I have read the paper by Podlozhnyuk et al. (2017) and curious about the contact force calculation.
Referring to Fig. 6, it is shown that different results of adopting different radius method.
And I have written a script to examine the results.
However I have got the results of the volume equivalent sphere. And I could see the big difference from the FEM results if I keep increasing the overlap.
Is there any comment on it?
Or it would be appreciated if you could give your experience on examine it?