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Cure monitoring using ultrasonic guided waves in wires
The Journal of the Acoustical Society of America, 2003The possibility of using ultrasonic guided waves for monitoring the cure process of epoxy resins is investigated. The two techniques presented use a wire waveguide which is partly embedded in the resin. The first technique is based on the measurement of attenuation due to leakage of bulk waves into the resin surrounding the waveguide.
T, Vogt, M, Lowe, P, Cawley
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Mode repulsion of ultrasonic guided waves in rails
Ultrasonics, 2018Accurate computation of dispersion characteristics of guided waves in rails is important during the development of inspection and monitoring systems. Wavenumber versus frequency curves computed by the semi-analytical finite element method exhibit mode repulsion and mode crossing which can be difficult to distinguish.
Philip W, Loveday +2 more
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Guides “bimorphes” d'ondes ultrasoniques “bimorph” ultrasonic wave guides”
International Journal of Engineering Science, 1983Resume L'analyse de la dispersion des ondes elastiques est effectuee dans deux genres de guides ultrasoniques, longs, appeles “bimorphes”: (i) un guide “tri-laminaire” constitue par la superposition de trois couches de deux materiaux differents et (ii) un guide a “noyau rectangulaire gaine” obtenu en enveloppant une tige a section rectangulaire par ...
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Ultrasonic guided wave scattering in a plate overlap
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2005Guided wave scattering in a plate overlap is investigated by numerical calculations and experimental measurements of transmission and reflection factors from the overlap region. In the numerical study, a hybrid boundary element-finite element method is used to calculate the guided wave scattered field from the overlap region.
Won-Joon, Song +3 more
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Ultrasonics Guided Waves for Piping Inspection
1997An ultrasonic guided wave system for pipe inspection is proposed. Using guided wave experience to date on a variety of different tubing problems, feasibility experiments have already been conducted on piping under insulation in both a laboratory and chemical processing facility field environment. Several guided wave techniques are introduced, one using
Rose, Joseph, Jiao, Dale, Spanner, Jack
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COMPUTATIONAL METHODS FOR GUIDED ULTRASONIC WAVES IN PLATES
International Journal of Computational Methods, 2006Reducing the general problem of computing three-dimensional Green's function in a transversely isotropic plate to a finite summation of contributions from a series of planar problems can efficiently yield an accurate solution. Hence, solving the planar scattering problem, of the Pressure-Shear-Vertical (PSV) type or the Shear-Horizontal (SH) type, was
Shah, Arvind, Mahmoud, Abdel-Rahman
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Guided Wave Electromagnetic Ultrasonic Scattering Imaging
2019At present, there are few studies on the defect imaging using guided wave scattering method. Most of the defect detection based on guided wave scattering is limited to the location of the defects, and the defects studied are mostly artificial defects of standard contour shape. The researches on defect imaging utilized transmitted guided waves. However,
Songling Huang +4 more
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Non-contact ultrasonic guided wave inspections of rails
SPIE Proceedings, 2014The University of California at San Diego (UCSD), under a Federal Railroad Administration (FRA) Office of Research and Development (R&D) grant, is developing a system for high-speed and non-contact rail integrity evaluation. A prototype using an ultrasonic air-coupled guided wave signal generation and air-coupled signal detection in pair with a real ...
Nguyen T. V. +2 more
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Ultrasonic magnetostrictive transducers for guided ultrasonic waves in thin wires
SPIE Proceedings, 2007The magnetostrictive effect is used to generate ultrasonic waves for a variety of health monitoring applications. Given the ductile nature of many ferromagnetic materials and the common geometrical configuration of magnetic inductance coils, magnetostrictive generation of ultrasound is especially suitable for long cylindrical waveguides such as thin ...
Matthew M. Kropf, B. R. Tittmann
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The Electromagnetic Ultrasonic Guided Wave Testing
2016As an important branch of the nondestructive testing field, ultrasonic testing is widely used in the steel, electric power, petroleum, transportation, and medical and other industries. In the process of ultrasonic testing, the ultrasonic transducer is the core component of excitation and reception of ultrasonic waves, mainly including the piezoelectric
Songling Huang, Shen Wang
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