ON THE DYNAMIC RESPONSE OF A COMPOSITE FUSELAGE SUB-FLOOR SUPPORT SYSTEM

In this work, the dynamic response, including damage onmset and evolution, of the composite floor subsection of the cargo area of a civil aircraft is investigated by numerical simulations and experimental tests. The analysed structure has been subjected to impacts characterized by different energies, after a preliminary quasi-static mechanical test. Experimental data has been compared to numerical results in order to better understand and characterize the intra-laminar and inter-laminar damage onset and evolution. Preliminary quasi-static and dynamic numerical analyses have been carried out on a single subsection component to set up the numerical model in the ABAQUS FEM environment; then, in a subsequent phase, the entire structure has been numerically analysed focusing on the inter-laminar and intra-laminar damages onset and propagation. The correlation between numerical results and experimental data, with the aid of ultrasonic non destructive inspections output images, has been carried out.