Speed of Sound in Four Elastomers

Abstract

Measurements made at 5-7 kHz on four elastomer compounds provide sound speed values as a function of both temperature (5- 40 C) and hydrostatic pressure (atm to 10000 psi). It is found that the sound speed can vary widely in each elastomer compound and that changes in sound speed caused by temperature changes are less predictable than those caused by hydrostatic pressure changes. Compounding of a given type of elastomer (butyl compounds with different ingredients, for example) produces materials with each having its own sound speed-versus- temperature characteristic. Even though the rho-c of the elastomer may match that of water at some combination of temperature and hydrostatic pressure, it does not necessarily do so at all temperatures and pressures.

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Document Details

Document Type
Technical Report
Publication Date
Dec 03, 1971
Accession Number
AD0733978

Entities

People

  • I. D. Groves Jr.
  • J. L. Lastinger

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms

DTIC Thesaurus Topics

  • Acoustic Impedance
  • Butyl Rubber
  • Elastic Properties
  • Elastomers
  • Frequency
  • Hydrostatic Pressure
  • Materials
  • Measurement
  • Mechanics
  • Natural Rubber
  • Neoprene
  • Physical Properties
  • Rubber
  • Shear Modulus
  • Specific Gravity
  • Tensile Strength
  • Transducers

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Oceanography.
  • Polymer Science and Engineering.