Klevin-Voigt model

The Klevin-Voigt model (Thomson 1875) addresses this issue by using a parallel connection of a spring and a dashpot. The boundary condition for solving the corresponding differential equation is that spring and dashpot at all times share the same level of strain ... 

Compared to the previously discussed Maxwell model and actual experimental data, the advantage of the Klevin-Voigt model is that the strain exponentially approaches an ultimate strain limit without any discontinuities. Steady state long-term creep and initial elastic strain, however, are not represented in the overall strain response according to the Klevin-Voigt model. 

Schematic creep response to a stress step function for viscoeiastic materiais according to the Klevin-Voigt model...

Since the Klevin—Voigt model consists of a parallel coimection of spring and dashpot, the initial level of stress depends on the viscosity 7/ assigned to the dashpot and the strain rate when applying initial strain at t = 0. 

The combination of both the Klevin-Voigt and the Maxwell model in the Burgers model (Burgers 1935) leads to an even more realistic approach. The solution of the corresponding... 

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