Surface and Interface Waves in a Sandwich Plate with Interface Soft Layers

Abstract

Dispersion of guided waves in a fiber-reinforced laminated plate with or without soft interface layers between the laminae was studied using an exact method of solution and an approximate stiffness method. It is shown that the approximate numerical method provides a solution that agrees very well with the exact solution. The advantage of the approximate method is that it is easily used for any number of laminae with arbitrary properties. The results for a laminated plate with soft interface layers show significant lowering of cut-off frequencies and phase velocities. Velocity of surface acoustic waves is found to decrease with increasing interface layer thickness. Keywords: Fiber reinforced laminates; Wave propagation; Periodic anisotropic layers.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1987
Accession Number
ADA202096

Entities

People

  • A. H. Shah
  • R. L. Bratton
  • S. K. Datta
  • T. Chakraborty

Organizations

  • University of Colorado Boulder

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Acoustic Waves
  • Civil Engineering
  • Dispersion Relations
  • Dispersions
  • Displacement
  • Engineering
  • Equations
  • Frequency
  • Mechanical Engineering
  • Phase Velocity
  • Rayleigh Waves
  • Surface Acoustic Waves
  • Surface Waves
  • Thickness
  • Universities
  • Wave Propagation
  • Waves

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Fluid Dynamics.
  • Reinforced Composite Materials