Experimentelle und numerische Untersuchungen zu Hochgeschwindigkeitsaufprall mit dynamischer Kraftmessung

Abstract

In this thesis impact experiments are conducted, to characterize a first high-speed gas gun projectile launcher. Tests with carbon composite sandwich shell material demonstrators, for aircraft fuselages are performed with typical projectiles (steel and ice) at impact velocities of up to 250m/s. The specimens are subjected to non-destructive testing following the impact events. First impact tests are conducted with a new gas gun system with three barrels, having calibers of 25, 60 and 200mm, respectively. A novel device, the instrumented impact test rig, which records dynamic forces during an impact, is mounted on the largest caliber barrel. A finite element model of this device is generated and numerical simulations are conducted using steel and rubber projectiles. These projectiles have masses of up to 1.5kg and impact velocities reach 250km/h. The simulations with the numerical model focus on the core element of dynamic force measurements, the Hopkinson bar. The measurement techniques used are based on the propagation of elastic longitudinal tension waves within the rod.