Location

Brunswick, ME

Start Date

1-1-1992 12:00 AM

Description

This paper is concerned with investigating the difference in response between a three-ply elastic plate of infinite lateral extent and a similar plate in which the core elastic layer is replaced by a layer of viscoelastic damping material. The transient response of the plate to an impulsive loading is governed by the dispersion equations for infinite trains of harmonic waves propagating under traction free conditions on the plate surfaces (see e.g. Achenbach [1]). These dispersion equations express the wavelength and the damping factor as functions of the frequency and they possess an infinite set of roots, corresponding to different modes of wave motion. In addition to their relevance to the impulsive loading problem, the dispersion curves of the various modes, have a significance for the experimental determination of the properties of laminates by ultrasonic techniques (see e.g. Mal and Bar Cohen [2]).

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

11A

Chapter

Chapter 1: Fundamentals of Standard Techniques

Section

Elastic Wave Propagation

Pages

209-216

DOI

10.1007/978-1-4615-3344-3_26

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Effect of a Damping Layer on Harmonic Wave Motion in a Laminated Plate

Brunswick, ME

This paper is concerned with investigating the difference in response between a three-ply elastic plate of infinite lateral extent and a similar plate in which the core elastic layer is replaced by a layer of viscoelastic damping material. The transient response of the plate to an impulsive loading is governed by the dispersion equations for infinite trains of harmonic waves propagating under traction free conditions on the plate surfaces (see e.g. Achenbach [1]). These dispersion equations express the wavelength and the damping factor as functions of the frequency and they possess an infinite set of roots, corresponding to different modes of wave motion. In addition to their relevance to the impulsive loading problem, the dispersion curves of the various modes, have a significance for the experimental determination of the properties of laminates by ultrasonic techniques (see e.g. Mal and Bar Cohen [2]).