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doi:10.22028/D291-29425
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 http://dx.doi.org/10.22028/D291-29425 |
ISSN: | 0022-5096 1873-4782 |
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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