ISSN:
1573-4900
Keywords:
Dislocations
;
Friction
;
Molecular dynamics
;
Shock waves
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract Large-scale atomistic simulations by non-equilibrium molecular dynamics have revealed that shock-wave loading and high-speed friction between dry metal interfaces have surprising similarities, in that plastic deformation occurs by the violent birth of dislocations. Shock-wave deformation is initiated at the shock front, while in sliding friction, the interface produces dislocations that move first within the plane and then out of it, so as to generate a microstructure that accommodates the slippage. For both shocks and friction in perfect, or nearly perfect, crystals, there is a threshold driving force that needs to be overcome in order to induce plastic flow. Below that threshold, pre-existing extended defects are able to trigger plastic microstructure that resembles the kind seen above the threshold.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1008641217554
