Ultrasonic Determination of the Elastic Constants of the Stiffness Matrix for Unidirectional Fiberglass Epoxy Composites.

Abstract

2727The elastic constants of a fiberglass epoxy unidirectional composite are determined by measuring the phase velocities of longitudinal and shear stress waves via the through transmission ultrasonic technique. The waves introduced into the composite specimens were generated by piezoceramic transducers. Geometric lengths and the times required to travel those lengths were used to calculate the phase velocities. The model of the transversely isotropic medium was adopted to relate the velocities and elastic constants.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1986
Accession Number
ADA302918

Entities

People

  • Elizabeth R. Marques
  • James H. Williams Jr.

Organizations

  • Massachusetts Institute of Technology

Tags

DTIC Thesaurus Topics

  • Artificial Intelligence
  • Composite Materials
  • Elastic Properties
  • Epoxy Composites
  • Fiberglass
  • Frequency
  • Laminates
  • Materials
  • Materials Testing
  • Measurement
  • Mechanical Properties
  • Phase Velocity
  • Secondary Waves
  • Shear Stresses
  • Stress Waves
  • Stresses
  • Test And Evaluation

Fields of Study

  • Materials science

Readers

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