Accession Number : AD0694068

Title :   AN EXPERIMENTAL STUDY OF NON-LINEAR VISCOELASTICITY.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING

Personal Author(s) : Jorgensen,Jon M.

Report Date : JUN 1969

Pagination or Media Count : 143

Abstract : Styrene butadiene rubber was tested under constant strain-rate loading. The results were compared with stresses predicted by two non-linear viscoelastic constitutive equations - the Lianis Theory and the Bernstein-Kearsley-Zapas Theory. Both theories predicted stresses within 10% of experimental values; the Lianis Theory was generally closer to experimental values. The Lianis Theory was also compared to constant strain-rate loading superposed on a finite, equilibrium step of deformation and to constant strain-rate tests in which the strain rate is changed during the test. The results were comparable to the simple constant strain-rate test results. (Author)

Descriptors :   (*MATERIALS, *VISCOELASTICITY), (*SYNTHETIC RUBBER, ELONGATION), (*STRESSES, MATHEMATICAL PREDICTION), NONLINEAR SYSTEMS, STYRENES, BUTADIENES, THEORY, DEFORMATION, RELAXATION TIME, STRAIN(MECHANICS), LOADS(FORCES), MECHANICAL PROPERTIES, COMPUTER PROGRAMS, EXPERIMENTAL DATA, EQUATIONS, THESES

Subject Categories : Elastomers and Rubber
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE