Results 191 to 200 of about 737,665 (254)

ULTRASONIC TESTING WITH LAMB WAVES

, 1956
openaire   +2 more sources

Depth-Dependent Characterization of Vertical Cracks in Concrete Using Lamb Wave Active Sensing. [PDF]

Sensors (Basel)
Srisapan N, Asumah T, Askari R.
europepmc   +1 more source

Advanced Sensing Technology in Structural Health Monitoring. [PDF]

Sensors (Basel)
D'Emilia G, Natale E.
europepmc   +1 more source

Ultrafast Optoacoustics Reveals Intricate 3D Anisotropic Elasticity in Nanocrystalline Membranes. [PDF]

Adv Sci (Weinh)
Zhang S, He Y, Luo G, Huang J, Yip PS, Cui H, Zhang W, Wang Z, Ye L, Lu Y, Su Z, Li Y.   +11 more
europepmc   +1 more source

Two-Signal Set and Adaptive Spectral Decomposition Algorithm for Estimating the Phase Velocity of Dispersive Lamb Wave Mode. [PDF]

Sensors (Basel)
Draudvilienė L, Meškuotienė A, Gadeikytė A, Lapienis P.   +3 more
europepmc   +1 more source

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The interaction of Lamb waves with defects

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 1992
The interaction of individual Lamb waves with a variety of defects simulated by notches is investigated using finite-element analysis, and the results are checked experimentally. Excellent agreement is obtained. It is shown that a 2-D Fourier transform method may be used to quantify Lamb wave interactions with defects.
Peter Cawley
exaly   +3 more sources

LAMB WAVES IN A POROELASTIC PLATE

Journal of Computational Acoustics, 2013
In this paper we consider the propagation of Lamb waves in a poroelastic plate containing a linear crack, the special case where the surface of the plate is unloaded, by employing the Wiener-Hopf technique. The problem we solve here is a mathematically interesting toy problem. Physically speaking the more reasonable problem would be to consider there
Gilbert, Robert P., Lee, Doo-Sung, Ou, M. Yvonne   +2 more
openaire   +1 more source

Localization of notches with Lamb waves

The Journal of the Acoustical Society of America, 2003
A time–frequency representation (TFR) is used to analyze the interaction of a multimode and dispersive Lamb wave with a notch, and then serves as the basis for a correlation technique to locate the notch. The experimental procedure uses a laser source and a dual-probe laser interferometer to generate and detect Lamb waves in a notched plate.
Rüdiger, Benz, Marc, Niethammer, Stefan, Hurlebaus, Laurence J, Jacobs   +3 more
openaire   +2 more sources

Lamb Wave Frequency Diverse Array

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2022
The imaging method based on the conventional phased array (PA) can only realize angle focusing. To break through the above limitations, frequency diverse array (FDA) is first introduced from radar to Lamb wave, which opens up a possibility to realize angle-range focusing in damage localization. The energy pattern of FDA without considering the features
Yanfeng Lang, Zhibo Yang, Laihao Yang, Xuefeng Chen   +3 more
openaire   +2 more sources

Time-reversed Lamb waves

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 1998
Lamb waves are extensively involved in plate structure inspection because of their guided nature. However, their dispersive nature often limits their use in flaw detection. In this paper we show that the use of a time-reversal mirror (TRM) allows to automatically compensate for the dispersive nature of Lamb waves.
R K, Ing, M, Fink
openaire   +2 more sources