Dislocation based Plasticity

P3 - Continuum Dislocation Dynamics

This project aims at the representation of dislocation motion and interactions as direct averaging of discrete dislocation dynamics. The main objective of this project is a meaningful homogenization of the behavior of discrete dislocation ensembles into a continuum description without undetermined fitting parameters.

 

 

The consideration of dislocation interactions and dislocation reactions is essential to represent the constitutive behavior in an averaged formulation correctly. Based on detailed examinations of different phenomena of interactions, as e.g. dislocation pile-ups, dipole formation and dissolution, and reactions in 3D, adequate concepts have to be found to include a physically meaningful formulation of dislocation velocity in the averaged formulation.

In this connections, the main objectives are:
 

  • Representation of dislocation interactions and reaction using ensemble averages
  • Reduction of phenomenological fitting parameters in existing approaches
  • Representation of the formation of dislocation network structures at interfaces
  • Discussion of stress and strain concentrations at grain boundaries and internal interfaces, e.g. in composite materials

 


Members:
Prof. Dr. rer. nat. Peter Gumbsch, Institute for Applied Materials – Computational Materials Science, KIT
Dr.-Ing. Katrin Schulz, Institute for Applied Materials - Computational Materials Science, KIT
M.Sc. Markus Sudmanns, Institute for Applied Materials - Computational Materials Science, KIT
M.Sc. Kolja Zoller, Institute for Applied Materials - Computational Materials Science, KIT

Alumni:
Dr. Severin Schmitt