Deterministic Modeling of Two-Body Abrasive Wear and Friction Relationships

While related at the asperity scale, friction and wear are rarely coupled in numerical models due to the trouble with most statistical contact mechanics in tracking actual asperity interactions. This project focuses on deterministically modeling of each asperity interaction between two sliding surfaces. While simulating the contact mechanics at each asperity junction using real material properties, surfaces are allowed to naturally evolve while predicting both friction and wear. simulation for abrasive wear of soft surface asperites
Simulation for Abrasive Wear of
Soft Surface Asperities
PFTL Research Assistant(s):   Patrick S. M. Dougherty
Method(s) Employed:   Deterministic contact mechanics, deterministic surface distributions, elastic/plastic/elasto-plastic contact, abrasive wear, evolving topography
Rig(s) and/or Software(s) Employed:   In-house pellet-on-disc with slider pad tribometer, Bruker UMT-3, Zygo New-View 7300 optical Interferometer;
Sponsor(s):   NSF GRFP Fellowship

Sample Results:




Select PFTL References:

1.) Dougherty, P., Stonestrom, D., Higgs III, C.F. "Modeling of Preferential Patterns Found During the Abrasive Wear of Random Surfaces" Proceedings of: STLE Annual Meeting and Exhibition. St. Louis, MO, May 2012.