Intermittent dislocation density fluctuations in crystal plasticity from a phase-field crystal model

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Standard

Intermittent dislocation density fluctuations in crystal plasticity from a phase-field crystal model. / Tarp, Jens M.; Angheluta, Luiza; Mathiesen, Joachim; Goldenfeld, Nigel.

In: Physical Review Letters, Vol. 113, No. 26, 265503, 31.12.2014.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Tarp, JM, Angheluta, L, Mathiesen, J & Goldenfeld, N 2014, 'Intermittent dislocation density fluctuations in crystal plasticity from a phase-field crystal model', Physical Review Letters, vol. 113, no. 26, 265503. https://doi.org/10.1103/PhysRevLett.113.265503

APA

Tarp, J. M., Angheluta, L., Mathiesen, J., & Goldenfeld, N. (2014). Intermittent dislocation density fluctuations in crystal plasticity from a phase-field crystal model. Physical Review Letters, 113(26), [265503]. https://doi.org/10.1103/PhysRevLett.113.265503

Vancouver

Tarp JM, Angheluta L, Mathiesen J, Goldenfeld N. Intermittent dislocation density fluctuations in crystal plasticity from a phase-field crystal model. Physical Review Letters. 2014 Dec 31;113(26). 265503. https://doi.org/10.1103/PhysRevLett.113.265503

Author

Tarp, Jens M. ; Angheluta, Luiza ; Mathiesen, Joachim ; Goldenfeld, Nigel. / Intermittent dislocation density fluctuations in crystal plasticity from a phase-field crystal model. In: Physical Review Letters. 2014 ; Vol. 113, No. 26.

Bibtex

@article{8db67d351dde4254a4f584a45cc44b75,
title = "Intermittent dislocation density fluctuations in crystal plasticity from a phase-field crystal model",
abstract = "Plastic deformation mediated by collective dislocation dynamics is investigated in the two-dimensional phase-field crystal model of sheared single crystals. We find that intermittent fluctuations in the dislocation population number accompany bursts in the plastic strain-rate fluctuations. Dislocation number fluctuations exhibit a power-law spectral density 1/f2 at high frequencies f. The probability distribution of number fluctuations becomes bimodal at low driving rates corresponding to a scenario where low density of defects alternates at irregular times with high populations of defects. We propose a simple stochastic model of dislocation reaction kinetics that is able to capture these statistical properties of the dislocation density fluctuations as a function of shear rate.",
author = "Tarp, {Jens M.} and Luiza Angheluta and Joachim Mathiesen and Nigel Goldenfeld",
year = "2014",
month = dec,
day = "31",
doi = "10.1103/PhysRevLett.113.265503",
language = "English",
volume = "113",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "26",

}

RIS

TY - JOUR

T1 - Intermittent dislocation density fluctuations in crystal plasticity from a phase-field crystal model

AU - Tarp, Jens M.

AU - Angheluta, Luiza

AU - Mathiesen, Joachim

AU - Goldenfeld, Nigel

PY - 2014/12/31

Y1 - 2014/12/31

N2 - Plastic deformation mediated by collective dislocation dynamics is investigated in the two-dimensional phase-field crystal model of sheared single crystals. We find that intermittent fluctuations in the dislocation population number accompany bursts in the plastic strain-rate fluctuations. Dislocation number fluctuations exhibit a power-law spectral density 1/f2 at high frequencies f. The probability distribution of number fluctuations becomes bimodal at low driving rates corresponding to a scenario where low density of defects alternates at irregular times with high populations of defects. We propose a simple stochastic model of dislocation reaction kinetics that is able to capture these statistical properties of the dislocation density fluctuations as a function of shear rate.

AB - Plastic deformation mediated by collective dislocation dynamics is investigated in the two-dimensional phase-field crystal model of sheared single crystals. We find that intermittent fluctuations in the dislocation population number accompany bursts in the plastic strain-rate fluctuations. Dislocation number fluctuations exhibit a power-law spectral density 1/f2 at high frequencies f. The probability distribution of number fluctuations becomes bimodal at low driving rates corresponding to a scenario where low density of defects alternates at irregular times with high populations of defects. We propose a simple stochastic model of dislocation reaction kinetics that is able to capture these statistical properties of the dislocation density fluctuations as a function of shear rate.

U2 - 10.1103/PhysRevLett.113.265503

DO - 10.1103/PhysRevLett.113.265503

M3 - Journal article

C2 - 25615353

AN - SCOPUS:84920288202

VL - 113

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 26

M1 - 265503

ER -

ID: 130735381