Journal ArticleDOI
Wave propagation along transversely periodic structures
TLDR
This paper presents an evolution of the semianalytical finite element method, and gives examples that illustrate new improvements and their importance for studying the propagation of waves along periodic structures of infinite width.Abstract:
The dispersion curves for guided waves have been of constant interest in the last decades, because they constitute the starting point for NDE ultrasonic applications. This paper presents an evolution of the semianalytical finite element method, and gives examples that illustrate new improvements and their importance for studying the propagation of waves along periodic structures of infinite width. Periodic boundary conditions are in fact used to model the infinite periodicity of the geometry in the direction normal to the direction of propagation. This method allows a complete investigation of the dispersion curves and of displacement ∕ stress fields for guided modes in anisotropic and absorbing periodic structures. Among other examples, that of a grooved aluminum plate is theoretically and experimentally investigated, indicating the presence of specific and original guided modes.read more
Citations
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Journal ArticleDOI
Finite element model for waves guided along solid systems of arbitrary section coupled to infinite solid media.
TL;DR: The paper presents the principles of a procedure and then validates and illustrates its use on some examples, and makes use of absorbing regions of material at the exterior bounds of the discretized domain.
Journal ArticleDOI
High-temperature (>500°c) wall thickness monitoring using dry-coupled ultrasonic waveguide transducers
TL;DR: The design of a high-temperature ultrasonic thickness gauge that bypasses problems of depolarization and differential thermal expansion of the different materials within a transducer causes them to fail is described.
Journal ArticleDOI
Guided wave propagation and mode differentiation in hollow cylinders with viscoelastic coatings.
Jing Mu,Joseph L. Rose +1 more
TL;DR: The problem of guided wave propagation in free hollow cylinders with viscoelastic coatings is solved by a semianalytical finite element (SAFE) method andoretical proof of the orthogonality between guided wave modes in a viscoeelastic coated hollow cylinder is provided.
Journal ArticleDOI
Elastic waves guided by a welded joint in a plate
Zheng Fan,Michael J. S. Lowe +1 more
TL;DR: In this paper, a two-dimensional semi-analytical finite element (SAFE) method is applied to provide a modal study of the elastic waves that are guided by the welded joint in a plate.
Journal ArticleDOI
Torsional waves propagation along a waveguide of arbitrary cross section immersed in a perfect fluid.
TL;DR: A semianalytical finite element method is developed to model accurately the propagation velocity and leakage of guided waves along an immersed waveguide with arbitrary noncircular cross section and Experimental results obtained with a rectangular bar in a range of fluids show very good agreement with the theoretical predictions.
References
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Book ChapterDOI
The Dispersion of Surface Waves on Multilayered Media
TL;DR: In this paper, a matrix formalism developed by W. T. Thomson is used to obtain the phase velocity dispersion equations for elastic surface waves of Rayleigh and Love type on multilayered solid media.
Journal ArticleDOI
Transmission of Elastic Waves through a Stratified Solid Medium
TL;DR: In this article, the transmission of a plane elastic wave at oblique incidence through a stratified solid medium consisting of any number of parallel plates of different material and thickness is studied theoretically.
Journal ArticleDOI
Matrix techniques for modeling ultrasonic waves in multilayered media
TL;DR: This paper presents a review of the main developments of the matrix techniques, and their use in response and modal models, with emphasis on ultrasonics applications.
Proceedings ArticleDOI
Modeling wave propagation in damped waveguides of arbitrary cross-section
TL;DR: In this article, a semi-analytical finite element (SAFE) method for modeling wave propagation in waveguides of arbitrary cross-section is proposed, and the dispersive solutions are obtained in terms of phase velocity, group velocity, energy velocity, attenuation and cross-sectional mode shapes.
Journal ArticleDOI
Guided wave dispersion curves for a bar with an arbitrary cross-section, a rod and rail example
TL;DR: Theoretical and experimental issues of acquiring dispersion curves for bars of arbitrary cross-section for guided waves have great potential for being applied to the rapid non-destructive evaluation of large structures such as rails in the railroad industry.