The Effect of Strain upon the Velocity of Sound and the Velocity of Free Retraction for Natural Rubber.

Abstract

Measurements have been made of the velocity of sound and the velocity of free retraction for stretched strips of vulcanized natural rubber. Both of these velocities are found to increase markedly with increasing strain, in agreement with earlier work. The velocity of sound is shown to be related to the appropriate modulus of elasticity, defined by the slope of the curve relating true stress to tensile strain. Values obtained range from about 50 to about 800 m/s. The effects of prior stretching and of stress relaxation on the velocity of sound are shown to arise from corresponding changes in the modulus of elasticity at a given strain. The velocity of free retraction is shown to be directly related to the velocity of sound in the stretched strip, and to the imposed tensile strain, increasing from zero up to about 100 m/s at high strains. (Author)

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1982
Accession Number
ADA114238

Entities

People

  • Alan Neville Gent
  • P. Marteny

Organizations

  • University of Akron

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • California
  • Chemical Engineering
  • Chemistry
  • Elastic Properties
  • Engineering
  • Light Sources
  • Materials
  • Mechanics
  • Military Research
  • Modulus Of Elasticity
  • Natural Rubber
  • Physics
  • Stress Strain Relations
  • Stresses
  • Tensile Strain
  • United States

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Mechanical Engineering/Mechanics of Materials.
  • Surface Coatings Technology.