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Modellierung und Simulation von extrudierten faserverstärkten Kunststoffen für dynamische Belastungen

Modelling and simulation of extrude fibre reinforced plastic materials for dynamic loading
: Krivachy, R.; Weyer, S.; Huberth, F.; Thoma, K.

VDI-Gesellschaft Fahrzeug- und Verkehrstechnik:
Berechnung und Simulation im Fahrzeugbau. Vol.2 : Tagung Würzburg, 27. und 28. September 2006
Düsseldorf: VDI-Verlag, 2006 (VDI-Berichte 1967)
ISBN: 3-18-091967-1
Tagung Berechnung und Simulation im Fahrzeugbau <2006, Würzburg>
Fraunhofer EMI ()

As reasons of costs for the crash application of short fibre reinforced polymers for the development is an early covering of the functionality necessary by the numerical simulation. For that purpose an experimental determination of the correct mechanical data and a numerical material model describing the real material are essentially. In this work the mechanical data of a short glass fibre reinforced polymer are determined experimentally by different strain rates and in various directions under compression, shear and tension. On the basis of this data a new orthotropic-linear elastic and both orthotropic and strain rate dependent plastic material model is developed. It considers the dependency of the mechanical material behav iour according to the hydrostatic pressure in the plastic hardening and the failure which depends on loading direction, strain rate and a dimensionless hydrostatic pressure-deviatoric stress ratio. The characteristic data and the material model are validated by dynamic impact on a real structure. At the end different possibilities for the further development are shown.