LOW VELOCITY IMPACT ON EPOXY GLASS COMPOSITES MODIFIED WITH RUBBER MICRO-PARTICLES AND SILICA NANO-PARTICLES

摘要

This research investigates the effects of rubber micro-particles and silica nanoparticles on low-velocity impact performance of +/-45° stitched bonded E-glass epoxy composites. The striker impact height was varied until the impact load-time history plots indicated no drop in impact loads due to possible impact damage. The energy level corresponding to this drop height was called the threshold energy level or lower bound. To establish the energy level for the beginning of penetration or the upper bound, the drop height was increased until just before material failure due to penetration. Impact tests were performed at suitable increments between the lower bound and upper bound drop heights. Impact tests were conducted on an instrumented Instron CEAST 9340 drop impact tower following a procedure similar to ASTM D7136.lt was found that the rubber and silica modified specimens experienced an increased resistance to penetration by the striker, distributing impact energy over a greater area than the control specimens.