Neutron diffraction measurements of residual stresses around a crack tip developed under variable-amplitude fatigue loadings

Download
  1. (PDF, 967 KB)
  2. Get@NRC: Neutron diffraction measurements of residual stresses around a crack tip developed under variable-amplitude fatigue loadings (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1111/j.1460-2695.2010.01490.x
AuthorSearch for: ; Search for: ; Search for: ; Search for:
TypeArticle
Journal titleFatigue & Fracture Of Engineering Materials & Structures
ISSN14602695
Volume33
Issue12
Pages822831; # of pages: 10
Subjectcrack tip; fatigue crack propagation; neutron diffraction; residual stress; variable-amplitude fatigue
AbstractThe spatially resolved neutron-diffraction residual stress mappings were performed on five compact-tension (CT) specimens subjected to various variable-amplitude fatigue loadings (e.g. overload, underload and their mixed loads) during fatigue crack propagation. Three principal residual-stress components (i.e. longitudinal, transverse and normal stresses) were measured as a function of the distance from the crack tip along the crack-propagation direction. The shape of respective crack tips on the five CT specimens was examined using scanning electron microscope. The results show the distinct residual-stress fields near the crack tip and significant changes in the crack-tip geometry for five different loading cases. It is thought that the combined effects of the changes in the residual-stress state and crack-tip geometry seem to be a key factor to account for the observed transient crack-growth phenomena.
Publication date
LanguageEnglish
AffiliationNRC Canadian Neutron Beam Centre; National Research Council Canada
Peer reviewedYes
NPARC number16945685
Export citationExport as RIS
Report a correctionReport a correction
Record identifierfbcc2de8-9555-4dd9-ae77-c093f3678842
Record created2011-03-03
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)