Abstract：The coiling process of strip steel produces internal stress in the coil due to the action of tension. The magnitude and distribution of the internal stress directly affect the occurrence of defects such as the coil collapse and the convexity after rolling. Considering the difference of the radial and circumferential elastic modulus of the coil and the nonlinearity of the radial elastic modulus,based on the plane axisymmetric elastic theory to deduce the incremental solution equation of the internal stress in the coiling process,introducing the corresponding boundary conditions,the article obtains the equations of radial stress increment and displacement increment for each layer of strip in coil with arbitrary number of coiling layers. The effect of strip thickness and coiling tension and unwinding on the drum pressure and stress distribution in the coil is studied based on the incremental solution method. The results are compared with the experimental results, and the correctness of the proposed method is verified.
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2020, Vol. 55 
