Plastic distortion as a fundamental mechanism in nonlinear mesomechanics of plastic deformation and fracture

V. E. Panin, V. E. Egorushkin, A. V. Panin, A. G. Chernyavskii

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

Any deformed solid represents two self-consistent functional subsystems: a 3D crystal subsystem and a 2D planar subsystem (surface layers and all internal interfaces). In the planar subsystem, which lacks thermodynamic equilibrium and translation invariance, a primary plastic flow develops as nonlinear waves of structural transformations. At the nanoscale, such planar nonlinear transformations create lattice curvature in the 3D subsystem, resulting in bifurcational interstitial states there. The bifurcational states give rise to a fundamentally new mechanism of plastic deformation and fracture—plastic distortion—which is allowed for neither in continuum mechanics nor in fracture mechanics. The paper substantiates that plastic distortion plays a leading role in dislocation generation and glide, plasticity and superplasticity, plastic strain localization and fracture.

Original languageEnglish
Pages (from-to)255-268
Number of pages14
JournalPhysical Mesomechanics
Volume19
Issue number3
DOIs
Publication statusPublished - 1 Jul 2016

Keywords

  • bifurcational interstitial states
  • dislocation generation and motion
  • fracture
  • lattice curvature
  • plastic distortion
  • superplasticity

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Surfaces and Interfaces

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