Development of an efficient methodology and tool to determine stress intensity correction factors for complex aircraft structures

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TypeArticle
Proceedings titleICAF 2011 Structural Integrity: Influence of Efficiency and Green Imperatives - Proceedings of the 26th Symposium of the International Committee on Aeronautical Fatigue
Conference26th Symposium of the International Committee on Aeronautical Fatigue: Structural Integrity: Influence of Efficiency and Green Imperatives, ICAF 2011, 1 June 2011 through 3 June 2011, Montreal, QC
ISBN9789400716636
Pages335345; # of pages: 11
SubjectAdjacent structures; Aircraft structure; Complex structure; Correction factors; Critical location; Damage tolerance analysis; Finite element models; Irregular geometries; Load transfer; Stress intensity; Aerodynamics; Airframes; Fits and tolerances; Stress intensity factors; Structural integrity; Aircraft manufacture
AbstractDamage tolerance analysis (DTA) of complex aircraft structures requires stress intensity correction factor (β-factor) solutions that cannot be accurately or practically determined with handbook solutions. Typically, these β-factors can be related to the load transfer to adjacent structures and to irregular geometries. A methodology based on ratios between stress intensity factors obtained from StressCheck finite element models is proposed to efficiently determine such factors, which can then be compounded with handbook solutions. Three CC-130 fatigue critical location examples are presented, showing that the results from the proposed methodology are in good agreement with those of other approaches and that the studied β-factors have an important impact on the total compounded stress intensity factor. Various approaches for calculating the β-factors for the complex structures are investigated. Finally, an automated parametric tool, which is able to efficiently generate special factors for typical aircraft critical locations, is presented.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); Aerospace (AERO-AERO)
Peer reviewedYes
NPARC number21271274
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Record identifier74fd2075-8e7a-44c1-9d40-7955e43834d7
Record created2014-03-24
Record modified2016-05-09
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