Impact Behaviour of Sandwich GFRP-Foam-GFRP Composites

The objective of this study is to investigate the impact behaviors of sandwich structures. These sandwich structures are made of cross-plied E-glass fibre reinforced plastic (GFRP) composite faces with polyurethane foam core. GFRP composites are used to combine the upper face and the lower face through the core in stitched sandwich structures. Three impact conditions are considered, such as the Izod impact, Charpy impact and weight drop impact. The results show that weight drop impact energy is higher than the Izod and Charpy impact energy, where as dynamic fracture toughness of charpy impact energy is more than the izod and weight drop impact energy due to geometry of impactor and specimen.