Journal ArticleDOI
Frequency-wavenumber domain analysis of guided wavefields.
TLDR
Full wavefield measurements obtained with either an air-coupled transducer mounted on a scanning stage or a scanning laser vibrometer can be combined with effective signal and imaging processing algorithms to support characterization of guided waves as well as detection, localization and quantification of structural damage.About:
This article is published in Ultrasonics.The article was published on 2011-05-01. It has received 236 citations till now. The article focuses on the topics: Guided wave testing & Laser scanning vibrometry.read more
Citations
More filters
Journal ArticleDOI
Characterization of impact damage in composite laminates using guided wavefield imaging and local wavenumber domain analysis.
TL;DR: Results show the promise of local wavenumber domain analysis to characterize the depth of delamination damage in composite laminates and can find application in automated vehicle health assurance systems with potential for high detection rates and greatly reduced operator effort and setup time.
Journal ArticleDOI
Complete noncontact laser ultrasonic imaging for automated crack visualization in a plate
TL;DR: In this paper, the authors presented an automated crack visualization technique using ultrasonic wavefield images obtained by a complete noncontact laser scanning system by integrating and synchronizing a Q-switched Nd:YAG laser for ultrasonic generation, a laser Doppler vibrometer and galvanometers for scanning.
Journal ArticleDOI
Recent Advances in Piezoelectric Wafer Active Sensors for Structural Health Monitoring Applications
TL;DR: The characterization of PWAS materials shows that no significant change in the microstructure after exposure to high temperature and nuclear radiation, and the PWAS transducer can be used in harsh environments for structural health monitoring (SHM) applications.
Journal ArticleDOI
Broadband plate-type acoustic metamaterial for low-frequency sound attenuation
TL;DR: In this paper, a plate-type acoustic metamaterial can serve to totally prohibit low frequency structure-borne sound at selective resonance frequencies ranging from 650 to 3500 Hz, where the relevant sound wavelength in air is about three orders of magnitude larger than the plate thickness.
Journal ArticleDOI
Identification of cracks in thin-walled structures by means of wavenumber filtering
TL;DR: In this article, a signal processing of full wavefield data is proposed for detection, localization and visualization of a crack growth in thin-walled structures. But the proposed method only out-of-plane velocities are used.
References
More filters
Book
Ultrasonic Waves in Solid Media
TL;DR: In this article, the theory of elasticity was introduced and basic formulas and concepts in complex variables in the theory and application of wave propagation were discussed. But the authors did not consider the effects of wave scattering on the wave propagation experiments.
BookDOI
Review of Progress in Quantitative Nondestructive Evaluation
TL;DR: The Review of Progress in Quantitative NDE (ROPQN) as mentioned in this paper is the world's leading conference in reporting annually new research and development results in quantitative NDE and promotes communication between the research and engineering communities and emphasize current reporting of work in progress.
Book
Structural Health Monitoring: with Piezoelectric Wafer Active Sensors
TL;DR: Structural Health Monitoring with Piezoelectric Wafer active sensors (PWAS) as mentioned in this paper is the first comprehensive textbook to provide background information, theoretical modeling, and experimental examples on the principal technologies involved in SHM.
Journal ArticleDOI
A two-dimensional Fourier transform method for the measurement of propagating multimode signals
D. N. Alleyne,Peter Cawley +1 more
TL;DR: In this article, a two-dimensional Fourier transform (2D FFT) was used to measure the amplitudes and velocities of the Lamb waves propagating in a plate, the output of the transform being presented using an isometric projection which gives a three-dimensional view of the wave-number dispersion curves.
Journal ArticleDOI
Active health monitoring of an aircraft wing with embedded piezoelectric sensor/actuator network: I. Defect detection, localization and growth monitoring
TL;DR: In this article, an ultrasonic guided wave structural health monitoring (SHM) system was developed for aircraft wing inspection, where small, low-cost and light-weight piezoelectric (PZT) discs were bonded to various parts of the aircraft wing, in a form of relatively sparse arrays, for simulated cracks and corrosion monitoring.
Related Papers (5)
A two-dimensional Fourier transform method for the measurement of propagating multimode signals
D. N. Alleyne,Peter Cawley +1 more