XXX. Verformungskundliches Kolloquium, pp.93-96, 2011

INSTABILITÄTEN WÄHREND DES WALZENS VON PROFILEN UND IM EINSATZ VON GEWALZTEN PROFILEN

C. Bilik, F.G. Rammerstorfer

Institute of Lightweight Design and Structural Biomechanics,
TU Wien, Vienna, Austria


Abstract - During roll forming of flat metal strips to thin-walled bar stock profiles, instability phenomena in terms of buckling of plate metal sections may occur if an unsuitable design or arrangement of the roll stands is chosen. Simulation models may support in finding a suitable arrangement of each forming step which leads, without occurrence of instabilities, to the desired final product. Roll formed profiles in the case at hand exhibit residual stresses for reasons of deformations emerging during the forming process which influence both stability and consequently the load carrying capacity of bar stock profiles as construction elements in the field. These influences are computationally investigated using the finite element method for providing simulations of profiles with circular and u-shaped cross sections which are exposed to global pressure loads.

(hjb,110302)