Lamb Waves Tunning On Aluminium Plates for Structure Health Monitoring
Journal Title: INCAS BULLETIN - Year 2014, Vol 6, Issue 1
Abstract
The method for defects detection inside the mechanical structures, namely aerospace structures, using the Lamb waves is widespread because of its benefits: it is nondestructive, may reveal the presence and size of defects with high accuracy and does not require any expensive equipment for application. One of the ways to implement this method consists in mechanically exciting a point of the plate using a piezoelectric actuator followed by the signal collection by means of a piezoelectric transducer located in another point of the same plate surface. By interpreting the shape, the phase and amplitude of the collected signal the presence of a defect, its type and size can be highlighted. As a specimen of mechanical structure, a rectangular aluminum plate has been used. The generation of the Lamb waves in the plate was performed with a signal of certain optimal frequency values that need to be determined in advance. The procedure for determining the optimal frequency values is called tuning and consists in measuring and processing the signals amplitude values for multiple frequencies of the excitation signal, ranging between 10-800 kHz. The article deals both with the procedure description and the relevant results obtained for aluminum plates of different sizes.
Authors and Affiliations
SALAORU Tiberiu Adrian , TOADER Adrian , ARGHIR Minodor , ANDREI Marina , TUDOSE Mihai , POPESCU Ioana , DONCIU Cristiana
Keywords
Related Articles
- EP ID EP131351
- DOI 10.13111/2066-8201.2014.6.1.7
- Views 94
- Downloads 0
BOOK REVIEWS: Rocket Propulsion Elements, George P. SUTTON, Oscar BIBLARZ, John Wiley & Sons, New Jersey, 2010, 8th Edition, ISBN 978-0-470-08024-5
Inertial Sensor Signals Denoising with Wavelet Transform
In the current paper we propose a new software procedure for processing data from an inertial navigation system boarded on a moving vehicle, in order to achieve accurate navigation information on the displacement of the...
Restructuring of advanced instruction and training programs in order to increase the number of flight hours for military pilots. Part II
Converting the DC school jet aircraft into SC advanced training aircraft - and use them for the combat training of military pilots from the operational units, has become a necessity due to the budget cuts for Air Force,...
Global Optimized Shapes of Flying Configurations Compared with Those of Gliding Birds
The determination of global optimized (GO) shape of a flying configuration (FC) (namely, the simultaneous optimization of its camber, twist and thickness distributions and also of the similarity parameters of its planfor...
A Coordinate Transformation for Unsteady Boundary Layer Equations
This paper presents a new coordinate transformation for unsteady, incompressible boundary layer equations that applies to both laminar and turbulent flows. A generalization of this coordinate transformation is also propo...