Size effects in dislocation depinning models for plastic yield
| Autor: | Zoe Budrikis, Stefano Zapperi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Statistics and Probability
Length scale Materials science Yield (engineering) Crossover FOS: Physical sciences Condensed Matter - Soft Condensed Matter 01 natural sciences defects (theory) plasticity (theory) avalanches (theory) 010305 fluids & plasmas 0103 physical sciences 010306 general physics Scaling Microscale chemistry Condensed Matter - Statistical Mechanics Statistical Mechanics (cond-mat.stat-mech) interfaces in random media (theory) Statistical and Nonlinear Physics Mechanics Plasticity theory Hardening (metallurgy) Soft Condensed Matter (cond-mat.soft) Statistics Probability and Uncertainty Dislocation |
| Zdroj: | Journal of statistical mechanics 2013 (2013). doi:10.1088/1742-5468/2013/04/P04029 info:cnr-pdr/source/autori:Budrikis Z.; Zapperi S./titolo:Size effects in dislocation depinning models for plastic yield/doi:10.1088%2F1742-5468%2F2013%2F04%2FP04029/rivista:Journal of statistical mechanics/anno:2013/pagina_da:/pagina_a:/intervallo_pagine:/volume:2013 Journal of Statistical Mechanics: Theory and Experiment |
| DOI: | 10.1088/1742-5468/2013/04/P04029 |
| Popis: | Typically, the plastic yield stress of a sample is determined from a stress-strain curve by defining a yield strain and reading off the stress required to attain it. However, it is not a priori clear that yield strengths of microscale samples measured this way should display the correct finite size scaling. Here we study plastic yield as a depinning transition of a 1+1 dimensional interface, and consider how finite size effects depend on the choice of yield strain, as well as the presence of hardening and the strength of elastic coupling. Our results indicate that in sufficiently large systems, the choice of yield strain is unimportant, but in smaller systems one must take care to avoid spurious effects. 7 pages, 8 figures |
| Databáze: | OpenAIRE |
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