XXX. Verformungskundliches Kolloquium, pp.93-96, 2011
C. Bilik, F.G. Rammerstorfer
Institute of Lightweight Design and Structural
TU Wien, Vienna, Austria
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
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.