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Enabling strain hardening simulations with dislocation dynamics
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2007 (English)In: Modelling and Simulation in Materials Science and Engineering, ISSN 0965-0393, E-ISSN 1361-651X, Vol. 15, 553-595 p.Article in journal (Refereed) Published
Abstract [en]

Numerical algorithms for discrete dislocation dynamics simulations areinvestigated for the purpose of enabling strain hardening simulations of singlecrystals on massively parallel computers. The algorithms investigated includethe O(N) calculation of forces, the equations of motion, time integration,adaptive mesh refinement, the treatment of dislocation core reactions and thedynamic distribution of data and work on parallel computers. A simulationintegrating all these algorithmic elements using the Parallel DislocationSimulator (ParaDiS) code is performed to understand their behaviour in concertand to evaluate the overall numerical performance of dislocation dynamicssimulations and their ability to accumulate percent of plastic strain.

Place, publisher, year, edition, pages
2007. Vol. 15, 553-595 p.
Keyword [en]
plastic-deformation; elastic field; free-surface; fcc metals; crystals
National Category
Materials Engineering Condensed Matter Physics Computational Mathematics
Identifiers
URN: urn:nbn:se:kth:diva-11564DOI: 10.1088/0965-0393/15/6/001ISI: 000249392800001OAI: oai:DiVA.org:kth-11564DiVA: diva2:277750
Note
QC 20100805Available from: 2009-11-20 Created: 2009-11-20 Last updated: 2017-12-12Bibliographically approved
In thesis
1. Simulation of relaxation processes in complex condensed matter systems: Algorithmic and physical aspets
Open this publication in new window or tab >>Simulation of relaxation processes in complex condensed matter systems: Algorithmic and physical aspets
2009 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis summarizes interrelated simulation studies of three different physical phenomena. The three topics are: simulation of work hardening of materials using dislocation dynamics, investigation of anomalous diffusion in supercooled liquids using molecular dynamics,and kinetic Monte-Carlo simulation of annealing of radiation damaged materials. All three topics require special algorithms in order to enable physically relevant simulations. The author's contributionconsists of development, implementation, and optimization of these algorithms, as well as interpretation of simulation results.

Place, publisher, year, edition, pages
Stockholm: KTH, 2009. ix, 27 p.
Series
Trita-CSC-A, ISSN 1653-5723 ; 2009:21
National Category
Condensed Matter Physics Computational Mathematics Materials Engineering Condensed Matter Physics
Identifiers
urn:nbn:se:kth:diva-11574 (URN)978-91-7415-515-0 (ISBN)
Public defence
2009-12-10, D3, main building, Lindstedsvägen 3, KTH, Stockholm, 10:00 (English)
Opponent
Supervisors
Note
QC 20100805Available from: 2009-11-20 Created: 2009-11-20 Last updated: 2010-08-05Bibliographically approved

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