Contact Deformation Analysis of Elastic–Plastic Asperity on Rough Roll Surface in a Strip Steel Mill
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In this paper, the deformation behaviors of elastic–plastic asperity on rough roll surface in a strip steel mill were simulated by a three-dimensional finite element (FE) model. The asperity characterized a sinusoidal profile and all objects in the FE model were elastic–plastic with linear strain hardening. The deformation behaviors including contact stresses, strains (including elastic and plastic strains), and contact radii of different rolling force densities and different geometrical shapes and sizes were calculated and analyzed. It revealed that the tall-thin type asperity caused larger plastic strain in the asperity itself and larger Von Mises stress in the mating roll subsurface. Long-term repeated effects of large cyclic strain and stress were liable to spark subsurface cracks and increased the risk of fatigue failure of rolls in strip rolling mills.
KeywordsFE method Contact analysis Elastic–plastic deformation Strip rolling mill
The authors would like to acknowledge the financial support provided by the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20120006110015).
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