JKR and Other Adhesion Models
DMT Model
Derjaguin-Muller-Toporov (1975) assumed that the Hertz deformation and developed another model
that included the effect of adhesion force. According to the DMT model, the pull-off force is given as
,
( ) |
(7) |
Contact Radius at Zero Force
The contact radius at zero external force is given as
(Hertz contact radius under adhesion force) |
(8) |
Contact Radius at Separation
The DMT model predicts that the contact radius at the separation is zero.
That is
a = 0 (at separation) |
(9) |
|