AUTHOR=Lyashenko Iakov A. , Pohrt Roman 

TITLE=Adhesion Between Rigid Indenter and Soft Rubber Layer: Influence of Roughness

JOURNAL=Frontiers in Mechanical Engineering

VOLUME=6

YEAR=2020

URL=https://www.frontiersin.org/journals/mechanical-engineering/articles/10.3389/fmech.2020.00049

DOI=10.3389/fmech.2020.00049

ISSN=2297-3079

ABSTRACT=<p>We report a series of experiments on the indentation of steel indenters into a soft layer of transparent rubber with relatively high adhesion. The roughness properties of the steel indenters are varied by undergoing preparation using sandpaper with different grain sizes. Starting from a smooth surface, additional roughness increases the adhesive strength up to a critical roughness value, after which it significantly decreases. Furthermore, we look at the evolution of the contact area during slow indentation and detachment. It was found that, during indentation, the contact area changes more sharply compared to detachment (pull-off).</p>