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Fung  first proposed the QLV model which is frequently used to study the behavior of soft biological tissues.
Recently, Slesarenko and Rudykh  demonstrated QLV model by combining Yeoh strain energy density function and Neo Hooken strain energy density function to study the behavior of a soft rubber-like digital materials used in Polyjet multimaterial 3D printing.
In this study, we employed a similar hyper-viscoelastic approach using QLV model with Yeoh strain energy density function to model the behavior of our chosen material under uniaxial tension.
The Cauchy stress component for QLV model with Yeoh strain energy density function can be represented as
Stress relaxation function D(t) defines the influence of current stress state in QLV model, which is represented here by the Prony series as
Figure 6a-e exhibits the fitting results of the QLV model with Yeoh strain energy density function (Eq.
QLV model combining hyperelastic and viscoelastic phenomena has been used to capture the rate-dependent nonlinear behavior of the material.
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