Journal ArticleDOI
Lamb wave reflection at the free edge of a plate.
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TLDR
The conversion phenomena are examined in detail over a large frequency range and the energy conversion coefficients are obtained by three different ways: theoretically, numerically (finite element method) and experimentally.Abstract:
This study concentrates on the reflection of Lamb waves at the free end of a plate. The conversion phenomena are examined in detail over a large frequency range and the energy conversion coefficients are obtained by three different ways: theoretically, numerically (finite element method) and experimentally. The experimental energy determination is obtained from the measurement of the plate normal displacements, by mean of a laser interferometer. All results are in relatively good agreement and the energy balance between incident and reflected waves is discussed in each case.read more
Citations
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Journal ArticleDOI
Reflection of Lamb waves obliquely incident on the free edge of a plate
TL;DR: The reflection of obliquely incident symmetric and anti-symmetric Lamb wave modes at the edge of a plate is studied and energy reflection coefficients are calculated for the reflected wave modes as a function of frequency and angle of incidence.
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PVDF Multielement Lamb Wave Sensor for Structural Health Monitoring
Baiyang Ren,Cliff J. Lissenden +1 more
TL;DR: An affixed polyvinylidene fluoride (PVDF) multielement sensor is shown to provide mode content information and mode receivability capabilities for structural health monitoring (SHM) of Lamb waves.
Journal ArticleDOI
Scattering of Lamb waves from a discontinuity: An improved analytical approach
TL;DR: In this article, the authors proposed the complex modes expansion with vector projection (CMEP) method to calculate the scattering of straight-crested Lamb wave from geometric discontinuities.
Journal ArticleDOI
An orthogonality relation-based technique for post-processing finite element predictions of waves scattering in solid waveguides
TL;DR: In this article, a general orthogonality relation is used to calculate the reflection and transmission coefficients of a pure Lamb mode incident on a notch-like defect, in either an elastic or a viscoelastic plate.
Journal ArticleDOI
Finite-element modelling of non-destructive material evaluation, an addendum: a bibliography (1997–2003)
TL;DR: In this article, a bibliographical review of finite element methods applied to non-destructive evaluation of materials is given, which is a continuation of the same paper published in Modelling Simul.
References
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A two-dimensional Fourier transform method for the measurement of propagating multimode signals
D. N. Alleyne,Peter Cawley +1 more
TL;DR: In this article, a two-dimensional Fourier transform (2D FFT) was used to measure the amplitudes and velocities of the Lamb waves propagating in a plate, the output of the transform being presented using an isometric projection which gives a three-dimensional view of the wave-number dispersion curves.
Journal ArticleDOI
The Reflection of Guided Waves From Circumferential Notches in Pipes
TL;DR: In this article, the reflection of the L(0, 2), axially symmetric guidea elastic wave from notches in pipes is examined, using laboratory experiments and finite element simulation.
Journal ArticleDOI
A boundary element solution for a mode conversion study on the edge reflection of Lamb waves
Younho Cho,Joseph L. Rose +1 more
TL;DR: In this paper, the authors extended the boundary element method to study the mode conversion phenomena of Lamb waves from a free edge and formulated the elastodynamic interior boundary value problem as a hybrid boundary integral equation in conjunction with the normal mode expansion technique based on the Lamb wave dispersion equation.
Journal ArticleDOI
Reflection of Wave Trains in Semi‐Infinite Plates
TL;DR: In this article, a method for using the well known modes of vibration for the infinite plate as elements of an expansion applicable to semi-infinite plates is given, which is employed to study the reflection of an infinite train of waves from the free edge of an elastic plate.
Journal ArticleDOI
The reflection of a symmetric Rayleigh-Lamb wave at the fixed or free edge of a plate
R. D. Gregory,I. Gladwell +1 more
TL;DR: In this article, a semi-infinite plate of homogeneous isotropic, linearly elastic material is considered and the problem of determining the reflected wave field is solved by the method of projection, a method developed by the authors for solving corresponding problems in elastostatics.
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