Tire Deformation

Technical Challenge

The behavior of elastomeric materials is controlled by the inherent nonlinear viscoelasticity. The nonlinear behavior makes the material strain-rate dependent and lose energy during cyclic loading (hysteresis). These behaviors are important for many applications, for example when determining the footprint of a tire.

PolymerFEM Solution

PolymerFEM has developed a set of material models for elastomers that can handle both the small-strain dynamic and the large-strain nonlinear viscoelastic response. In this case we used the Bergstrom-Boyce (BB) model in PolyUMod® to determine the footprint of an inflated tire that is vertically loaded. 

The BB model can be used to determine the change in contact area, and the stress and strain distributions as a function of time.


More to explore

How to Force Drucker’s Stability in MCalibration

A material model is considered Drucker’s stable if an increase in strain results in an increase in stress. In some cases it can be important to enforce that a material model is Drucker’s stable. This article shows how you can easily achieve this in MCalibration.

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