The Hertz-Mindlin Nassauer-Kuna model

The Hertz-Mindlin Nassauer-Kuna model is a modification of the Hertz-Mindlin model.

The effective radius is calculated using the Nassuaer-Kuna formula , where V is the overlap volume and d is the penetration depth. The effective radius, RNK is used to determine the equivalent radius, R* which is substituted into the Hertz-Mindlin formula as follows:

All forces are multiplied by the correction factor of 0.62/0.752 specified in Based on: Nassauer, B., 2013 and is defined as:















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