An Experimental Assessment of PZT Patches for Impedance-Based SHM Applications

Author(s)

Dare de Almeida, Vinicius Augusto ; Baptista, Fabricio Guimaraes

• Document type: Journal article
• Source: INTERNATIONAL JOURNAL ON SMART SENSING AND INTELLIGENT SYSTEMS; v. 7, n. 5, p. 5-pg., 2014-12-01.

Abstract

In this paper, we present an alternative method for assessing the sensitivity of lead zirconate titanate (PZT) piezoceramics for damage detection in structural health monitoring (SHM) systems based on the electromechanical impedance (EMI) principle. An assessment of the sensitivity is obtained experimentally using the pencil lead break (PLB) method, which is frequently used in acoustic emission (AE) systems. Tests were carried out on an aluminum beam, and the results show a clear relationship between the damage indices obtained from the electrical impedance signatures of the PZT patch bonded to the monitored structure and the power spectral density (PSD) obtained using the PLB method. (AU)

• FAPESP's process: 13/16434-0 - Evaluation of the Pencil Lead Break Method for Sensitivity Assessment of Piezoelectric Transducers Applied in the Electromechanical Impedance Technique
• Grantee: Vinicius Augusto Dare de Almeida
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 12/10825-4 - Piezoelectric transducers applied in the structural health monitoring: design and temperature effects compensation
• Grantee: Fabricio Guimarães Baptista
• Support Opportunities: Regular Research Grants