A viscoelastic approach for modeling bending behavior in finite element forming simulation of continuously fiber reinforced composites

By Dominik Dörr, Fabian J. Schirmaier, Frank Henning, Luise Kärger

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Abstract

An approach for modeling rate-dependent bending behavior in FE forming simulation for either a unidirectional
or a woven/bidirectional reinforcement is presented. The applicability of the bending model to
both fiber architectures is guaranteed by introducing either an orthogonal or a non-orthogonal fiber parallel
material frame. The applied constitutive laws are based on a Voigt-Kelvin and a generalized Maxwell
approach. The bending modeling approaches are parameterized according to the characterization of thermoplastic
UD-Tape (PA6-CF), where only the generalized Maxwell approach is capable to describe the
material characteristic for all of the considered bending rates. A numerical study using a hemisphere test
reveals that the Voigt-Kelvin approach and the generalized Maxwell approach lead to similar results for
the prediction of wrinkling behavior. Finally, the approaches for modeling bending behavior are applied
to a more complex generic geometry as an application test with a good agreement between forming simulation
and experimental tests.

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Researchers should cite this work as follows:

  • Dominik Dörr; Fabian J. Schirmaier; Frank Henning; Luise Kärger (2017), "A viscoelastic approach for modeling bending behavior in finite element forming simulation of continuously fiber reinforced composites," https://cdmhub.org/resources/1527.

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