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Conference Papers Year : 2006

Influence of inertia on the formation of dislocation dipoles

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Laurianne Pillon
  • Function : Author
  • PersonId : 862957
Christophe Denoual
  • Function : Author
  • PersonId : 862958
Ronan Madec
  • Function : Author
  • PersonId : 862959
Yves-Patrick Pellegrini

Abstract

The stability of an edge dislocation dipole is analysed with two different simulation techniques. The first one utilizes the Peierls-Nabarro Galerkin method, where the time-dependent displacement field around dislocations is computed with a finite-element code. The method, used as a reference, naturally accounts for inertial effects and reproduces unsteady dislocation motion with accompanying stress waves emission. The second technique uses a two-dimensional dislocation dynamics code which relies on expressions for relativistic effective dislocation masses and related analytic approximation of the interaction force. Comparison between the results obtained with the two techniques for various viscosities and driving forces show that, as far as dipole obstacles are concerned, inertial effects are important, but that relativistic effects may be neglected.

Dates and versions

cea-00412647 , version 1 (02-09-2009)

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Laurianne Pillon, Christophe Denoual, Ronan Madec, Yves-Patrick Pellegrini. Influence of inertia on the formation of dislocation dipoles. EURODYMAT 2006 - 8th International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading, Sep 2006, Dijon, France. pp.49-54, ⟨10.1051/jp4:2006134009⟩. ⟨cea-00412647⟩

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