Abstract

Material parameters in an anisotropic plate are determined using two non-destructive measuring techniques: real-rime phase-stepped electronic speckle pattern interferometry and dual-reference-beam pulsed holographic interferometry. The first technique is used to measure the lower modes of vibration of the plate with free-free boundary conditions. Finite element analysis is then used to determine two effective Young's moduli and the in-plane shear modulus. The second technique is used to detect transient bending waves propagating in the plate and acoustic waves propagating in the surrounding air. A double-pulsed laser is used both to generate the waves and to make holographic recordings of the wave fields. The stiffness of the plate is estimated using the measured deformation field and an analytical solution to the plate impact problem.

Published in

Optics and Lasers in Engineering
1996, Volume: 24, number: 5-6, pages: 429-454
Publisher: ELSEVIER SCI LTD

UKÄ Subject classification

Applied Mechanics


Publication identifier

DOI: https://doi.org/10.1016/0143-8166(95)00100-X

Permanent link to this page (URI)

https://res.slu.se/id/publ/52711