Lamb Wave Phase Velocity Imaging of Concrete Plates with 2D Arrays
نویسندگان
چکیده
منابع مشابه
Multi-Mode and Multi-Frequency Differential Lamb Wave Imaging with in situ Sparse Transducer Arrays
Application of ultrasonic methods to structural health monitoring requires a compromise between coverage and complexity, making it desirable to use as few transducers as possible to cover the largest area. Such a consideration leads to the use of very sparse arrays where transducers are spatially distributed over a large area and are permanently attached to the structure. For plate-like geometr...
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Acoustoelasticity, or the change in elastic wave speeds with stress, is a well-studied phenomenon for bulk waves. The effect of stress on Lamb waves is not as well understood, although it is clear that anisotropic stresses will produce anisotropy in the Lamb wave dispersion curves. Here the theory of acoustoelastic Lamb wave propagation is developed for isotropic media subjected to a biaxial, h...
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Modeling and experiments are used to investigate Lamb wave propagation in the direction perpendicular to an applied stress. Sensitivity, in terms of changes in velocity, for both symmetrical and anti-symmetrical modes was determined. Codes were developed based on analytical expressions for waves in loaded plates and they were used to give wave dispersion curves. The experimental system used a p...
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ژورنال
عنوان ژورنال: Journal of Nondestructive Evaluation
سال: 2017
ISSN: 0195-9298,1573-4862
DOI: 10.1007/s10921-017-0457-x