JKR and Other Adhesion Models
Maugis-Pollock
While the JKR and the DMT models assume elastic deformation, there are experimental data that suggests, in many cases, plastic deformation occurs. Maugis-Pollock developed
A model that included the plastic deformation effects. Accordingly, the relationship between the contact radius and external force is given as
![](formulas2/image038.gif) |
(10) |
where is hardness and
, |
(11) |
with being the yield strength.
Note that variations of contact radius with particle diameter at equilibrium, that is
in the absence of external force, for elastic and plastic deformation are
different. That is
(elastic),
(plastic) |
(12) |
|