight and amplitude of wave responses can be affected by the presence of prestresses in plates. The results hopefully provide useful information for the real-time SHM.

Paper Details

Date Published: 30 March 2011
PDF: 12 pages
Proc. SPIE 7984, Health Monitoring of Structural and Biological Systems 2011, 79840A (30 March 2011); doi: 10.1117/12.880231
Show Author Affiliations
F. Song, Univ. of Arkansas at Little Rock (United States)
G. L. Huang, Univ. of Arkansas at Little Rock (United States)

Published in SPIE Proceedings Vol. 7984:
Health Monitoring of Structural and Biological Systems 2011
Tribikram Kundu, Editor(s)

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