Delamination behaviour of high strength vibration damping sheet in V-bending test

Abstract

High strength vibration damping sheet (VDS) consists of two high strength steel sheets and a viscoelastic polymer core with high vibrational damping characteristics. In this study, high strength VDSs with were fabricated with dual phase (DP) 590 steel sheets with 0.7mm of thickness as outer skins and polymer core with very thin thickness. To investigate the effect of different characteristics of the polymer core on delamination behaviour during press bending operation, three types of polymer cores were considered, which are polyethylene, epoxy and acrylic based adhesives and the V-bending tests were performed using the manufactured VDS. In addition, finite element analysis (FEA) was carried out to analyze the influence of the normal/shear directional characteristics of the polymer core on delamination behaviour in the V-bending test. As a result, it could be shown that different delamination behaviours were caused by the three types of the polymer core having different normal/shear directional characteristics.