Derjaguin-Muller-Toporov DMT Model

The attraetive interaction P depends on the profile near the contact perimeter and is typieally represented as a function of the contaet radius a, that is. Paid)- At the point contact (a 0), 

This simplified form is often referred to as the DMT equation, although it is, to be exact, different from the original model. As discussed by Greenwood [16], Maugis showed this form as the limit of the DMT model at the Bradley limit but labeled simply (and somewhat misleadingly) DMT [17]. Greenwood relabeled it the DMT-M model to make a clear distinction. 

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