Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/95016
Type: Journal article
Title: Analysis of mode conversion and scattering of guided waves at cracks in isotropic beams using a time-domain spectral finite element method
Author: He, S.
Ng, C.
Citation: Electronic Journal of Structural Engineering, 2015; 14(1):20-32
Publisher: EJSE International
Issue Date: 2015
ISSN: 1443-9255
Statement of
Responsibility: 
S. He & C.T. Ng
Abstract: Detecting damages in its early stage, and hence, to ensure the safety and reliability of structures is of vital important. Guided waves have been recognised as one of the promising damage detection tech-niques that are sensitive to small and different types of damages. The understanding of guided wave propaga-tion and scattering phenomena at the damages is one of the fundamental elements to facilitate the develop-ment of this technique for damage characterisation. This paper presents a study of scattering characteristics and mode conversion effects of guided waves at cracks in isotropic beams. An efficient time-domain spectral finite element method using one-dimensional (1D) beam element is developed to solve this problem. The de-veloped model is then used to carry out a series of case studies that consider different crack sizes in the beams. These parametric studies provide a fundamental physical insight into the mode conversion phenomena and scattering characteristics of the guided waves at the cracks.
Keywords: Damage detection; guided waves; spectral finite element; mode conversion; scattering; crack
Rights: Copyright EJSE International
RMID: 0030034020
Grant ID: http://purl.org/au-research/grants/arc/DE130100261
Appears in Collections:Civil and Environmental Engineering publications

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