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  4. Towards viscoplastic constitutive models for Cosserat rods
 
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2015
Konferenzbeitrag
Titel

Towards viscoplastic constitutive models for Cosserat rods

Abstract
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.
Author(s)
Dörlich, Vanessa
Fraunhofer-Institut für Techno- und Wirtschaftsmathematik ITWM
Linn, Joachim
Fraunhofer-Institut für Techno- und Wirtschaftsmathematik ITWM
Scheffer, Tobias
Universität des Saarlandes
Diebels, Stefan
Universität des Saarlandes
Hauptwerk
ECCOMAS Thematic Conference on Multibody Dynamics 2015. Online resource
Konferenz
Thematic Conference on Multibody Dynamics 2015
File(s)
N-372229.pdf (1.38 MB)
Language
Englisch
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ITWM
Tags
  • cosserat rods

  • viscoplasticity

  • multiaxial experiment...

  • flexible structures

  • cables

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