Fatigue modeling for aircraft structures containing natural exfoliation corrosion

Download
  1. Get@NRC: Fatigue modeling for aircraft structures containing natural exfoliation corrosion (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1016/j.ijfatigue.2006.07.003
AuthorSearch for: ; Search for: ; Search for:
TypeArticle
Journal titleInternational Journal of Fatigue
ISSN0142-1123
Volume29
Issue4
Pages677686; # of pages: 10
SubjectAircraft; Aluminum alloys; Computer simulation; Corrosion; Fractography; Nondestructive examination; Exfoliation corrosion; Life prediction; Prior corrosion and fatigue; Fatigue of materials
AbstractThis paper presents the results of testing and modeling studies on the remaining fatigue life of aircraft wing skins containing natural exfoliation corrosion. Dogbone specimens were manufactured from 7075-T6511 upper wing panels containing natural exfoliation. The maximum depth of the exfoliation damage was determined by an ultrasonic non-destructive inspection (NDI). Fatigue tests were carried out under fully reversed constant amplitude loading (R = -1.0), and fractographic analyses were performed to examine the cracking mechanisms in the exfoliation region. Based on the test findings, a simplified fatigue model was developed to estimate the remaining fatigue life of the corroded specimens. In this model, the exfoliation damage was assumed as a surface crack with a depth that was presumably available from an NDI or grindout database. The comparison indicates that the simplified model gave a good estimation for the remaining fatigue life of the naturally exfoliated specimens.
Publication date
LanguageEnglish
AffiliationNRC Institute for Aerospace Research; National Research Council Canada
Peer reviewedYes
NPARC number21275956
Export citationExport as RIS
Report a correctionReport a correction
Record identifier0103d838-bae4-4f19-9e0a-33ae2be829a2
Record created2015-08-21
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)
Date modified: