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Your search keyword '"Lamb waves"' showing total 2 results
2 results on '"Lamb waves"'

1. Detection of defects in thin-walled structures by means of Lamb waves.

Author

Gravenkamp, Hauke, Saputra, Albert A., Song, Chongmin, and Prager, Jens

Subjects
*LAMB waves, *FINITE element method, *FRACTURE mechanics, *STRUCTURAL plates, *STRUCTURAL health monitoring, *NUMERICAL analysis, *FOURIER transforms
Abstract

In this paper the Scaled Boundary Finite Element Method (SBFEM) is applied for the simulation of Lamb waves in cracked plates. This method is highly advantageous to study the interaction of different Lamb wave modes with cracks as the crack is not discretized and no refinement is required around the crack tip. Numerical examples are presented for the reflection of the fundamental symmetric and antisymmetric modes from cracks of different depth. The spatial Fourier transformation is employed to calculate the amplitudes of reflected Lamb wave modes. The results reveal possibilities to obtain details of the crack geometry in non-destructive testing and structural health monitoring applications. [ABSTRACT FROM AUTHOR]

Published
2012
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2. Baseline subtraction technique in the frequency–wavenumber domain for high sensitivity damage detection.

Author

McKeon, Peter, Yaacoubi, Slah, Declercq, Nico F., Ramadan, Salah, and Yaacoubi, Weina K.

Subjects
*WAVENUMBER, *LAMB waves, *STRUCTURAL plates, *FRACTURE mechanics, *FINITE element method, *ULTRASONIC waves
Abstract

Highlights: [•] Mode conversion of Lamb waves can be used to size notch-type defects in plates. [•] Spectral leakage can hide small amplitude modes in the frequency–wavenumber domain. [•] Baseline subtraction technique is applied to 2DFFT to detect low amplitude modes. [•] Lower limits of detection method are tested via the FEM. [Copyright &y& Elsevier]

Published
2014
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