JKR and Other Adhesion Models
Pull-Off Force
The JKR model predicts that the force needed to remove the particle (the pull-off force) is given as
![](formulas2/image022.gif) |
(4) |
Contact Radius at Zero Force
The contact radius at zero external force may be obtained by setting P = 0 in Equation (1). That is,
![](formulas2/image024.gif) |
(5) |
Contact Radius at Separation
The contact radius at the separation is obtained by setting
in Equation (1). The corresponding contact radius is given by
![](formulas2/image028.gif) |
(6) |
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