Prof. Ivan Argatov Institut für Mechanik, Technische Universität Berlin, Berlin, Germany

Asymptotic modelling of load sharing in bioinspired fibrillar adhesives: Cluster of the Kendall-type adhesive microcontacts
When Mar 26, 2018
from 02:00 PM to 03:00 PM
Where LR8
Contact Name
Contact Phone 01865-283446
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In recent years, a significant amount of research attention has been paid to adhesion of biological systems. For the so-called dry adhesive biological systems, like those of gecko lizards, the explanation of the adhesion mechanism was given in the framework of the classical Johnson–Kendall–Roberts (JKR) theory, originally derived for single spherical contacts. These recent biological studies have inspired the future development of fibrillar and patterned surfaces of polymeric materials, which possess superior adhesive properties compared to the adhesion characteristics of the same materials with the smooth adhering surfaces. One of interesting aspects of the adhesion mechanism of fibrillar adhesives is formulated as the contact splitting principle stating that the adhesion force for a given apparent contact area increases as the total contact is split up into ever-finer contact elements, which is true under the simplifying assumption of non-interacting micro-contacts. To date, the majority of analytical models inherently assume that neighbouring pillars deform independently, thereby still utilizing the non-interaction approximation. In the present research, the problem of multiple adhesive contact for a system of interacting micro-contacts is re-examined using the multi-scale asymptotic modelling approach.