Abstract:
:The adhesive wear process remains one of the least understood areas of mechanics. While it has long been established that adhesive wear is a direct result of contacting surface asperities, an agreed upon understanding of how contacting asperities lead to wear debris particle has remained elusive. This has restricted adhesive wear prediction to empirical models with limited transferability. Here we show that discrepant observations and predictions of two distinct adhesive wear mechanisms can be reconciled into a unified framework. Using atomistic simulations with model interatomic potentials, we reveal a transition in the asperity wear mechanism when contact junctions fall below a critical length scale. A simple analytic model is formulated to predict the transition in both the simulation results and experiments. This new understanding may help expand use of computer modelling to explore adhesive wear processes and to advance physics-based wear laws without empirical coefficients.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Aghababaei R,Warner DH,Molinari JFdoi
10.1038/ncomms11816subject
Has Abstractpub_date
2016-06-06 00:00:00pages
11816issn
2041-1723pii
ncomms11816journal_volume
7pub_type
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