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Discrete Dislocation Plasticity

Erik Van der Giessen University of Groningen 31-50-363-8046

Amine Benzerga, Texas A&M,

Lucia Nicola, Delft

(Mechanics of Solids and Structures)

During the past two decades, modeling plasticity by the motion of discrete dislocations has become an increasing popular approach towards closing the gap between the physics of individual crystallographic defects and continuum plasticity theories developed in engineering. Discrete dislocation plasticity is ideally suited for phenomena occurring at the size scale of tens of micrometers and smaller, where there are too few dislocations for standard continuum descriptions to apply and too many dislocations for an atomistic description. It has shown capable of predicting some of the size effects seen experimentally in a variety of small objects, such as thin films and pillars. Thus, has served as a means to inform or rather (in)validate several plastic strain gradient theories. Also, discrete dislocation plasticity is able to address issues related to the limited availability of dislocation sources that are notamenable to standard continuum plasticity models. This symposium aims at bringing together researchers to exchange the latest developments in the field.

Symposium topics will include, but are not restricted to:

  • Numerical methods as well as experimental validation
  • Applications to plasticity in small volumes with particular emphasis on size effects
  • Upscaling approaches (coarse graining to strain gradient plasticity theory) or rather concurrent methods
  • New methodologies (phase field, level set, ...)
  • Multiphysics couplings (diffusion, oxidation, phase transformations, ...)

Joint sessions with the mini-symposium on Nanoindentation and Related Material Phenomena as well as with the symposium on Plasticity at different length scales are being considered.

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