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Predictive Modeling of Piezoelectric Wafer Active Sensors for Structural Health Monitoring
Lin, B.; Gresil, M.; Cuc, A.; Giurgiutiu, V.
Ferroelectrics. 2014;:168-182.
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Abstract
Piezoelectric wafer active sensors (PWAS) are lightweight and inexpensive transducers made from ferroelectric piezoceramic wafers attached to safety-critical structure. PWAS transducers enable a large class of structural health monitoring (SHM) applications. The focus of this paper is on the predictive modeling of structurally-attached PWAS. After a brief introduction, the paper reviews the PWAS-based SHM principles. Then, it follows with a discussion of shear-lag analysis, the transfer matrix method approach and the investigation of power and energy transduction between PWAS and structure. Finally, the paper presents a multi-physics finite element (MP-FEM) simulation. The paper ends with summary and conclusion.
Keyword(s)
PWAS; impedance; multi-physics modeling; structural health monitoring