Characterization of edge cracking using a crystal plasticity model with damage evolution

Soondo Kweon, Armand J. Beaudoin, Russell J. McDonald

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A challenge to the analysis of edge cracking in the aluminum rolling industry lies in the nature of the stress state at the side of the slab. Traditional models for damage evolution are dependent on the state of tensile hydrostatic stress, whereas edge cracking is developed at free surface and in the presence of shear, where hydrostatic stress cannot build up macroscopically. Due to the inability of traditional damage models to capture damage associated with shear, researchers have introduced the phenomenological Lode parameter to model shear damage. These models are generally applied through use of J2 plasticity. In this study, the underlying physics in the shear damage process are explored through the mesoscale process of grain-to-grain interaction. A polycrystal model implemented with finite elements is subjected to different loading conditions. Hydrostatic stress develops within grains via grain interaction, even with an "average" or macroscopic deformation of simple shear. Shear experiments were conducted utilizing the DIC (Digital Image Correlation) technique to measure deformation gradients for various loading scenarios.

Original languageEnglish (US)
Title of host publicationLinking Science and Technology for Global Solution - Proceedings of Symposia held during TMS 2009 Annual Meeting and Exhibition
Pages1201-1206
Number of pages6
StatePublished - Jun 24 2009
EventTMS 2009 Annual Meeting and Exhibition - San Francisco, CA, United States
Duration: Feb 16 2009Feb 19 2009

Publication series

NameTMS Annual Meeting

Other

OtherTMS 2009 Annual Meeting and Exhibition
CountryUnited States
CitySan Francisco, CA
Period2/16/092/19/09

Keywords

  • DIC
  • Edge crack
  • Grain interaction
  • Hydrostatic stress
  • Shear damage

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

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