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