![]() ![]() The results show that composite front bulkhead cannot bear the impact load of front tire fragment at the velocity of 100 m/s, but aluminum alloy front bulkhead can. Besides, dynamic characteristics of the two fuselage structures impacted by tire fragment are simulated and critical damage velocities of each working condition are obtained. Keywords: composite T-joint, hydrodynamic ram, ballistic impact simulation.īy applying finite element software ANSYS/LS-DYNA, finite element models of front bulkhead and main cabin are established, which aims to assess the dynamic response of fuselage structures impacted by tire fragment under bursting mode. Was derived and successfully applied to structural HRAM simulations. A promising macro modelling approachįor an efficient representation of the T-joint failure behaviour in large models #Hydrodynamic ram pressure effect skinWith a hybrid design with metallic, arrow-shaped z-reinforcements between theĬomposite laminates of skin and spar. Improvements and structural integrity under HRAM loads could be obtained While the unreinforced baseline design showed a ratherīrittle behaviour and poor performance, significant residual strength Results and being applied to ballistic impact simulations of a composite fuelfilled In addition to theĮxperimental test campaign, numerical modelling with the explicit finite elementĬode LS-Dyna was conducted with the models being validated against the test Were conducted under quasi-static and high-rate dynamic conditions in order toĪssess potential strain rate effects on the failure behaviour. ![]() The test campaigns covering 0° T-pull and 30° T-bending tests Numerically for application in fuel-filled wing tanks under hydrodynamic ram Three different composite T-joint designs were investigated experimentally and ![]()
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