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Contribution on the cold straightening of workpieces
Author(s) -
Fries Volkmar,
Ismar Heinz,
Ripplinger Wolfgang
Publication year - 1994
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.199400935
Subject(s) - shakedown , curvature , isotropy , residual stress , hardening (computing) , plane (geometry) , structural engineering , cold forming , work (physics) , mechanics , materials science , geometry , engineering , mathematics , mechanical engineering , physics , composite material , finite element method , optics , layer (electronics)
First the material model for elastic‐inelastic behaviour is explained against the background of cold straightening of plane workpieces. The change in geometry of the yield surface in the case of very small cyclic deformations and the influence of isotropic and kinematical work hardening are taken into account. Then case studies on numerical shakedown simulations and on the limits of cold straightening of plane workpieces follow using two material models. Finally the attainable permanent curvature is shown as a function of load and of the number of cycles. Residual stresses and the spring‐back resilience involved are taken into account.