Medium wave buckling simulation during strip bending roll straightening process
Analytical calculation,numerical analysis and straightening experiment were used to study and analyze the problem of wave change during roll straightening process of metal strip.Based on the small deflection theory of thin plate,the analytical calculation model of buckling deformation of metal strip was established.The influence coefficient was introduced to analyze the influence of the flat part of metal strip on the buckling area.The critical buckling load of metal strip was solved by the minimum energy principle.The perturbation variational principle was used to solve the post-buckling path and mode.The buckling process of the metal strip was simulated by ABAQUS,and the experiments were carried out by 19-roll straightening machine in the laboratory.The results show that the critical buckling load of the metal strip increases with the increase of thickness,and the post-buckling wave height decreases with the increase of thickness.The critical buckling load of metal strip increases with the increase of material elastic modulus.The critical buckling load of the metal strip decreases with the increase of the half-wave width of the medium wave.
medium wavepost-bucklingperturbation methodanalytical calculation
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