Controlling Strain Bursts and Avalanches at the Nano- to Micrometer Scale
Journal Article
·
· Physical Review Letters
- Univ. of California, Los Angeles, CA (United States). Mechanical and Aerospace Engineering Dept.
We demonstrate, through three-dimensional discrete dislocation dynamics simulations, that the complex dynamical response of nano- and microcrystals to external constraints can be tuned. Under load rate control, strain bursts are shown to exhibit scale-free avalanche statistics, similar to critical phenomena in many physical systems. For the other extreme of displacement rate control, strain burst response transitions to quasiperiodic oscillations, similar to stick-slip earthquakes. External load mode control is shown to enable a qualitative transition in the complex collective dynamics of dislocations from self-organized criticality to quasiperiodic oscillations.
- Research Organization:
- Univ. of California, Los Angeles, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- Grant/Contract Number:
- FG02-03ER54708
- OSTI ID:
- 1536432
- Alternate ID(s):
- OSTI ID: 1328249
- Journal Information:
- Physical Review Letters, Vol. 117, Issue 15; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 40 works
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