2-D Springback Analysis for Stretch-Bending Processes Based on Total Strain Theory 950691
A theoretical model is presented for predicting springback of wide sheet metal subjected to 2D-stretch-bending operation. The material is assumed to be normal anisotropic with n-th power hardening law, σ = Fεn. Two types of stretch-bending experiment, bending with simultaneous stretching and stretch-bending followed by consecutive re-stretching, is conducted using AK sheet steel and sheet aluminum alloy A5182-O. The measured values of springback are in good agreement with analytical ones for a wide range of bending radii, stretching forces, and loading conditions. Furthermore, a calculation method for predicting springback configurations of 2D sheet metal parts with arbitrary cross-sections which include both stretch-bending and stretch-bending-unbending deformation is proposed.
Citation: Kuwabara, T., Takahashi, S., Akiyama, K., and Miyashita, Y., "2-D Springback Analysis for Stretch-Bending Processes Based on Total Strain Theory," SAE Technical Paper 950691, 1995, https://doi.org/10.4271/950691. Download Citation