Abstract
The development of advanced materials is driven by continuous progress in the synthesis and control of materials microstructure on sub-micrometer and nanometer scales. Confined to these length-scales, many materials show strikingly different physical properties from their bulk counterparts, like a strong increase in flow stress with decreasing size. This calls for an increased effort on physically motivated continuum theories which can predict size-dependent plasticity by accounting for length scales associated with the dislocation microstructure. An important recent development has been the formulation of a Continuum Dislocation Dynamics (CDD) Theory which provides a kinematically consistent continuum description of the dynamics of curved dislocation systems [1]. Here we present a brief overview of the CDD method and illustrate the implementation of the CDD by numerical examples, the bending of a thin film, the torsion of a wire, and the plastic flow around an elastic inclusion. Results are compared to three-dimensional discrete dislocation dynamics simulations.
Original language | English |
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Title of host publication | Conference Program for the 3rd International Conference on Heterogeneous Materials Mechanics, ICHMM 2011 |
Pages | 7-15 |
Number of pages | 9 |
Publication status | Published - 2011 |
Externally published | Yes |
Event | 3rd International Conference on Heterogeneous Materials Mechanics, ICHMM 2011 - Shanghai, China Duration: 22 May 2011 → 26 May 2011 |
Conference
Conference | 3rd International Conference on Heterogeneous Materials Mechanics, ICHMM 2011 |
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Country/Territory | China |
City | Shanghai |
Period | 22/05/11 → 26/05/11 |
Keywords
- Continuum theory
- Dislocation
- Plasticity
- Simulation
ASJC Scopus subject areas
- Mechanics of Materials