Journal ArticleDOI
Lamb wave propagation in a plate with step discontinuities
TLDR
In this article, the free-end Lamb wave reflection at a free end as well as the interaction of Lamb waves with upward and downward step discontinuities is solved using an analytical approach.About:
This article is published in Wave Motion.The article was published on 2016-11-01. It has received 41 citations till now. The article focuses on the topics: Lamb waves & Rayleigh wave.read more
Citations
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Journal ArticleDOI
Detection and size estimation of crack in plate based on guided wave propagation
Beata Zima,Rafał Kędra +1 more
TL;DR: In this article, the authors presented results of the comprehensive theoretical and experimental investigation of crack detection in metallic plate using guided wave propagation and developed a novel method which would allow for linear crack size estimation with the use of minimal number of the transducers.
Journal ArticleDOI
Analytical and experimental investigation of the interaction of Lamb waves in a stiffened aluminum plate with a horizontal crack at the root of the stiffener
TL;DR: In this paper, an analytical and experimental analysis based on the physics of the Lamb wave propagation and interaction with the discontinuity is presented. But the analysis is limited to two cases: (a) a plate with a pristine stiffener and (b) aplate with a cracked stiffener.
Journal ArticleDOI
Interaction of Shear and Rayleigh-Lamb Waves with Notches and Voids in Plate Waveguides.
TL;DR: The interaction of different shear- and Rayleigh–Lamb-guided waves in plates with a discontinuity such as a notch or an internal void is investigated to elucidate the relation between the size and shape of the discontinuity and the reflection and transmission coefficients of the scattered field.
Journal ArticleDOI
Core-Skin Disbond Detection in a Composite Sandwich Panel Using Guided Ultrasonic Waves
Christoph Schaal,Ajit Mal +1 more
Abstract: Advanced composite materials are being increasingly used in state-of-the-art aircraft and aerospace structures due to their many desirable properties. However, such composite materials are highly susceptible to developing internal damage. Thus, safe operation of such structures requires a comprehensive program of effective nondestructive inspection and maintenance of their critical load bearing components before the defects grow and become unstable, resulting in failure of the entire structure. Ultrasonic guided wavebased methods have the potential to significantly improve current inspection techniques for large plate-like structural components due to the waves’ large propagation range and sensitivity to defects in their propagation path. The application of guided waves for nondestructive evaluation (NDE) of real structures, however, requires a thorough understanding of the characteristics of guided waves in composite structures in the presence and absence of any defects. In this paper, the interaction of guided waves with a core–skin disbond in a composite sandwich panel is studied using a semi-analytical method, numerical simulations, and laboratory experiments. It is shown that the disbond causes complex mode conversion at its leading and trailing edges. The theoretical findings are verified with laboratory experiments, and the applicability of the proposed pitch–catch setup for NDE of complex composite structures for damage detection is discussed. [DOI: 10.1115/1.4037544]
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Peridynamic modeling of Lamb wave propagation in bimaterial plates
TL;DR: In this paper, the nonlocal bond-based peridynamic (PD) theory was applied to simulate Lamb wave transmission in 2D bimaterial plates and the influence of changing material properties on travelling of the symmetric and antisymmetric Lamb waves were studied in detail.
References
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Journal ArticleDOI
Finite element prediction of wave motion in structural waveguides.
TL;DR: A method is presented by which the wavenumbers for a one-dimensional waveguide can be predicted from a finite element (FE) model, which involves postprocessing a conventional, but low order, FE model, the mass and stiffness matrices of which are typically found using a conventional FE package.
Journal ArticleDOI
Computation of propagative waves in free rail using a finite element technique
TL;DR: In this paper, the dispersion curves of propagative waves in a free rail are computed by using triangular and quadrilateral finite elements of the cross-section of the waveguide.
Journal ArticleDOI
Modelling wave propagation in two-dimensional structures using finite element analysis
Brian R. Mace,Elisabetta Manconi +1 more
TL;DR: In this article, a wave/finite element (WFE) method is described by which the dispersion relations for a two-dimensional structural component can be predicted from a finite element (FE) model.
Journal ArticleDOI
Frequency–wavenumber domain filtering for improved damage visualization
TL;DR: This paper presents a technique for the analysis of full wavefield data in the wavenumber/frequency domain as an effective tool for damage detection, visualization and characterization, and its potentials for the inspection of a variety of structural components.
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