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Dynamic competition of inflation and delamination in the finite deformation of thin membranes

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Abstract

The mechanics of blister delamination and growth plays a major role in a diversity of areas including medicine (skin pathology and mechanics of cell membranes), materials (adhesive and fracture) or soft robotics (actuation and morphing). The behavior of a blister in this context is typically difficult to grasp as it arises from the interplay of two highly nonlinear and time-dependent processes: membrane attachment and decohesion from a substrate. In the present work, we device a simplified approach, based on experimental systems, to predict the deformation path of a blister under various conditions. For this, we consider the problem of a growing blister made of a rubber-like membrane adhered on a rigid substrate, and develop a theoretical and experimental framework to study its stability and growth. We start by constructing a theoretical model of viscoelastic blister growth which we later validate with an experimental setup. We show that blister growth is controlled by the competition between two instabilities: one inherent to the rubber, and a second one pertaining to the adhesion with the substrate. Using these concepts, we show that a “targeted” stable blister shape can be achieved by controlling two parameters: the thickness of the film and the inflation rate.

Graphical abstract: Dynamic competition of inflation and delamination in the finite deformation of thin membranes

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Publication details

The article was received on 23 May 2019, accepted on 12 Jul 2019 and first published on 20 Jul 2019


Article type: Paper
DOI: 10.1039/C9SM00988D
Soft Matter, 2019, Advance Article

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    Dynamic competition of inflation and delamination in the finite deformation of thin membranes

    E. Benet and F. J. Vernerey, Soft Matter, 2019, Advance Article , DOI: 10.1039/C9SM00988D

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