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Increasing the scanning range of Lamb wave based SHM systems by optimizing the actuator–sensor design

Willberg, Christian and Duczek, Sascha and Gabbert, Ulrich (2013) Increasing the scanning range of Lamb wave based SHM systems by optimizing the actuator–sensor design. CEAS Aeronautical Journal. Springer. DOI: 10.1007/s13272-012-0052-x

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Official URL: http://link.springer.com/article/10.1007/s13272-012-0052-x

Abstract

Piezoelectric induced ultrasonic Lamb waves can easily be used for the development of structural health monitoring systems for aircraft and other thin-walled structures. The reduction of the excited wave amplitudes depends mainly on the traveling distance and the material damping, especially in composite materials which restricts the maximum scanning distance between a piezoelectric actuator and a sensor. But there are several possibilities to increase the scanning range of Lamb waves. In the present paper, the focus is on the influence of the adhesive layer and the resonances of the actuator to increase the amplitudes of the excited wave. The objective is to excite Lamb waves with higher amplitudes without increasing the electrical energy for the wave excitation. In the paper, a numerical optimization is proposed which aims at increasing the wave amplitudes by optimizing sensor parameters and the excitation frequency. It has been found that small changes in the geometry of the piezoelectric actuator patch and the use of an optimized excitation frequency elevate the amplitudes of waves significantly.

Item URL in elib:https://elib.dlr.de/80834/
Document Type:Article
Title:Increasing the scanning range of Lamb wave based SHM systems by optimizing the actuator–sensor design
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Willberg, ChristianBS-FAUNSPECIFIED
Duczek, SaschaOtto-von-Guericke-Universität MagdeburgUNSPECIFIED
Gabbert, UlrichOtto-von-Guericke-Universität MagdeburgUNSPECIFIED
Date:2013
Journal or Publication Title:CEAS Aeronautical Journal
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
DOI :10.1007/s13272-012-0052-x
Publisher:Springer
Status:Published
Keywords:FEM, � Optimization, � Lamb wave, � SHM, Adhesive layer
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation & Validation (old)
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Structural Mechanics
Deposited By: Willberg, Dr.-Ing. Christian
Deposited On:25 Jan 2013 09:34
Last Modified:31 Jul 2019 19:39

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