Multichain Frenkel-Kontorova model for interfacial slip

Journal Article · Sat Jan 31 23:00:00 EST 1998 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.57.2759· OSTI ID:568314

Roeder, J ^[1]; Hammerberg, J E ^[2]; Holian, B L; Bishop, A R ^[1]

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1. Theoretical Division and Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
2. Applied Theoretical and Computational Physics Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

Using the results of large-scale molecular-dynamics simulations of dry, wearless friction between two flat one-dimensional interfaces, a simple frictional model is formulated with {ital specified parameters}. The model, a two-chain-driven Frenkel-Kontorova model with unidirectional motion, is studied numerically and analytically. In a certain regime of slip velocities behavior similar to that of the large-scale simulations is observed. This is characterized by kink-antikink excitations and a weakening of frictional force with increasing slip velocity. The insights given by the simple model lead us to postulate a mechanism for the nucleation of structures perpendicular to the interface in the large-scale system. {copyright} {ital 1998} {ital The American Physical Society}

• OSTI ID: 568314
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 5 Vol. 57; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
FRICTION
INTERFACES
MATHEMATICAL MODELS
MOLECULAR DYNAMICS METHOD
NUCLEATION
SIMULATION
SLIP