An Analytical Solution to Investigate the Springback in Unsymmetric Al-Steel Wide Laminates

The springback of two-ply Aluminum-Steel laminates is investigated. An accurate elasto-plastic analysis based on deformation theory of plasticity and the von Mises yield criterion is developed and used to predict springback in unsymmetric sheet metal laminates subjected to pure bending. Stress distribution during loading is obtained and the springback phenomenon after unloading is predicted in various conditions. Analytical results show that the springback of unsymmetric sheet metal laminates is strongly affected by the mechanical properties of each layer, layer thickness ratio, total sheet thickness and bent radius.

Keywords:

Sheet Metal Forming , Unsymmetric Laminate , Springback , Pure Bending