The Computational Modeling of Ultimate Strength and Buckling in Stiffened Panels Under Shear Loading

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Insinööritieteiden korkeakoulu | Bachelor's thesis
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Date

2025-09-05

Department

Major/Subject

Computational Engineering

Mcode

ENG3082

Degree programme

Aalto Bachelor’s Programme in Science and Technology

Language

en

Pages

27+6

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Abstract

Stiffened panels are widely utilized in aerospace, marine, and civil engineering due to their exceptional weight-to-strength ratios. These panels are commonly subject to shear loads, which result in buckling and ultimate failure of the struc-ture. Thus, this behavior must be accurately modeled to provide predictions of ultimate and buckling loads for engineers. This thesis analyzes the computation-al methods employed by researchers to determine buckling and ultimate loads of stiffened panels. Additionally, it focuses on the influence of material properties and panel structures on the load-bearing capabilities of stiffened panels. The results from studies indicate that finite element methods are capable of captur-ing complex geometries and non-linear material behavior to provide accurate predictions. These methods produce more accurate predictions than semi-analytical and analytical approaches, but at a higher computational cost. Fur-thermore, the results exhibit the significance of optimizing material properties, structure, and geometry in stiffened panel designs. Finally, machine learning and artificial intelligence introduce innovations that capture the accuracy of fi-nite element methods with higher efficiency.

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Supervisor

St-Pierre, Luc

Thesis advisor

Romanoff, Jani

Keywords

stiffened panel, shear loading, finite element method, buckling, ultimate strength, modeling

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https://urn.fi/URN:NBN:fi:aalto-202510077446

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[kand] Insinööritieteiden korkeakoulu / ENG