Controlled Dispersion of the Extensional Wave in Composite Isotropic and Transversely Isotropic Rods.

Abstract

The dispersion of extensional waves in composite isotropic and transversely isotropic rods is investigated. The equations of motion of an infinitely long, layered rod with a transversely isotropic core and transversely isotropic casing are developed using the three-dimensional equations of elasticity. Simplifications to the equations of motion for axisymmetric modes of wave propagation and for material isotropy are presented. Methodologies for controlling the range of dispersion or the maximum phase velocity of extensional waves in composite rods consisting of an isotropic core and isotropic casing are discussed. A model of the maximum phase velocity of the extensional wave in a rod consisting of an isotropic core and transversely isotropic casing is developed. It is found that the maximum phase velocity of this system can be controlled within two bounding velocities. The frequency spectra of the extensional waves for several cases are developed, and the dispersion characteristics are discussed. (MM)

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Document Details

Document Type
Technical Report
Publication Date
Aug 14, 1995
Accession Number
ADA301833

Entities

People

  • Marilyn J. Berliner

Organizations

  • Naval Undersea Warfare Center

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Axisymmetric
  • Composite Materials
  • Dispersions
  • Elastic Properties
  • Equations
  • Equations Of Motion
  • Frequency
  • Geometry
  • Materials
  • Materials Testing
  • Mechanics
  • Modulus Of Elasticity
  • Numerical Analysis
  • Phase Velocity
  • Shear Modulus
  • Three Dimensional
  • Wave Propagation

Readers

  • Electrical Engineering
  • Mechanical Engineering/Mechanics of Materials.
  • Wave Propagation and Nonlinear Chaotic Dynamics.