Study of plastic shear localization via the flow theory of mechanism-based strain gradient plasticity

Z. Sh, Yonggang Huang*, J. Song, K. C. Hwang, M. Li

*Corresponding author for this work

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The plastic shear localization is studied via the flow theory of mechanism-based strain gradient plasticity. The shear strain rate displays a rather sharp decrease from the center to the boundary of shear band, and gradually approaches the uniform remote shear strain rate outside the shear band. The shear band thickness obtained analytically is linearly proportional to the (length of) Burgers vector, and also depends on the softening modulus and mesoscale cell size. The maximum shear strain rate in the shear band, however, is sensitive to other material properties such as the ultimate tensile strength and intrinsic material length in strain gradient plasticity.

Original languageEnglish (US)
Pages (from-to)132-138
Number of pages7
JournalJournal of Engineering Mechanics
Volume135
Issue number3
DOIs
StatePublished - Feb 26 2009

Fingerprint

Shear bands
Plasticity
Shear strain
Plastics
Strain rate
Burgers vector
Materials properties
Tensile strength

Keywords

  • Material properties
  • Plasticity
  • Shear flow

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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abstract = "The plastic shear localization is studied via the flow theory of mechanism-based strain gradient plasticity. The shear strain rate displays a rather sharp decrease from the center to the boundary of shear band, and gradually approaches the uniform remote shear strain rate outside the shear band. The shear band thickness obtained analytically is linearly proportional to the (length of) Burgers vector, and also depends on the softening modulus and mesoscale cell size. The maximum shear strain rate in the shear band, however, is sensitive to other material properties such as the ultimate tensile strength and intrinsic material length in strain gradient plasticity.",
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Study of plastic shear localization via the flow theory of mechanism-based strain gradient plasticity. / Sh, Z.; Huang, Yonggang; Song, J.; Hwang, K. C.; Li, M.

In: Journal of Engineering Mechanics, Vol. 135, No. 3, 26.02.2009, p. 132-138.

Research output: Contribution to journalArticle

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T1 - Study of plastic shear localization via the flow theory of mechanism-based strain gradient plasticity

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AU - Li, M.

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AB - The plastic shear localization is studied via the flow theory of mechanism-based strain gradient plasticity. The shear strain rate displays a rather sharp decrease from the center to the boundary of shear band, and gradually approaches the uniform remote shear strain rate outside the shear band. The shear band thickness obtained analytically is linearly proportional to the (length of) Burgers vector, and also depends on the softening modulus and mesoscale cell size. The maximum shear strain rate in the shear band, however, is sensitive to other material properties such as the ultimate tensile strength and intrinsic material length in strain gradient plasticity.

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