Effects of Stiffener/Rib Separation on Damage Growth and Residual Strength

Kan, H.P.; Mahler, M.; Northrop Grumman Corporation. Military Aircraft Division

doi:10.21949/1403762

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i

Effects of Stiffener/Rib Separation on Damage Growth and Residual Strength

1996-05-01
By Kan, H.P. ; Mahler, M.

[PDF-651.60 KB]

English

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Details:

Creators:

Kan, H.P. ; Mahler, M.

Kan, H.P. ; Mahler, M. Less -
Corporate Creators:

Northrop Grumman Corporation. Military Aircraft Division
Corporate Contributors:

United States. Federal Aviation Administration. Office of Aviation Research
Subject/TRT Terms:

[+]

Acceptance Tests Airplanes Certification Composite Materials Composite Structures Damage Tolerance Delamination Durability Failure Impact Damage Methodology Stiffness Strength Of Materials Wings (Aircraft)
Publication/ Report Number:

DOT/FAA/AR-95/12
DOI:

https://doi.org/10.21949/1403762
Resource Type:

Tech Report
TRIS Online Accession Number:

00861098
NTL Classification:

NTL-AVIATION-Aviation Safety/Airworthiness
Abstract:

Two existing composite aircraft structures were used to evaluate the effects of skin/stiffener separation on the residual strength of the structures. These structures are basically compression dominated upper wing structures designed to comply with the impact damage tolerance requirements. The severity of impact damage and delaminations were analytically compared with that of skin/stiffener disbond. Critical disbond sizes were determined so the residual strengths of the structures are comparable to those obtained from impact damage tolerance designs. A damage tolerance certification approach based on the results of this study was recommended. The approach is to prevent local buckling in the disbond region under the applied load that governs the damage tolerance design for impact damage and delaminations. This would lead to a critical disbond length for the structure that has the same residual strength capability as in the case of impact damage and delamination. (Document in MS WORD format)
Format:

DOC
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:4624ebb55687d10145ff8b9da3801482a7d6823386dbe937fd1314950acf332c
Download URL:

https://rosap.ntl.bts.gov/view/dot/12890/dot_12890_DS1.pdf
File Type:

9512.doc

doc

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