Double Peeling Mechanism Inspired by Biological Adhesive Systems: An Experimental Study

Abstract

In this study, we have performed, for the first time, a detailed experimental test of the double peeling configuration, including the role of pre-strain and different initial peeling angles. Double peeling systems consist of two adhesive tapes in contact with a substrate and are loaded at a common hinge. Such systems are widely observed in the hairy attachment pads of insects, arachnids, and reptiles. It was previously shown that the antagonistic work of such opposing tape-like contacts lead to enhanced, stable, and robust attachment, if compared to the single peeling configuration. The obtained results are in very good agreement with recent theoretical models and may help explaining the functional mechanisms of biological attachment systems.