So… is this a surface-breaking crack?
نویسندگان
چکیده
منابع مشابه
Resonances and Crack Roughness Effects in Surface Breaking Cracks
This study deals with two different aspects of scattering from the cracks. The first one is the measurement of crack resonances by local probes and the second is the effect of the roughness of the crack forces on the scattering data. Unlike the scattering measurement reported elsewhere, these measurements of crack resonances are to be performed by local probes. Two different types of probes are...
متن کاملDetection of a Surface-Breaking Crack Depth by Using the Surface Waves of Multiple Laser Beams
A laser ultrasonic system is a non-contact inspection device with a long stand-off distance and it is applicable to hard-to-access locations such as in a nuclear power plant. In this paper, multiple surface waves generated by line-shaped multiple pulse laser beams are adopted to precisely detect a surface-breaking crack with its depth information. When a surface crack is positioned at the cente...
متن کاملDetection of a Surface-breaking Crack by Using the Frequency Attenuation in a Laser Ultrasonic Spectrum
Laser ultrasonic system is a non-contact inspection device with a high spatial resolution and it is applicable to hard-to-access locations like in a nuclear power plant. In this paper, we have attempted to detect the depth of a surface-breaking crack by using the surface wave of a laser ultrasound. We have investigated a variation of the peak-to-valley value in the time domain and the spectrum ...
متن کاملInterference of corner reflected and edge diffracted signals for a surface-breaking crack
Backscatter of time-harmonic longitudinal waves from a surface-breaking crack is investigated in the highfrequency range. It is assumed that the distance of the transducer to the crack is large as compared to the crack depth, and that the incident rays are normal to the crack edge. The crack length is assumed much greater than its depth. A two-dimensional model for the transducer is considered....
متن کاملUsing air-coupled sensors to determine the depth of a surface-breaking crack in concrete.
Previous studies showed that the surface wave transmission coefficient across a surface-breaking crack in concrete can be used to estimate the crack depth. However, inconsistencies in the surface wave transmission measurements limit the test accuracy and application of this technique. The inconsistencies come from near-field scattering by the crack tip and inconsistent sensor coupling condition...
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ژورنال
عنوان ژورنال: Journal of Mechanics of Materials and Structures
سال: 2006
ISSN: 1559-3959
DOI: 10.2140/jomms.2006.1.743