Numerical Simulation of Impact Velocity on CFRP Aircraft Skin with Hat Shaped Stringer

Abstract

As a modern aircraft is made up of at least 50 percent of composite parts, the various attempts are tried to understand more about the behaviour of composites under the loads. The modern aircraft built of laminated composite can bear tension, compression, shear, combination of these loads and impact load. Among these loads, the impact load causes the severe damage and therefore, the impact on carbon fibre-reinforced plastic (CFRP) hat-stiffened composite panel that is used for high velocity aircraft structure was investigated. The dynamic behaviour of it was keenly monitored for two different velocities 150 as well as 250 m/s that are closer to cruise velocity of LEARJET 70 using spherical impactor. Post-processing results from LS dyna software was reasoned out by seeing the notable changes in the distribution of displacement, contact force and delamination zone were extracted.