Evaluation of isogrid rib-stiffened and conventional helicopter fuselage panels under discrete damage and complex loading scenarios

Odeh Dababneh; Alex John Pullan

Evaluation of isogrid rib-stiffened and conventional helicopter fuselage panels under discrete damage and complex loading scenarios

Odeh Dababneh
, Alex John Pullan

Kingston University
University of London Air Squadron

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

This study examines how circular and star-shaped damage affects Aluminum-2024-T3 helicopter fuselage panels, focusing on damage shape, size, and location.

Using finite element analysis, conventional stiffened panels are compared with isogrid rib-stiffened ones under combined compression and shear. Isogrid panels show superior performance, with reduced displacements, lower von-Mises stress, higher stiffness, and improved damage resistance, especially against star-shaped damage. They retain higher natural frequencies and stability under damage, while conventional panels lose performance, especially in mode one.

Isogrid panels also achieve higher buckling load factors, maintaining structural integrity despite damage, making them ideal for design optimization despite a 16.7% weight increase.

Original language	English
Title of host publication	Engineering proceedings. The 8th International Conference of Engineering Against Failure
Editors	Spiros Pantelakis, Spyros Diplas
Publisher	Multidisciplinary Digital Publishing Institute (MDPI)
Number of pages	8
Volume	119
Edition	1
Publication status	Published - 5 Dec 2025
Event	8th International Conference of Engineering Against Failure - Kalamata, Greece Duration: 22 Jun 2025 → 25 Jun 2025

Publication series

Name	Engineering Proceedings
Publisher	MDPI
ISSN (Print)	2673-4591

Conference

Conference	8th International Conference of Engineering Against Failure
Country/Territory	Greece
City	Kalamata
Period	22/06/25 → 25/06/25

Keywords

helicopter fuselage panel
isogrid rib-stiffened
discrete damage
frequency analysis
buckling analysis

Access to Document

https://doi.org/10.3390/engproc2025119001Licence: CC BY

Cite this

Dababneh, O., & Pullan, A. J. (2025). Evaluation of isogrid rib-stiffened and conventional helicopter fuselage panels under discrete damage and complex loading scenarios. In S. Pantelakis, & S. Diplas (Eds.), Engineering proceedings. The 8th International Conference of Engineering Against Failure (1 ed., Vol. 119). (Engineering Proceedings). Multidisciplinary Digital Publishing Institute (MDPI). https://doi.org/10.3390/engproc2025119001

Dababneh, Odeh ; Pullan, Alex John. / Evaluation of isogrid rib-stiffened and conventional helicopter fuselage panels under discrete damage and complex loading scenarios. Engineering proceedings. The 8th International Conference of Engineering Against Failure. editor / Spiros Pantelakis ; Spyros Diplas. Vol. 119 1. ed. Multidisciplinary Digital Publishing Institute (MDPI), 2025. (Engineering Proceedings).

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title = "Evaluation of isogrid rib-stiffened and conventional helicopter fuselage panels under discrete damage and complex loading scenarios",

abstract = "This study examines how circular and star-shaped damage affects Aluminum-2024-T3 helicopter fuselage panels, focusing on damage shape, size, and location. Using finite element analysis, conventional stiffened panels are compared with isogrid rib-stiffened ones under combined compression and shear. Isogrid panels show superior performance, with reduced displacements, lower von-Mises stress, higher stiffness, and improved damage resistance, especially against star-shaped damage. They retain higher natural frequencies and stability under damage, while conventional panels lose performance, especially in mode one. Isogrid panels also achieve higher buckling load factors, maintaining structural integrity despite damage, making them ideal for design optimization despite a 16.7\% weight increase.",

keywords = "helicopter fuselage panel, isogrid rib-stiffened, discrete damage, frequency analysis, buckling analysis",

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booktitle = "Engineering proceedings. The 8th International Conference of Engineering Against Failure",

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Dababneh, O & Pullan, AJ 2025, Evaluation of isogrid rib-stiffened and conventional helicopter fuselage panels under discrete damage and complex loading scenarios. in S Pantelakis & S Diplas (eds), Engineering proceedings. The 8th International Conference of Engineering Against Failure. 1 edn, vol. 119, Engineering Proceedings, Multidisciplinary Digital Publishing Institute (MDPI), 8th International Conference of Engineering Against Failure, Kalamata, Greece, 22/06/25. < https://doi.org/10.3390/engproc2025119001>

Evaluation of isogrid rib-stiffened and conventional helicopter fuselage panels under discrete damage and complex loading scenarios. / Dababneh, Odeh; Pullan, Alex John.
Engineering proceedings. The 8th International Conference of Engineering Against Failure. ed. / Spiros Pantelakis; Spyros Diplas. Vol. 119 1. ed. Multidisciplinary Digital Publishing Institute (MDPI), 2025. (Engineering Proceedings).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Pullan, Alex John

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N2 - This study examines how circular and star-shaped damage affects Aluminum-2024-T3 helicopter fuselage panels, focusing on damage shape, size, and location. Using finite element analysis, conventional stiffened panels are compared with isogrid rib-stiffened ones under combined compression and shear. Isogrid panels show superior performance, with reduced displacements, lower von-Mises stress, higher stiffness, and improved damage resistance, especially against star-shaped damage. They retain higher natural frequencies and stability under damage, while conventional panels lose performance, especially in mode one. Isogrid panels also achieve higher buckling load factors, maintaining structural integrity despite damage, making them ideal for design optimization despite a 16.7% weight increase.

AB - This study examines how circular and star-shaped damage affects Aluminum-2024-T3 helicopter fuselage panels, focusing on damage shape, size, and location. Using finite element analysis, conventional stiffened panels are compared with isogrid rib-stiffened ones under combined compression and shear. Isogrid panels show superior performance, with reduced displacements, lower von-Mises stress, higher stiffness, and improved damage resistance, especially against star-shaped damage. They retain higher natural frequencies and stability under damage, while conventional panels lose performance, especially in mode one. Isogrid panels also achieve higher buckling load factors, maintaining structural integrity despite damage, making them ideal for design optimization despite a 16.7% weight increase.

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KW - isogrid rib-stiffened

KW - discrete damage

KW - frequency analysis

KW - buckling analysis

M3 - Conference contribution

VL - 119

T3 - Engineering Proceedings

BT - Engineering proceedings. The 8th International Conference of Engineering Against Failure

A2 - Pantelakis, Spiros

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Dababneh O, Pullan AJ. Evaluation of isogrid rib-stiffened and conventional helicopter fuselage panels under discrete damage and complex loading scenarios. In Pantelakis S, Diplas S, editors, Engineering proceedings. The 8th International Conference of Engineering Against Failure. 1 ed. Vol. 119. Multidisciplinary Digital Publishing Institute (MDPI). 2025. (Engineering Proceedings).

Evaluation of isogrid rib-stiffened and conventional helicopter fuselage panels under discrete damage and complex loading scenarios

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