Authors : Amirreza Pahlevanpour and Mohsen Nalaee
Abstract: There are different methods for simulating propagation of Lamb waves and also their collision and interaction with discontinues and part boundaries. One of these methods is the finite elements method which includes implicit and explicit approaches. In this research, at first, two methods for simulating the Lamb wave propagation were investigated and compared. Then dispersion curves for an aluminum sheet were extracted for symmetric and asymmetric displacements in a node. Subsequently, the related displacement was imposed on the groups of nodes in order to model real state. The main focus of this research is on extracting the dispersion curve thus, only one mode was stimulated which can be entirely symmetric or asymmetric. Comparing the results with analytical solution shows that error is negligible in one node stimulation while 10% error would be occurred in widespread stimulation.
Amirreza Pahlevanpour and Mohsen Nalaee, 2016. Simulation of Lamb Waves Propagation and Dispersion Curve Extraction in Plate. Journal of Engineering and Applied Sciences, 11: 851-861.