Please use this identifier to cite or link to this item: doi:10.22028/D291-29425
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Title: Numerical study of adhesion enhancement by composite fibrils with soft tip layers
Author(s): Balijepalli, Ram Gopal
Fischer, Sarah C. L.
Hensel, René
McMeeking, Robert M.
Arzt, Eduard
Language: English
Title: Journal of the Mechanics and Physics of Solids
Volume: 99
Startpage: 357
Endpage: 378
Publisher/Platform: Elsevier
Year of Publication: 2017
Publikation type: Journal Article
Abstract: Bio-inspired fibrillar surfaces with reversible adhesion to stiff substrates have been thoroughly investigated over the last decade. In this paper we propose a novel composite fibril consisting of a soft tip layer and stiffer stalk with differently shaped interfaces (flat vs. curved) between them. A tensile stress is applied remotely on the free end of the fibril whose other end adheres to a rigid substrate. The stress distributions and the resulting adhesion of such structures were numerically investigated under plane strain (2D) and axisymmetric (3D) conditions. The stress intensities were evaluated for different combinations of layer thickness and Young’s moduli. The adhesion strength values were found to increase for thinner layers and larger modulus ratio; these trends are also reflected in selected experimental results. The results of this paper provide a new strategy for optimizing adhesion strength of fibrillar surfaces.
DOI of the first publication: 10.1016/j.jmps.2016.11.017
Link to this record: hdl:20.500.11880/28147
ISSN: 0022-5096
Date of registration: 21-Oct-2019
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Materialwissenschaft und Werkstofftechnik
Professorship: NT - Prof. Dr. Eduard Arzt
Collections:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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