Abstract：
:This article describes the use of the frequency domain finite element (FDFE) technique for guided wave mode selection in inhomogeneous waveguides. Problems with Rayleigh-Lamb and Shear-Horizontal mode excitation in isotropic homogeneous plates are first studied to demonstrate the application of the approach. Then, two specific cases of inhomogeneous waveguides are studied using FDFE. Finally, an example of guided wave mode selection for inspecting disbonds in composites is presented. Identification of sensitive and insensitive modes for defect inspection is demonstrated. As the discretization parameters affect the accuracy of the results obtained from FDFE, effect of spatial discretization and the length of the domain used for the spatial fast Fourier transform are studied. Some recommendations with regard to the choice of the above parameters are provided.
journal_name
Ultrasonicsjournal_title
Ultrasonicsauthors
Chillara VK,Ren B,Lissenden CJdoi
10.1016/j.ultras.2015.12.007subject
Has Abstractpub_date
2016-04-01 00:00:00pages
199-211eissn
0041-624Xissn
1874-9968pii
S0041-624X(15)00313-3journal_volume
67pub_type
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