Role of adhesion stress in controlling transition between plastic, grinding and breakaway regimes of adhesive wear A. V. Dimaki, E. V. Shilko, I. V. Dudkin [et al.]
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ArticleContent type: Текст Media type: электронный Subject(s): адгезионное напряжение | адгезионный износ | упругопластические материалы | дискретно-элементные моделиGenre/Form: статьи в журналах Online resources: Click here to access online
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Scientific Reports [Еlectronic resource] Vol. 10. P. 1585 (1-13)Abstract: A discrete-element based model of elastic-plastic materials with non-ideal plasticity and with an
account of both cohesive and adhesive interactions inside the material is developed and verified.
Based on this model, a detailed study of factors controlling the modes of adhesive wear is performed.
Depending on the material and loading parameters, we observed three main modes of wear: slipping,
plastic grinding, cleavage, and breakaway. We find that occurrence of a particular mode is determined
by the combination of two dimensionless material parameters: (1) the ratio of the adhesive stress to
the pure shear strength of the material, and (2) sensitivity parameter of material shear strength to
local pressure. The case study map of asperity wear modes in the space of these parameters has been
constructed. Results of this study further develop the findings of the widely discussed studies by the
groups of J.-F. Molinari and L. Pastewka.
Библиогр.: 37 назв.
A discrete-element based model of elastic-plastic materials with non-ideal plasticity and with an
account of both cohesive and adhesive interactions inside the material is developed and verified.
Based on this model, a detailed study of factors controlling the modes of adhesive wear is performed.
Depending on the material and loading parameters, we observed three main modes of wear: slipping,
plastic grinding, cleavage, and breakaway. We find that occurrence of a particular mode is determined
by the combination of two dimensionless material parameters: (1) the ratio of the adhesive stress to
the pure shear strength of the material, and (2) sensitivity parameter of material shear strength to
local pressure. The case study map of asperity wear modes in the space of these parameters has been
constructed. Results of this study further develop the findings of the widely discussed studies by the
groups of J.-F. Molinari and L. Pastewka.
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