NUMERICAL SIMULATION OF LOW VELOCITY IMPACT BEHAVIOR APPLIED ON E/GLASS EPOXY LAMINATES

In order to gain weight in aerospace vehicles, the tendency to materials with high specific strength has increased. As a result, composite materials quickly took its place in aviation industry and have replaced metals at most points. Studies on impact tests on these composites have gained importance. The time required and the cost to be incurred for the experiments to be performed increase exponentially depending on the number of parameters selected for the experiments. Money and time are saved by performing numerical analysis. In this study, a low velocity impact test was simulated on E-Glass/Epoxy laminates with 6 mm thickness and 50x100 mm dimensions placed in [0, 90, 0, 90, 0, 90] orientation with LS-DYNA software. Impact was applied on the laminates at 2.0, 2.5 and 3.0 m/s velocities with a 12 mm diameter and 30 kg impactor. As a result of the low-speed impact simulation, force-time, acceleration-time, velocity-time and energy-time changes were obtained. These changes were compared among themselves, and the impact behavior of the composite plate was revealed.