Absolute Single-Mode Lamb Wave Generation by Laser in a Thin Plate

Seung Seok Lee; Sang Whoe Dho

doi:10.4028/www.scientific.net/KEM.321-323.108

Paper Titles

An Optical Method for the Detection of In-Plane Motion of Acoustic Waves Propagating in Solids
p.91

Quantitative Vibration Amplitude Measurement Using Stroboscopic Phase Shifting ESPI
p.95

Surface Roughness Measurement by Using Interferometer and Active Interferometer Stabilization
p.99

Suppressing Technique of the Antisymmetric Mode by the Superposition of Lamb Waves Generated by Two Laser Beams in a Thin Plate
p.103

Absolute Single-Mode Lamb Wave Generation by Laser in a Thin Plate
p.108

Influence of Shearing Amount on Detecting Crack-Shaped Internal Defect by Shearography
p.112

Out-of-Plane Micro-ESPI System for Measurement of Mechanical Properties of Film Materials
p.116

Residual Stress Evaluation of Thin Film Using Strip Bending Test
p.121

Gas Electron Multipliers for Potential Applications to Digital Radiography
p.125

HomeKey Engineering MaterialsKey Engineering Materials Vols. 321-323Absolute Single-Mode Lamb Wave Generation by Laser...

Absolute Single-Mode Lamb Wave Generation by Laser in a Thin Plate

Abstract:

We present a laser-ultrasonic technique to generate the lowest symmetric ( ) Lamb wave in a thin plate. Using this special technique, in which two symmetric laser beams quasi-simultaneously hit at the same point on both sides of the plate, we absolutely suppress anti-symmetric Lamb wave modes. This technique is applicable to any situation that requires symmetric Lamb wave mode operation and does not need additional contacts or special equipments.