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High performance computing and discrete dislocation dynamics: Plasticity of micrometer sized specimens

: Weygand, D.; Senger, J.; Motz, C.; Augustin, W.; Heuveline, V.; Gumbsch, P.


Nagel, W.E.:
High Performance Computing in Science and Engineering '08 : Transactions of the High Performance Computing Center, Stuttgart (HLRS) 2008
Berlin: Springer, 2009
ISBN: 978-3-540-88301-2
ISBN: 978-3-540-88303-6
Aufsatz in Buch
Fraunhofer IWM ()
strain gradient plasticity; crystal plasticity; thin film; simulation; deformation; strength; pillar; sample; dünne Schicht; Simulation; Deformation; Kristallplastizität

A parallel discrete dislocation dynamics tool is employed to study the size dependent plasticity of small metallic structures. The tool has been parallelised using OpenMP. An excellent overall scaling is observed for different loading scenarios. The size dependency of the plastic flow is confirmed by the performed simulations for uniaxial loading and micro-bending tests. The microstructural origin of the size effect is analysed. A strong influence of the initial microstructure on the statistics of the deformation behaviour is observed, for both the uniaxial and bending scenario.