Orientation dependence of stress distributions in polycrystals deforming elastoplastically under biaxial loadings

Download
  1. Get@NRC: Orientation dependence of stress distributions in polycrystals deforming elastoplastically under biaxial loadings (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1016/j.jmps.2012.01.007
AuthorSearch for: ; Search for: ; Search for:
TypeArticle
Journal titleJournal of the Mechanics and Physics of Solids
ISSN0022-5096
Volume60
Issue5
Pages921944; # of pages: 24
Subjectpolycrystal plasticity; biaxial loading; neutron diffraction; finite element modeling; austenitic stainless steels
AbstractThe influence of biaxiality of the loading on the crystallographic orientation dependence of crystal stress distributions is examined for polycrystalline solids deformed well into the elastoplastic regime. The examination is couched in terms of two decompositions of the stress. The first is a split of the tensor into its hydrostatic and deviatoric components; the second is a spectral decomposition of the deviatoric stress from which we express the relative values of the principal components as a function of the biaxiality of the stress. Using the framework provided by these decompositions, we investigate trends observed in the lattice strains in polycrystals subjected to biaxial loadings, comparing strains measured by neutron diffraction with finite element simulations. We conclude by showing how the orientation dependence of the stress distributions is influenced by the load biaxiality and by connecting features of the distributions to the elastic and plastic properties of the crystals. Implications of the results are discussed relative to the modeling of strain hardening and defect initiation.
Publication date
PublisherElsevier
LanguageEnglish
AffiliationNRC Canadian Neutron Beam Centre; National Research Council Canada
Peer reviewedYes
NPARC number21268032
Export citationExport as RIS
Report a correctionReport a correction
Record identifier7858e020-1855-4603-80db-a36634ea49fe
Record created2013-04-04
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)