EAN: 9783658301545

TEMPERATURE-DEPENDENT DEFORMATION AND FRACTURE ...

David Degenhardt develops an elasto-viscoplastic material model in order to predict the
temperature and strain rate-dependent deformation and fracture behavior of thermoplastic
polymers. The model bases on three supporting ambient temperatures  where a thermoplastic
polymer has been characterized profoundly at the stress states 1) uni-axial tension and
compression  2) bi-axial tension and 3) shear. The core of the material model builds a
pressure-dependent yield function with a non-associated flow rule. Further  it contains an
analytical hardening law and a strain rate-dependent fracture criterion. The model is validated
with components subjected to impact loading at different ambient temperatures. The comparison
of the simulation and the experiments shows that stiffness  hardening  fractures strain as well
as thicknesses can be well captured. About the Author: David Degenhardt is a calculation
engineer in the chassis development department of a German automobile manufacturer and earned
his doctorate while working at the Technische Universität Carolo-Wilhelmina zu Braunschweig 
Germany.

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