[en] The feet of many insects are covered with dense arrays of hair-like structures called setae. Liquid capillary bridges at the tip of these micrometric structures are responsible for the controlled adhesion of the insect on a large variety of substrates. The resulting adhesion force can exceed several times the body weight of the insect.
The high aspect-ratio of setae suggests that flexibility is a key ingredient in this capillary-based adhesion mechanism. There is indeed a strong coupling between their elastic deformation and the shape of the liquid meniscus. In this experimental work, we observe and quantify the local deflection of dock beetle seta tips under perpendicular loading using interference microscopy. Our results are then interpreted in the light of an analytic model of elastocapillarity.
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 :
Elastocapilllarity in insect adhesion: the case of beetle adhesive hairs
Publication date :
November 2014
Event name :
American Physical Society Division of Fluid Dynamics 67th Annual Meeting
Event organizer :
Stanford University University of California Berkeley
Event place :
San-Fransisco, United States - California
Event date :
23 to 25 November 2014
Audience :
International
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
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