Tailoring static strength performance of metallic stiffened panels by selective local sub-stiffening

Adrian Murphy*, Damian Quinn, Paul Mawhinney, Mustafa Özakça, Sjoerd Van Der Veen

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

22 Citations (Scopus)

Abstract

Today's high-strength and damage tolerant materials allow for significant increases in aluminum working and limit stresses. To fully exploit material improvements as weight savings on aircraft primary structures, it is desirable to enhance the buckling stability of stiffened panels. The work presented in this paper proposes that with the introduction of selective local sub-stiffening, local bucking and panel collapse behavior may be effectively tailored without increased material volume. This would enable greater panel working stresses, translating increases in strength characteristics of new materials into appropriate structural weight savings. Additionally, considering the issues surrounding the damage tolerance of integrally stiffened panels, local sub-stiffeners may be designed to act as integrated crack retarders, improving the damage tolerance characteristics of the structure. This paper presents the experimental and computational design, analysis and optimization work undertaken in assessing and validating the use of selective local sub-stiffening. The experimental work has demonstrated potential combined performance gains for both local plate buckling and panel post-buckling collapse of the order of 10% and 12% respectively. The analysis work undertaken has enabled the development of simple design guidelines for sub-stiffening and potential analysis and optimization techniques for the combined panel configuration and local sub-stiffener design.

Original languageEnglish
Title of host publicationCollection of Technical Papers - 47th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Subtitle of host publication14th AIAA/ASME/AHS Adaptive Structures Conference, 8th AIAA Non-deterministic App
Pages4339-4354
Number of pages16
Publication statusPublished - 2006
Event47th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference - Newport, RI, United States
Duration: 01 May 200604 May 2006

Publication series

NameCollection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Volume6
ISSN (Print)0273-4508

Conference

Conference47th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Country/TerritoryUnited States
CityNewport, RI
Period01/05/200604/05/2006

ASJC Scopus subject areas

  • Architecture
  • General Materials Science
  • Aerospace Engineering
  • Mechanics of Materials
  • Mechanical Engineering

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