Reference : Numerical Time-Domain Modeling of Lamb Wave Propagation Using Elastodynamic Finite In...
Scientific journals : Article
Engineering, computing & technology : Mechanical engineering
Computational Sciences
Numerical Time-Domain Modeling of Lamb Wave Propagation Using Elastodynamic Finite Integration Technique
Rappel, Hussein mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
Yousefi-Koma, Aghil mailto [Center of Advanced Systems and Technologies (CAST), School of Mechanical Engineering, College of Engineering, University of Tehran]
Jalil, Jamali [Islamic Azad University, Shushtar Branch > Mechanical Engineering]
Ako, Bahari [Iran University of Science and Technology > School of Railway Engineering]
Shock and Vibration
International Conference on Acoustics and Vibration 2012
Yes (verified by ORBilu)
[en] EFIT ; Lamb wave ; Time-Domain modeling ; Group velocity ; Wave propagation
[en] This paper presents a numerical model of lamb wave propagation in a homogenous steel plate using elastodynamic finite integration
technique (EFIT) as well as its validation with analytical results. Lamb wave method is a long range inspection technique which
is considered to have unique future in the field of structural health monitoring. One of the main problems facing the lamb wave
method is how to choose the most appropriate frequency to generate the waves for adequate transmission capable of properly
propagating in the material, interfering with defects/damages, and being received in good conditions. Modern simulation tools
based on numerical methods such as finite integration technique (FIT), finite element method (FEM), and boundary element
method (BEM) may be used for modeling. In this paper, two sets of simulation are performed. In the first set, group velocities of
lamb wave in a steel plate are obtained numerically. Results are then compared with analytical results to validate the simulation. In
the second set, EFIT is employed to study fundamental symmetric mode interaction with a surface braking defect.

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