Abstract:
The analytical calculation model of local central buckling deformation is established in which the width of non-uniform load, elastic restrained coefficient and average tension are introduced. Based on the lowest energy principle, the buckling critical stress, buckling wavelength, and buckling wave width are obtained by searching the buckling region. Then the relationships among buckling critical conditions, the width of non-uniform load, elastic restrained coefficient and average tension are also obtained. It is found that the average tension is a important factor to produce local central buckling. The analytical method is verified by spline finite element method simulation. The rolling experiment is carried out in test mill, and the local central buckling is obtained. The critical conditions are achieved, which are in good agreement with the analytical results and numerical results. The correctness and engineering value of the analytical method and spline finite method are proved.