Utilizing a novel lattice orientation based stress characterization method to study stress fields of shear bands

Darren C. Pagan, Armand J. Beaudoin

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

A new framework for evaluating stress fields from distributions of crystallographic orientation is presented. The framework employs the kinematics of crystal plasticity and field dislocation mechanics to connect measured lattice orientation, crystallographic slip, and geometrically necessary dislocations to recover the elastic deformation field present, and subsequently determine the stress using a finite-element scheme. As a demonstration of the framework's utility, stress fields generated by the formation of shear bands in a copper single crystal are studied, including how these bands’ stress fields drive secondary slip. The results indicate that small amounts of secondary slip shielded stresses produced by the shear bands and that the bands were oriented in a low-energy configuration, stabilizing their structure.

Original languageEnglish (US)
Pages (from-to)105-116
Number of pages12
JournalJournal of the Mechanics and Physics of Solids
Volume128
DOIs
StatePublished - Jul 2019

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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