title: Measurement of Lamb wave polarization using a one-dimensional scanning laser vibrometer (L).
abstract: A single head scanning laser Doppler vibrometer is used for the estimation of the polarization of the first symmetric (S(0)) and antisymmetric (A(0)) Lamb wave modes. The measurements at two known incidence angles are performed in order to resolve the two components of motion. Filtering in the frequency/wavenumber domain of the response recorded along a scan line separates the contributions from each mode and allows the evaluation of the corresponding elliptical trajectories of particle motion. Comparison between measured and analytically estimated trajectories validates the measurement technique and suggests its application for the development of material characterization and diagnostics tools.
authors.affiliation: Daniel Guggenheim School of Aerospace Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA.
authors.forename: James
authors.initials: J
authors.lastname: Ayers
authors.forename: Nicole
authors.initials: N
authors.lastname: Apetre
authors.forename: Massimo
authors.initials: M
authors.lastname: Ruzzene
authors.forename: Karim
authors.initials: K
authors.lastname: Sabra
mesh_terms: D000535:Aluminum; D003198:Computer Simulation; D004301:Doppler Effect; D055119:Elastic Modulus; D004867:Equipment Design; D008962:Models, Theoretical; D009038:Motion; D009716:Numerical Analysis, Computer-Assisted; D013997:Time Factors; D014159:Transducers; D014465:Ultrasonics / Q000295:instrumentation*; D014732:Vibration
chemical_list: D000535:Aluminum