Transition from Cassie to Wenzel state in patterned soft elastomer   sliding contacts
  In this paper, we presented an experimental and theoretical analysis of the formation of the contact between a smooth elastomer lens and an elastomer substrate micropatterned with hexagonal arrays of cylindrical pillars. We show using a JKR model coupled with a full description of the deformation of the substrate between the pillars that the transition between the top to the full contact is obtain when the normal load is increased above a well predicted threshold. We have also shown that above the onset of full contact, the evolution of the area of full contact was obeying a simple scaling. 
\'Elise Degrandi-Contraires, Christophe Poulard, Fr\'ed\'eric   Restagno, Rapha\"el Weil, Liliane L\'eger
cond-mat.soft physics.flu-dyn