Exploring Geometric Nonlinearity Effects on Stiffness in Aerospace Structures

Abstract

This study investigates the phenomenon of stiffness enhancement in structures used in aerospace vehicle components subjected to geometric nonlinearity. Geometric nonlinearity occurs when the deformation of a structure results in significant changes to its geometry, leading to alterations in stiffness. Understanding this behavior is crucial for the design and analysis of structures in various aerospace engineering applications. Through numerical simulations, this study investigated the mechanisms behind stiffness enhancement by analyzing its natural frequency and its implications on structural performance. Ultimately, an increase in stiffness and, consequently, in the natural frequency of internally pressurized structures was observed.