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In this study, the low velocity impact behavior of glass fiber reinforced epoxy (GFRE) composites with the addition of organic intercalated nanoclay and spheroidal powder of polyamide nanoparticles individually and together were investigated experimentally. The weight ratio of the additives was 2% of the epoxy resin-hardener system. Composite laminates were manufactured using prepreg and hot-pressing techniques. Impact tests were carried out at different energy levels from 10 J to 45 J up to complete perforation of the laminates. To evaluate the damage characteristics of the laminates, the results are interpreted in terms of load-time, load-displacement, energy-time, and observation of the physical damages introduced. Addition of nanoparticles increased the peak load (up to 22.6%) and damage resistance (up to 40%) of the GFRE laminates altering damage mechanisms of the composite material from out of plane to in-plane direction at higher impact energy levels.

12th International Conference on Computational Plasticity: Fundamentals and Applications, COMPLAS 2013, 3 September 2013 through 5 September 2013, Barcelona In this study an experimental investigation is performed on the impact response of non-crimp fabric composite plates at room temperature. Chopped strand mat combi is used as reinforcing material and two kinds of matrix; epoxy and polyester, are also used as resin material in the composite plates. All specimens used in experiments are manufactured by vacuum assisted resin infusion method at Atard Defence and Aerospace Advanced Technology Application Research and Development Inc. An instrumented drop weight impact testing machine Instron-Dynatup 9250 HV is used for impact testing. Impact tests are performed under various impact energies ranging from initiation of damage to final perforation. Damage processes of the samples are analyzed from cross-examining load-deflection curves, energy profiling method and damaged specimens.