Abstract
An analytic geometric model of phonon-dislocation interaction is employed to simulate the shielding of phonon wind drag in moving dislocation arrays. In the model, we use assumptions that overestimate the shielding effect to calculate an upper bound for the deviation of drag on arrays from drag on single dislocations. For the system of a one-dimensional array of gliding dislocations in copper, we calculate that 6-25 % of the phonon drag is shielded by neighbor dislocations in the array. The model can be extended to other materials and dislocation distributions, but we show that for typical FCC crystals, calculating drag forces using a single dislocation is still a valid approximation.
Original language | English (US) |
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Pages (from-to) | 431-434 |
Number of pages | 4 |
Journal | Tribology Letters |
Volume | 47 |
Issue number | 3 |
DOIs | |
State | Published - Sep 2012 |
Keywords
- Friction mechanisms
- Nanotribology
- Stress analysis
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Surfaces and Interfaces
- Surfaces, Coatings and Films