Article (Scientific journals)
Elasto-capillarity in insect fibrillar adhesion
Gernay, Sophie-Marie; Federle, Walter; Lambert, Pierre et al.
2016In Journal of the Royal Society, Interface, 13 (121)
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Keywords :
wet adhesion; capillary forces; elasto-capillarity; biomechanics
Abstract :
[en] The manipulation of microscopic objects is challenging because of high adhesion forces, which render macroscopic gripping strategies unsuitable. Adhesive footpads of climbing insects could reveal principles relevant for micro-grippers, as they are able to attach and detach rapidly during locomotion. However, the underlying mechanisms are still not fully understood. In this work, we characterize the geometry and contact formation of the adhesive setae of dock beetles (Gastrophysa viridula) by interference reflection microscopy. We compare our experimental results to the model of an elastic beam loaded with capillary forces. Fitting the model to experimental data yielded not only estimates for seta adhesion and compliance in agreement with previous direct measurements, but also previously unknown parameters such as the volume of the fluid meniscus and the bending stiffness of the tip. In addition to confirming the primary role of surface tension for insect adhesion, our investigation reveals marked differences in geometry and compliance between the three main kinds of seta tips in leaf beetles.
Disciplines :
Life sciences: Multidisciplinary, general & others
Engineering, computing & technology: Multidisciplinary, general & others
Author, co-author :
Gernay, Sophie-Marie ;  Université de Liège > Département d'aérospatiale et mécanique > Microfluidique
Federle, Walter;  University of Cambridge > Department of Zoology > Insect Biomechanics Workgroup
Lambert, Pierre;  Université Libre de Bruxelles - ULB > Ecole polytechnique de Bruxelles > BEAMS-µTech-Biomech
Gilet, Tristan  ;  Université de Liège > Département d'aérospatiale et mécanique > Microfluidique
Language :
English
Title :
Elasto-capillarity in insect fibrillar adhesion
Publication date :
August 2016
Journal title :
Journal of the Royal Society, Interface
ISSN :
1742-5689
eISSN :
1742-5662
Publisher :
Royal Society
Volume :
13
Issue :
121
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
IAP 7/38 MicroMAST funded by BELSPO (Belgian Science Office Policy)
FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture [BE]
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