Ultrasonic Nondestructive Testing of Materials.

Abstract

The method of phase spectroscopy was applied to measure dispersions of longitudinal and transverse waves in graphite-epoxy and boron-epoxy composite materials over a wide frequency range. A method to determine the attenuation from the dispersion based on the Kramers-Kronig relations was developed. To separate the attenuation due to scattering, and that due to viscosity, dispersion and attenuation of waves in a laminated viscoelastic composite material was analyzed using a statistical theory of multiple scattering. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Oct 15, 1979
Accession Number
ADA078370

Entities

People

  • Wolfgang Sachse
  • Yih-hsing Pao

Organizations

  • Cornell University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Composite Materials
  • Crystal Lattices
  • Crystal Structure
  • Doppler Effect
  • Electric Arcs
  • Electromagnetic Wave Propagation
  • Epoxy Composites
  • Frequency
  • Group Velocity
  • Laminates
  • Materials
  • Materials Testing
  • Phase Velocity
  • Secondary Waves
  • Ultrasounds
  • Wave Propagation

Fields of Study

  • Materials science
  • Physics

Readers

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