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Keywords: friction
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Journal Articles
J Exp Biol (2020) 223 (17): jeb226514.
Published: 11 September 2020
... in Phasmatodea (Hexapoda: Insecta) . Zoologica   164 , 1 - 94 . Bußhardt , P. , Wolf , H. and Gorb , S. N. ( 2012 ). Adhesive and frictional properties of tarsal attachment pads in two species of stick insects (Phasmatodea) with smooth and nubby euplantulae . Zoology   115 , 135 - 141...
Includes: Supplementary data
Journal Articles
J Exp Biol (2019) 222 (23): jeb209833.
Published: 29 November 2019
...-sensitive friction pads. Different attachment microstructures on the euplantulae reveal an adaptation of smooth euplantulae to smooth surfaces and nubby eupantulae to a broader range of surface roughness. However, how different attachment pads and claws work in concert and how strong the contribution...
Includes: Supplementary data
Journal Articles
J Exp Biol (2019) 222 (3): jeb192187.
Published: 1 February 2019
...Jonas O. Wolff; Chantal Wiegmann; Christian S. Wirkner; Alexander Koehnsen; Stanislav N. Gorb ABSTRACT Prehensile and gripping organs are recurring structures in different organisms that enhance friction by the reinforcement and redirection of normal forces. The relationship between organ structure...
Includes: Supplementary data
Journal Articles
J Exp Biol (2018) 221 (13): jeb179242.
Published: 1 July 2018
... Crataerina pallida (Diptera, Hippoboscidae) can stay attached to its flying host, the common swift, by using a strongly modified tarsal attachment system, which provides exceptionally high attachment forces on various surfaces. Biomechanics Interlocking Friction Adhesion Ecomorphology Parasitism...
Journal Articles
J Exp Biol (2014) 217 (23): 4213–4220.
Published: 1 December 2014
... structures at their legs and a pygopodium at the abdomen tip. Adults have pointed setae on the ventral side of the two proximal tarsomeres and densely arranged spatula-shaped ones on their third tarsomere. In a centrifugal force tester, larvae and adults attained the highest friction forces and safety...
Journal Articles
J Exp Biol (2014) 217 (2): 222–224.
Published: 15 January 2014
...Ellen Wohlfart; Jonas O. Wolff; Eduard Arzt; Stanislav N. Gorb Dynamic attachment is the key to moving safely and fast in a three-dimensional environment. Among lizards, hexapods and arachnids, several lineages have evolved hairy foot pads that can generate strong friction and adhesion on both...
Journal Articles
J Exp Biol (2014) 217 (2): 283–289.
Published: 15 January 2014
... the manuscript, and R.S.F. and R.J.F. drafted and revised the manuscript. Competing interests The authors declare no competing financial interests. 6 6 2013 19 9 2013 © 2014. Published by The Company of Biologists Ltd 2014 Gecko Adhesion Friction Tribology Contact mechanics...
Includes: Supplementary data
Journal Articles
J Exp Biol (2012) 215 (22): 3965–3972.
Published: 15 November 2012
... at an angle of 141.75±19.59 deg (4 measurements from each of 5 frogs). Maximum forces for the uncontaminated pads in this experiment (which for friction forces may not be the maximum forces that the frog can produce) depended on both mass and angle of slip/fall − 285.4±94.5 and 255.3±73.7 mN for friction...
Includes: Multimedia, Supplementary data
Journal Articles
J Exp Biol (2012) 215 (1): 179–184.
Published: 1 January 2012
... that the difference in force reduction on rough substrata depends on the dimensions of terminal contact elements (spatulae). * Author for correspondence ( sgorb@zoologie.uni-kiel.de ) 6 10 2011 © 2012. 2012 attachment adhesion friction biomechanics cuticle microstructure Arthropoda...
Journal Articles
J Exp Biol (2010) 213 (11): 1950–1959.
Published: 1 June 2010
... of these setose pads in underwater attachment for the first time, we measured friction (shear) forces generated by the gill lamellae on solid substrates. Moreover, the influence of a different kind of surface roughness on attachment was investigated. Scanning electron microscopy showed that four different seta...
Journal Articles
J Exp Biol (2009) 212 (13): 2016–2022.
Published: 1 July 2009
...Peter H. Warman; A. Roland Ennos SUMMARY It is generally assumed that fingerprints improve the grip of primates, but the efficiency of their ridging will depend on the type of frictional behaviour the skin exhibits. Ridges would be effective at increasing friction for hard materials...
Journal Articles
J Exp Biol (2007) 210 (20): 3538–3546.
Published: 15 October 2007
...S. N. Patek; J. E. Baio SUMMARY The dynamic interplay between static and sliding friction is fundamental to many animal movements. One interesting example of stick–slip friction is found in the sound-producing apparatus of many spiny lobster species(Palinuridae). The acoustic movements of the spiny...
Includes: Multimedia, Supplementary data
Journal Articles
J Exp Biol (2006) 209 (18): 3569–3579.
Published: 15 September 2006
... the hypothesis that gecko toes peel like tape. The linear relation between adhesion and shear force is consistent with a critical angle of release in live gecko toes and isolated setal arrays, and also with our prior observations of single setae. We introduced a new model,frictional adhesion, for gecko pad...
Journal Articles
J Exp Biol (2004) 207 (17): 2917–2924.
Published: 1 August 2004
... on smooth surfaces at various stages of ontogenesis. Friction (shear) force (FF) of adults and juvenile insects was measured by the use of a computer controlled centrifugal force tester equipped with a fibre optical sensor. Pad area, body size and body mass were determined individually for each experimental...
Journal Articles
J Exp Biol (2004) 207 (1): 67–74.
Published: 1 January 2004
... and frictional forces in Asian Weaver ants ( Oecophylla smaragdina ). When forces are acting parallel to the surface, pads in contact with the surface can slide smoothly. Force per unit pad contact area was strongly dependent on sliding velocity and temperature. Seemingly consistent with the effect of a thin...
Journal Articles
J Exp Biol (2002) 205 (16): 2479–2488.
Published: 15 August 2002
... of the fractured claw material was studied by scanning electron microscopy. The bending stress of the claw was evaluated as 143.4-684.2 MPa, depending on the cross-section model selected. Data from these different approaches led us to propose a model explaining the saturation of friction force with increased...