Plastic strain localization and fracture mechanisms of metals subjected to dynamic loading

Authors

  • Mikhail Albertovich Sokovikov Institute of Continuous Media Mechanics UB RAS
  • Yuriy Vitalievich Bayandin Institute of Continuous Media Mechanics UB RAS
  • Elena Arkadievna Lyapunova Institute of Continuous Media Mechanics UB RAS
  • Oleg Anatolievich Plekhov Institute of Continuous Media Mechanics UB RAS
  • Vasiliy Valerievich Chudinov Institute of Continuous Media Mechanics UB RAS
  • Oleg Borisovich Naimark Institute of Continuous Media Mechanics UB RAS

DOI:

https://doi.org/10.7242/1999-6691/2013.6.4.51

Keywords:

plasticity, defects, fracture, shear, dynamic loading, target perforation

Abstract

The mechanisms responsible for instability and localization of plastic shear during dynamic deformation of metals are investigated. The instability mechanisms are related to the collective effects in the ensemble of microshears in the regions of space localization. In-situ infrared scanning of the instability region and the analysis of the dislocation substructure confirm the suggestion about the key role of non-equilibrium transitions in the ensembles of defects for the localized plastic flow evolution. Equations that describe the relationships between the non-equilibrium transitions and the mechanisms of structural relaxation and plastic flow are used to model the plastic shear instability.

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References

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Published

2013-12-29

Issue

Vol. 6 No. 4 (2013)

Section

Articles

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Copyright (c) 2013 Computational Continuum Mechanics

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How to Cite

Sokovikov, M. A., Bayandin, Y. V., Lyapunova, E. A., Plekhov, O. A., Chudinov, V. V., & Naimark, O. B. (2013). Plastic strain localization and fracture mechanisms of metals subjected to dynamic loading. Computational Continuum Mechanics, 6(4), 467-474. https://doi.org/10.7242/1999-6691/2013.6.4.51