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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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Purdue University