Appraisal of an Aircraft Window Cutout Stiffener Frame Work

Abstract

Today’s aircraft industries are struggling to overcome the challenge of increasing weight, high-efficiency performance and better structural stability and also a longer life at a reduced cost. Military and commercial aircraft are critical structures and their main assembly is based upon stiffeners and joints.  Herein, the geometry consists of two types of stiffeners, ‘L’ and ‘I’ stiffener, made up of Al. The load acting on the geometry is the result of fuselage cabin pressurization. The virtual modeling of the geometry is done in CATIA V5 and the structural analysis is done in ANSYS. The analysis is done for the prediction of stress values (hoop stress), strain, and the deformation. It is observed that the window cutout fails due to the hoop stress acting on it.