The study of behavior of epoxy matrix composites reinforced Glass fiber against impact loads with low energy

R.Karimdadashi, F.Azimpour Shishevan

The study of composites Impact behavior is of high importance, Due to high sensitivity of these types of composites against impact loads. In this research the reaction of carbon fiber reinforced polymer (CFRP) composites against impact loads with different energy values has been examined. Therefore, using vacuum assisted resin transfer molding. (VARTM) the desired composites manufactured in 700*700 mm dimensions and were cut in accordance with ASTM D7136 standard using water jets. The cut samples were impact loads at different energy levels. The test results were illustrated contact force-time curves as energy-time and velocity-time curves for different energy levels. In this study, Profile energy method was used in order to obtain penetration and perforation threshold energy. Finally key parameters of low energy impact such as maximum absorbed energy, maximum speed, and test duration time were compared for different energy levels. According to results the penetration threshold energy and perforation threshold energy values of carbon fiber reinforced polymer (CFRP) composites are 60 and 80 joules respectively. According to the results by increasing the energy level to penetration threshold point the amount of absorbed energy also increased and reached its maximum level. After reaching to this point the absorbed energy is reduced with increasing impact energy.