Calculation of Pad Load to Suppress Wrinkling in Uniaxial Compression of Steel Sheet

Abstract

To calculate the required pad load in the compression of high-strength steel sheets under the wrinkle disappearance mode, a theoretical model based on the balance among the moment due to the compressive force, the moment due to the pad reaction force, and the bending moment of the steel sheet is examined. In the theoretical model, a sine curve and a trapezoidal curve are employed as wrinkle shapes, and the tangential and conversion coefficients are used as the apparent Young's modulus. Calculation results of the theoretical model are compared with the results simulated by the finite element method (FEM). It is confirmed that the theoretical model with the conversion coefficient and trapezoidal curve is practical. With the theoretical model, the calculation equation of the pad load required to realize the wrinkle disappearance mode is proposed.