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Regensburg 2004 – scientific programme

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DY: Dynamik und Statistische Physik

DY 46: Poster

DY 46.47: Poster

Thursday, March 11, 2004, 16:00–18:00, Poster D

Solid friction at model metal interfaces studied via NEMD computer simulations — •Igor Stankovic1, Martin Kröger 2, and Siegfried Hess11Institute of Theoretical Physics, PN 7-1, Technical University of Berlin, Hardenbergstr. 36, D - 10623 Berlin — 2Polymer Physics, ETH Zurich, ML H18, Sonneggstr. 3, CH-8092 Zurich

The embedded atom method is adopted to study structural changes and mechanical alloying at model metal interfaces during dry solid friction [1,2,3]. The main constitutive properties of real metals, i.e., cohesive energy, elastic constants, and heat of solution, are reproduced by a set of a few basic model parameters. The model metal is subjected to shear deformation and strong flow via non-equilibrium molecular dynamics in order to discuss the origins of some qualitative properties observed more specific embedded atom potentials. The mechanisms leading to mechanical alloying at interface are observed and discussed [3]. Information about crystal structure inside NEMD configurations is obtained with No-dqcommon neighbor analysisNo-dq, based on planar graphs [4].

1. M. S. Daw and M. I. Baskes, Phys. Rev. Lett. 50, 1285 (1983).
Phys. Rev. B 29, 6443 (1984).
2. I. Stankovic, M. Kröger, and S. Hess, Phys. Rev. E, accepted 2003.
3. M. Kröger, I. Stankovic, and S. Hess, Multiscale Model. Simul. 1, 25-39 (2003).
4. I. Stankovic, M. Kröger, and S. Hess, Comput. Phys. Commun. 145, 371 (2002).

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