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Towards viscoplastic constitutive models for Cosserat rods

: Dörlich, Vanessa; Linn, Joachim; Scheffer, Tobias; Diebels, Stefan

Fulltext urn:nbn:de:0011-n-3722292 (1.3 MByte PDF)
MD5 Fingerprint: d464c3ed7952ee24d23656b239f3b863
Created on: 13.1.2016

Font-Llagunes, J.M. ; International Center for Numerical Methods in Engineering -CIMNE-; European Community on Computational Methods in Applied Science -ECCOMAS-:
ECCOMAS Thematic Conference on Multibody Dynamics 2015. Online resource : Proceedings of the ECCOMAS Thematic Conference on Multibody Dynamics 2015, Barcelona, June 29 - July 2, 2015
Barcelona, 2015
ISBN: 978-84-944244-0-3
Thematic Conference on Multibody Dynamics <2015, Barcelona>
Conference Paper, Electronic Publication
Fraunhofer ITWM ()
cosserat rods; viscoplasticity; multiaxial experiments; flexible structures; cables

Flexible, slender structures like cables, hoses or wires can be described by the geometrically exact Cosserat rod theory. Due to their complex multilayer structure, consisting of various materials, viscoplastic behavior has to be expected for cables under load. Classical experiments like uniaxial tension, torsion or three-point bending already show that the behavior of e.g. electric cables is viscoplastic. A suitable constitutive law for the observed load case is crucial for a realistic simulation of the deformation of a component. Consequently, this contribution aims at a viscoplastic constitutive law formulated in the terms of sectional quantities of Cosserat rods. Since the loading of cables in applications is in most cases not represented by these mostly uniaxial classical experiment s, but rather multiaxial, new experiments for cables have to be designed. They have to illustrate viscoplastic effects, enable access to (viscoplastic) material parameters and account for coupling effects between different deformation modes. This work focuses on the design of such experiments.