Accession Number : AD0782575

Title :   Mechanics of Viscoelastic Composites.

Descriptive Note : Annual technical rept. 1 Mar 67-29 Feb 68,

Corporate Author : AKRON UNIV OHIO

Personal Author(s) : Gent,A. N. ; Hilyard,N. C. ; Meinecke,E. A. ; Picot,P. L.

Report Date : JUL 1968

Pagination or Media Count : 51

Abstract : An apparatus has been developed for the measurement of the dynamic mechanical properties of foamed materials impregnated with viscous fluids over a wide frequency and temperature range. Preliminary results are given for two foams. Measurements of rolling friction on foam-fluid substrates have also been obtained in two ways for a number of low-density foams. They are compared with the predictions of a simple theoretical treatment of rolling friction on viscoelastic substrates. An analysis is given of the distributions of stress and displacement in solid rubber blocks subjected to small compressions between rigid frictional surfaces. Particular consideration is given to local sliding motions in the outer regions of the loaded surfaces, as a possible means of energy dissipation. Preliminary experimental measurements of the amount of sliding are reported. (Author)

Descriptors :   *Composite materials, *Expanded plastics, *Elastomers, *Viscoelasticity, Dynamics, Mechanical properties, Test equipment, Friction, Sliding, Foam rubber, Polyurethane resins, Polyethylene plastics, Stress strain relations, Numerical analysis

Subject Categories : Laminates and Composite Materials
      Plastics
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE