Accession Number : AD0775285

Title :   Technique for Measuring the Dynamic Young's Modulus and Loss Factor.

Descriptive Note : Final rept.,

Corporate Author : NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD

Personal Author(s) : Castellucci,Gerald R.

Report Date : JAN 1974

Pagination or Media Count : 32

Abstract : As a part of an extensive program for measuring acoustical properties of polymeric materials, equipment has been designed and set up to measure the dynamic Young's modulus of stiff materials with low acoustic dissipation. Both the elastic modulus and the loss factor are obtained. The method described is based on the excitation of longitudinal resonances in a suspended uniform thin rod having free-free end conditions. For samples of actual material, the results must be corrected for the effect of the radial inertia of the bar and the effects of the measurement equipment on the results. The properties of very lossy or limp materials are measured more conveniently by other techniques. (Author-PL)

Descriptors :   *Modulus of elasticity, *Measurement, Elastic properties, Acoustic properties, Dynamics, Plastics, Metals

Subject Categories : Test Facilities, Equipment and Methods
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE