Molecular dynamics simulations of metallic friction and of its dependence on electric currents: development and first results
MetadataShow full item record
We have extended the HOLA molecular dynamics (MD) code to run slider-on-block friction experiments for Al and Cu. Both objects are allowed to evolve freely and show marked deformation despite the hardness difference. We recover realistic coefficients of friction and verify the importance of cold-welding and plastic deformations in dry sliding friction. Our first data also show a mechanism for decoupling between load and friction at high velocities. Such a mechanism can explain an increase in the coefficient of friction of metals with velocity. The study of the effects of currents on our system required the development of a suitable electrodynamic (ED) solver, as the disparity of MD and ED time scales threatened the efficiency of our code. Our first simulations combining ED and MD are presented.
Showing items related by title, author, creator and subject.
Schwartz, Jairus Daniel; 0000-0003-2204-2458 (2016-12)Frictional losses in combustion engines have been the subject of many automotive engineers’ research. Understanding the fundamentals behind each frictional loss helps pave the way to finding a solution in reducing the ...
Bars In Disk-Dominated And Bulge-Dominated Galaxies At Z Similar To 0: New Insights From Similar To 3600 SDSS Galaxies Barazza, Fabio D.; Jogee, Shardha; Marinova, Irina (2008-03)We present a study of large-scale bars in the local universe, based on a large sample of 3692 galaxies, with 18.5 <= M(g) < -22.0 mag and redshift 0.01 <= z < 0.03, drawn from the Sloan Digitized Sky Survey. Our sample ...
Hydraulic conductivity measurement of permeable friction course (PFC) experiencing two-dimensional nonlinear flow effects Klenzendorf, Joshua Brandon; Charbeneau, Randall J.; Barrett, Michael E. (Center for Research in Water Resources, University of Texas at Austin, 2010-05)