AN EXPERIMENTAL DETERMINATION OF ULTRASONIC WAVE VELOCITIES IN PLASTICS AS FUNCTIONS OF TEMPERATURE

Abstract

A simple and practical apparatus was set up to measure longitudinal ultrasonic wave velocities. The method used to determine velocity is based on measuring the times required for ultrasonic pulses to travel through samples of different lengths. The method is capable of measuring velocities through samples of a few millimeters thickness with no more than 4% error. The velocities of longitudinal waves through several plastics have been determined over a range of temperatures that, in general, extended from room temperature up to 100C. Five of the materials studied were common plastics for which velocitytemperature curves are given. The other plastics investigated were special-purpose materials used in the nose cones of ballistic re-entry vehicles. Velocity data for these materials is given.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1964
Accession Number
AD0608347

Entities

People

  • Ned D. Arnold

Organizations

  • University of New Mexico

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Acoustic Waves
  • Acoustics
  • Air Force
  • Chemistry
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Measurement
  • Measuring Instruments
  • Piezoelectric Crystals
  • Plastics
  • Reinforced Plastics
  • Solid State Physics
  • Ultrasonics
  • Ultrasounds

Fields of Study

  • Physics

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Microwave Engineering.
  • Polymer Science and Engineering.