期刊
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
卷 -, 期 -, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1742-5468/2015/02/P02011
关键词
finite-size scaling; surface effects (theory); disordered systems (theory); plasticity (theory)
资金
- German Research Foundation (DFG) under the DFG Research Group [FOR 1650, Sa-2291/1-1]
- European Research Council through the Advanced Grant SIZEFFECTS
- Academy of Finland FiDiPro progam [13282993]
Crystalline plasticity is strongly interlinked with dislocation mechanics and nowadays is relatively well understood. Concepts and physical models of plastic deformation in amorphous materials on the other hand-where the concept of linear lattice defects is not applicable-still are lagging behind. We introduce an eigenstrain-based finite element lattice model for simulations of shear band formation and strain avalanches. Our model allows us to study the influence of surfaces and finite size effects on the statistics of avalanches. We find that even with relatively complex loading conditions and open boundary conditions, critical exponents describing avalanche statistics are unchanged, which validates the use of simpler scalar lattice-based models to study these phenomena.
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