In this paper, firstly the mechanism of complicated volume strain in brittle rock is analyzed by the viscoelastic theory.
It is well known from viscoelastic theory that the deformation of brittle rock is controlled by elastic deformation and viscoelastic deformation.
Obviously, the relationships of log G' ~ log [omega] and log G" ~ log [omega] depart from the quantitative description of log G' [infinity] 2 log [omega] and log G" [infinity] log [omega] given by linear viscoelastic theory
The authors present a unified mechanics and materials perspective on polymers: both the mathematics of viscoelastic theory
and the physical mechanisms behind polymer deformation processes.
Iiioushin, The Approximation Method of Calculating the Constructures by Linear Thermal Viscoelastic Theory
In the linear viscoelastic theory
, creep and stress-relaxation curves are proportional.
This award perpetuates the memory of Melvin Mooney, the developer of viscoelastic theory
, the Mooney viscometer and other testing equipment, by honoring Rubber Division members and affiliate members who have exhibited exceptional technical competence by making significant and repeated contributions to rubber technology.
Based on viscoelastic theory
, a standard uniaxial linear viscoelastic solid model for creep under constant stress [[sigma].
7) obtained a nonlinear viscoelastic material model for medium density polyethylene based on tensile relaxation data using Schapery's nonlinear viscoelastic theory
Thus, there is a need for a nonlinear viscoelastic theory
to effectively characterize the creep of a polymer.
This result disagrees with the linear viscoelastic theory
Comparison of Overstress Theory With Linear Viscoelastic Theory