High strain rate impact response of infusible neat resins and vartm S2-glass reinforced fabric composites

摘要

This study primarily investigates the high strain rate impact response of Vinyl Ester resin (VE350) system and their composites made with S2-Glass fiber reinforcement using compression Split Hopkinson Pressure Bar (SHPB). Three differentthicknesses of 3.175, 6.35, 12.7 mm were studied at different strain rates. The laminates were fabricated using affordable vacuum assisted resin transfer molding (VARTM). Laminates of thickness 12.7 mm fabricated using three different resin systems(VE350, Si-AN and Epon) were also investigated to study the influence of the resin system at different strain rates. In the case of neat resin samples, the dynamic modulus, which is the slope of rising portion of the stress-strain plot, increases with the increase in the thickness. This is attributed to the higher cross-linking of polymer chains, which is proportional to the thickness. For S2-glass/Vinyl Ester samples the dynamic modulus as well as the peak stress.