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dc.contributor.authorZhou, Yanmin
dc.contributor.authorRobinson, Adam
dc.contributor.authorViney, Christine
dc.contributor.authorFederle, Walter
dc.date.accessioned2015-06-25T14:08:29Z
dc.date.available2015-06-25T14:08:29Z
dc.date.issued2015-09
dc.identifier.citationZhou et al. Journal of Experimental Biology (2015), Vol. 218, pp. 2775-2781. doi: 10.1242/​jeb.124362
dc.identifier.issn0022-0949
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/248723
dc.description.abstractThe flexibility of insect adhesive pads is crucial for their ability to attach on rough surfaces. Here, we used transparent substrates with micropillars to test in adult cockroaches (Nauphoeta cinerea) whether and how the stiffness of smooth adhesive pads changes when shear forces are applied, and whether the insect's age has any influence. We found that during pulls towards the body, the pad's ability to conform to the surface microstructures was improved in comparison to a contact without shear, suggesting that shear forces make the pad more compliant. The mechanism underlying this shear-dependent increase in compliance is still unclear. The effect was not explained by viscoelastic creep, changes in normal pressure, or shear-induced pad rolling, which brings new areas of cuticle into surface contact. Adhesive pads were significantly stiffer in older cockroaches. Stiffness increased most rapidly in cockroaches aged between 2.5 and 4 months. This increase is probably based on wear and repair of the delicate adhesive cuticle. Recent wear (visualised by Methylene Blue staining) was not age dependent, whereas permanent damage (visible as brown scars) accumulated with age, reducing the pads' flexibility.
dc.description.sponsorshipThis study was supported by a studentship from the Cambridge Overseas Trust (to Y.Z.) and research grants from the UK Biotechnology and Biological Sciences Research Council [BB/I008667/1], the Human Frontier Science Programme [RGP0034/2012] and AkzoNobel.
dc.languageEnglish
dc.language.isoen
dc.publisherThe Company of Biologists
dc.subjectbiomechanics
dc.subjectadhesion
dc.subjectinsect cuticle
dc.subjectmaterial properties
dc.subjectageing
dc.subjectwear
dc.titleEffect of shear forces and ageing on the compliance of adhesive pads in adult cockroaches.
dc.typeArticle
dc.description.versionThis is the author accepted manuscript. The final version is available from the Company of Biologists via http://dx.doi.org/10.1242/​jeb.124362
prism.endingPage2781
prism.publicationDate2015
prism.publicationNameJ Exp Biol
prism.startingPage2775
prism.volume218
dc.rioxxterms.funderBBSRC
dc.rioxxterms.projectidBB/I008667/1
dcterms.dateAccepted2015-06-26
rioxxterms.versionofrecord10.1242/jeb.124362
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2015-07-23
dc.contributor.orcidFederle, Walter [0000-0002-6375-3005]
dc.identifier.eissn1477-9145
rioxxterms.typeJournal Article/Review
pubs.funder-project-idBiotechnology and Biological Sciences Research Council (BB/E004156/1)
pubs.funder-project-idBiotechnology and Biological Sciences Research Council (BB/I008667/1)
pubs.funder-project-idHuman Frontier Science Program (HFSP) (RGP0034/2012)
cam.issuedOnline2015-07-23
rioxxterms.freetoread.startdate2016-01-23


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