Reference : Fundamental asymmetric lamb wave ( a0 ) interaction with rectangular notch using elas...
Scientific congresses, symposiums and conference proceedings : Unpublished conference
Engineering, computing & technology : Mechanical engineering
Computational Sciences
Fundamental asymmetric lamb wave ( a0 ) interaction with rectangular notch using elastodynamic finite integration technique (EFIT)
Rappel, Hussein mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
Yousefi-Koma, Aghli [Center of Advanced Systems and Technologies (CAST) School of Mechanical Engineering, College of Engineering, University of Tehran]
21st Annual International Conference on Mechanical Engineering-ISME 2013
7-5-2013 to 9-5-2013
[en] EFIT ; Lamb waves ; Wave scattering ; Defect sizing
[en] Fundamental asymmetric lamb wave’s interactions with rectangular notches in a steel plate are investigated in this paper. Elastodynamic finite integration technique previously mainly used to study wave propagation in elastic media is adopted to study lamb wave interaction with defects. Simulation examples are presented to illustrate the reflection and transmission coefficients’ variations with defect’s height, for both symmetric and asymmetric modes. Results show as the depth of notch increases reflection coefficients for both symmetric mode and asymmetric mode increase. However, when the depth of notch increases transmission coefficient for asymmetric mode decreases which means the main part of transmitted energy is carried by symmetric mode generated when the fundamental asymmetric mode interacts with defect. This simulation could be a valuable tool for the research of lamb wave’s applications in nondestructive testing (NDT) field, as the problem of lamb wave interaction with discontinuities can be used to study defect sizing problem.

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