Tire storage modulus

What is storage modulus?

Storage modulus is a measure of viscoelastic materials’ stif ness—it is proportional to the stored energy during loading. Under single low loading and reversible deformation, it is equivalent to Young’s modulus of the material.

What is the ratio of loss modulus to storage modulus?

The ratio of loss modulus to storage modulus is called loss factor, which is a dimensionless parameter that measures energy lost and indicates the mechanical damping or internal friction of viscoelastic material. Figure 2 shows the distribution of the storage modulus and loss factor at cross sections of the tire at dif erent locations.

How are rolling resistance and temperature distribution of 3-D periodic patterned tires predicted?

The rolling resistance (RR) and the temperature distribution of 3-D periodic patterned tire, which are induced by the hysteretic loss of viscoelastic rubber compounds, are numerically predicted using the 3-D full patterned tire model. A 3-D periodic patterned tire model is constructed by copying 1-sector mesh in the circumferential direction.

How to reduce stress generation in a solid tire?

However, stress generation in the solid tire can be minimized by having only two rubber layers with distinct properties (−1 level) when there are circular apertures in the cushion layer of the tire.

Does a tire rubber layer affect von Mises stress?

The DoE results showed that tire rubber layers and applied load have a significant effect on Von Mises stress, vertical deformation, horizontal deformation and tire contact pressure while the circular apertures on the tire only had a significant effect on Von Mises stress.

Can a new rubber compound improve the performance of solid tires?

Rukkur et al. (2014) used a laboratory test drum to investigate the performance improvement of solid tires due to the introduction of a new rubber compound they developed to reduce heat build-up in the tread layer of the solid tire.