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MM: Fachverband Metall- und Materialphysik
MM 64: Mechanical Properties: Plasticity, fracture, fatigue, wear - II
MM 64.6: Vortrag
Donnerstag, 19. März 2020, 18:45–19:00, IFW B
Mechanical property gradients of spider attachment hairs — •Silja Flenner1, Clemens Schaber2, Imke Greving1, Igor Krasnov1, Manfred Burghammer3, Martin Rosenthal3, Stanislav Gorb2, and Martin Müller1 — 1Helmholtz-Zentrum Geesthacht, Germany — 2Institute of Zoology, Kiel University, Germany — 3ESRF, Grenoble, France
The hairy attachment system of spiders enables these animals to walk upside-down on rough and smooth surfaces and support a multiple of the body weight without the use of glue. These outstanding biological structures comprise of pads including thousands of specially designed hairs that are made of composite materials consisting of proteins and reinforcing chitin fibres.
The technique of high spatial resolution mapping based on scanning X-ray nanobeam diffraction and small-angle scattering was used to study the hairy attachment system of spiders. Each point of a map represents a structural parameter such as orientation or scattered intensity extracted from a diffraction pattern. Additional nanotomography measurements allows to correlate the structural parameters with 3D data. These techniques were combined with an in situ attachment/detachment procedure. The goal of our study is to gain an in-depth understanding of the structures and mechanical properties of single hairs during the attachment and detachment process to a surface.