Effect of the size of the sheet with sheared protrusions on the deformed shape after springback

Abstract

In this work, the effect of the size of a sheet with sheared protrusions on the deformed shape was investigated. After the forming process, a sheet with sheared protrusions was bent to result in specific curvatures with respect to the size of the plate due to springback. Springback deformation was assumed to be biaxial bending of an orthotropic plate. Resultant material properties of the plate were determined by using finite element analysis with hexahedral mesh coarsening. An analytic model was used to calculate deformed shapes with respect to the size of the plate. The results calculated with the proposed method showed excellent agreement with the measured results. Increasing the length in the transverse direction caused the curvature in the longitudinal direction to converge to the curvature of uniaxial bending. Increasing the length in the longitudinal direction suppressed bending in the transverse direction.