Figure 3
Numerical dependency of the normalized differential tangential stiffness as a function of the normalized tangential load.
Bars denote a confidence interval of 95% with respect to the average result. Numerical data support the dependency (25) shown in dotted lines. For H = 0.1, the greatest discrepancy is found. This is likely to be related to the fact that for small H, eq. (24) depends on the grid resolution, see [8].
