Crystal stress distribution evolution of elastoplastically deforming polycrystals over crystal orientation space

Tongseok Han, Sang Yeop Chung, Byeongchan Lee

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

As techniques for measuring and modeling crystal stresses have become increasingly available, a more thorough investigation of crystalline solids' behavior is possible. As experimental techniques that are suitable for investigating synchrotron X-ray diffraction are developed, stress tensors of plastically deforming polycrystalline solids can be obtained. In this study, the mechanism behind the stress tensor evolution of plastically deforming polycrystalline solids is presented. From a simulation model that has been calibrated with the X-ray synchrotron results of a copper specimen under uniaxial tension, the elastoplastic behavior of deforming polycrystals is analyzed. This analysis determined that the crystal stress distributions depend heavily on the crystal orientation. To provide insights into the crystal stress evolution during plastic flow, the angular distance (proximity) between the crystal stress direction and the single crystal yield surface vertices were used to investigated the preferred crystal stress direction, its evolution pattern, and the applied loading direction. This confirms that, as plasticity develops, crystal stress tends to move toward the closest vertex of the single crystal yield surface from the applied loading direction.

Original languageEnglish
Pages (from-to)9-17
Number of pages9
JournalComputational Materials Science
Volume75
DOIs
Publication statusPublished - 2013 Apr 29

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space orientation
Polycrystal
Polycrystals
polycrystals
Stress Distribution
Crystal orientation
stress distribution
Stress concentration
Crystal
Crystals
crystals
Stress Tensor
stress tensors
Single Crystal
Synchrotrons
Tensors
synchrotrons
apexes
Single crystals
plastic flow

All Science Journal Classification (ASJC) codes

  • Computer Science(all)
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Physics and Astronomy(all)
  • Computational Mathematics

Cite this

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title = "Crystal stress distribution evolution of elastoplastically deforming polycrystals over crystal orientation space",
abstract = "As techniques for measuring and modeling crystal stresses have become increasingly available, a more thorough investigation of crystalline solids' behavior is possible. As experimental techniques that are suitable for investigating synchrotron X-ray diffraction are developed, stress tensors of plastically deforming polycrystalline solids can be obtained. In this study, the mechanism behind the stress tensor evolution of plastically deforming polycrystalline solids is presented. From a simulation model that has been calibrated with the X-ray synchrotron results of a copper specimen under uniaxial tension, the elastoplastic behavior of deforming polycrystals is analyzed. This analysis determined that the crystal stress distributions depend heavily on the crystal orientation. To provide insights into the crystal stress evolution during plastic flow, the angular distance (proximity) between the crystal stress direction and the single crystal yield surface vertices were used to investigated the preferred crystal stress direction, its evolution pattern, and the applied loading direction. This confirms that, as plasticity develops, crystal stress tends to move toward the closest vertex of the single crystal yield surface from the applied loading direction.",
author = "Tongseok Han and Chung, {Sang Yeop} and Byeongchan Lee",
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Crystal stress distribution evolution of elastoplastically deforming polycrystals over crystal orientation space. / Han, Tongseok; Chung, Sang Yeop; Lee, Byeongchan.

In: Computational Materials Science, Vol. 75, 29.04.2013, p. 9-17.

Research output: Contribution to journalArticle

TY - JOUR

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AU - Chung, Sang Yeop

AU - Lee, Byeongchan

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AB - As techniques for measuring and modeling crystal stresses have become increasingly available, a more thorough investigation of crystalline solids' behavior is possible. As experimental techniques that are suitable for investigating synchrotron X-ray diffraction are developed, stress tensors of plastically deforming polycrystalline solids can be obtained. In this study, the mechanism behind the stress tensor evolution of plastically deforming polycrystalline solids is presented. From a simulation model that has been calibrated with the X-ray synchrotron results of a copper specimen under uniaxial tension, the elastoplastic behavior of deforming polycrystals is analyzed. This analysis determined that the crystal stress distributions depend heavily on the crystal orientation. To provide insights into the crystal stress evolution during plastic flow, the angular distance (proximity) between the crystal stress direction and the single crystal yield surface vertices were used to investigated the preferred crystal stress direction, its evolution pattern, and the applied loading direction. This confirms that, as plasticity develops, crystal stress tends to move toward the closest vertex of the single crystal yield surface from the applied loading direction.

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