| JKR and Other Adhesion Models Thermodynamic Work of Adhesion  The thermodynamic work of adhesion (surface energy per unit area) is given as
 
|  | (13) |  where A is the Hamaker constant and  is the minimum separation distance. 
 Non-Dimensional Forms  Nondimensional form of the relationship between contact radius and the external 
force and the corresponding moment are described in the section.
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