Journal ArticleDOI
Contact and Rubbing of Flat Surfaces
TLDR
In this article, the authors compared the deduced dependence of the experimental observables on the load with the experimental evidence and concluded that the most realistic model is one in which increasing the load increases both the number and size of the contact areas.Abstract:
The interpretation of certain phenomena occuring at nominally flat surfaces in stationary or sliding contact is dependent on the assumed distribution of the real area of contact between the surfaces. Since there is little direct evidence on which to base an estimate of this distribution, the approach used is to set up a simple model and compare the deduced theory (e.g., the deduced dependence of the experimental observables on the load) with the experimental evidence. The main conclusions are as follows. (a) The electrical contact resistance depends on the model used to represent the surfaces; the most realistic model is one in which increasing the load increases both the number and size of the contact areas. (b) In general, mechanical wear should also depend on the model. However, in wear experiments showing the simplest behavior, the wear rate is proportional to the load, and these results can be explained by assuming removal of lumps at contact areas formed by plastic deformation; moreover, this particular deduction is independent of the assumed model. This suggests that a basic assumption of previous theories, that increasing the load increases the number of contacts without affecting their average size, is redundant.read more
Citations
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Journal ArticleDOI
Modeling and simulation of wear in revolute clearance joints in multibody systems
TL;DR: In this article, a simple model for a revolute joint in the framework of multibody systems formulation is presented, based on a continuous contact force model that accounts for the geometrical and materials properties of the colliding bodies.
Journal ArticleDOI
The contribution of DEM to the science of comminution
Nirmal Weerasekara,Malcolm Powell,Paul W. Cleary,Luís Marcelo Tavares,Magnus Evertsson,Rob Morrison,Johannes Quist,Rodrigo M. de Carvalho +7 more
TL;DR: In this article, the authors provide a general overview of the application of computational techniques to the science of comminution, including simulation of fracture, breakage, crushing, milling and equipment wear.
Journal ArticleDOI
Friction and wear behaviors of nanocrystalline surface layer of pure copper
TL;DR: In this article, surface mechanical attrition treatment (SMAT) was employed to fabricate a nanocrystalline surface layer on a pure copper plate and the tribological behavior of the surface layer was investigated under dry conditions.
Journal ArticleDOI
Combination of discrete element and finite element methods for dynamic analysis of geomechanics problems
Eugenio Oñate,Jerzy Rojek +1 more
TL;DR: In this article, a combination of discrete element method (DEM) and finite element method for dynamic analysis of geomechanics problems is presented, which can employ spherical (or cylindrical in 2D) rigid elements and finite elements in the discretization of different parts of the system.
Journal ArticleDOI
Roughness and wear during brittle faulting
TL;DR: In this article, a model for wear during brittle faulting which considers the scaling of surface roughness was proposed to explain the difference between wear on experimental faults and wear on natural faults.
References
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Book
The friction and lubrication of solids
Frank Philip Bowden,David Tabor +1 more
TL;DR: Tabor and Bowden as mentioned in this paper reviewed the many advances made in this field during the past 36 years and outlined the achievements of Frank Philip Bowden, and reviewed the behavior of non-metals, especially elastomers; elastohydrodynamic lubrication; and the wear of sliding surfaces.
Journal ArticleDOI
The Nature of the Static and Kinetic Coefficients of Friction
TL;DR: In this article, the transition between static and kinetic conditions when stationary metal surfaces are set into motion is determined by measuring the energy that has to be given to one of the bodies to start it moving.
Journal ArticleDOI
On the Empirical Law of Adhesive Wear
J. T. Burwell,C. D. Strang +1 more
TL;DR: In this paper, the wear of rubbing steel surfaces as a function of load, distance of travel, and hardness under controlled conditions was measured and the effect of all factors except adhesion was analyzed.
Journal ArticleDOI
Metallic transfer between sliding metals: an autoradiographic study
Ernest Rabinowicz,David Tabor +1 more
TL;DR: In this article, a study of the friction and metallic transfer between sliding metal surfaces in the absence and in the presence of boundary lubricant films has been conducted, showing that the metallic transfer consists of a relatively small number of discrete particles and that the main function of a boundary lube is to reduce the amount of metallic interaction.
Journal ArticleDOI
Deformation of metals in static and in sliding contact
TL;DR: In this article, a detailed examination of the surface damage produced during sliding shows that metallic junctions are formed and sheared during the sliding process, and it is suggested that they are produced by a cold welding of the surfaces as a result of the high localized pressures developed at the points of real contact.