1] is the viscosity coefficient of the Abel
dashpots and [G.
The SLS model consists of a spring in series with a
dashpot and in parallel with another spring, resulting in three unknown parameters.
Knoop's early apparatus was commercialized in 1940 but a
dashpot was soon added to slow the indenter (5).
In curve B, which is a single
dashpot, stress and strain are related by the Newtonian equation:
The
dashpots are assigned at the exterior nodes of the base row.
Considering obtained yield data from performed compression tests at different strain rates, component-specific curves are driven to measure parameters of viscoplastic
dashpots.
Standard ZWT model is applied by combination usage of springs and
dashpots, representing elastic and viscous factors separately.
Because, in general, a very broad range of relaxation times is spanned by a relaxation process, an appropriately large number of springs and
dashpots, and therefore model parameters are required to accurately model properties over a wide time range.
The resistance of the spring elements is accounted for by the modulus (E) terms, and relaxation time ([tau]) accounts for the viscous response of the
dashpots.
This analogical model is made by the association of springs and
dashpots.
The Burgers model is a theoretical model that uses a combination of springs and
dashpots connected in a series and parallel arrangement to describe the viscoelastic macroscopic behavior of materials (23).
The Burgers model is a combination of the Maxwell (springs and
dashpots in series) and the Voigt (springs and
dashpots in parallel) models connected in series.
