Structural Analysis and Fatigue Life Prediction of Aircraft Central Fuselage

Abstract

The central fuselage of an aircraft is very important since it connects the majority of the important parts such as the Front fuselage, Rear fuselage, and wings. As a result, any load exerted on these parts will be transferred to the fuselage's core. Hence, a thorough analysis of the centre fuselage is needed in order to achieve high design safety. Fatigue is the product of prolonged cyclic loading on a part that causes it to fail early. The pressure difference among the inside of aircraft and the outside surroundings generated through pressurization. The tremendous pressure within the aircraft wants to advance it, but the stringers and bulkhead prevent it from doing so, this pressure fluctuation occurs frequently, causing the central fuselage to get fatigued. The materials chosen for the analysis using Ansys are aluminium alloy 7050 and structural steel S514, and also the results are validated using Basquin's Equation.