Modeling the Elastic Behavior of a Rubber Layer between Two Rigid Spheres

1 Modeling the Elastic Behavior of a Rubber Layer between Two Rigid Spheres 

When a compressive force F provokes a small displacement Ax of one sphere toward the other, there is a compression stiffness which consists of two parts  

Gent and Hwang write a different equation for the same problem  

Extracting data for nonlinear regression xl = stackCData o, Data ) x2 = stack(Data, Data ) x = stack(xl,x2) 

With log scales, data exhibit an inverse dependence so that one can consider a much simpler approximate model  

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