Introduction to Linear and Non-Linear Viscoelasticity
This article covers differences between linear and non-linear viscoelasticity. Most engineers are familiar with linear viscoelasticity, and perhaps also how to use linear viscoelasticity in a FE simulation. But most engineers are not as familiar with non-linear viscoelasticity. In this article I will try to explain some of the practical differences between these two model types. One key take away is that it is as easy to use a non-linear viscoelastic material model (like the Bergstrom-Boyce model) as it is to use a linear viscoelastic model.