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Impact Wear Study of Lubricated Contacts
P. A. Engel,J. L. Sirico +1 more
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In this paper, the rate process of wear with respect to the impact parameters (normal and tangential approach velocity), and lubricant viscosity was investigated with a pivotal hammer type impact testers.Abstract:
Pivotal hammer type impact testers are used in an experimental study of repetitively impacted lubricated contacts. Various steels are used in one- and two-body wear modes; the rate process of wear is investigated with respect to the impact parameters (normal and tangential approach velocity), and lubricant viscosity. For normal impact, a boundary lubrication system forms, but superimposed sliding speeds with a viscous lubricant tend to create an elastohydrodynamic lubrication (EHL) condition, greatly resisting wear. Approximate measurable wear equations are derived for cylindrical striking surfaces. Presented as an American Society of Lubrication Engineers paper at the ASLE/ASME Lubrication Conference held in Montreal, Canada, October 8–10, 1974read more
Citations
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Journal ArticleDOI
Influence of surface roughness on normal-sliding lubrication
TL;DR: In this article, surface roughness affects the lubricant film characteristics under conditions of combined normal and sliding motion in a rotating roller which impacts a stationary ball in the presence of a lubricant.
Journal ArticleDOI
A modelling technique for predicting compound impact wear
TL;DR: In this article, a new modelling technique for predicting compound impact wear was developed, which was found to give improvements when compared with existing models in terms of both usability and accuracy of results.
Journal ArticleDOI
Percussive impact wear: A study of repetitively impacting solid components in engineering
TL;DR: In this article, a general engineering impact wear theory is outlined based on experimental results of the initiation and progress of wear, and the relationship between impact loads and wear scar geometry is modelled for general applications.
Journal ArticleDOI
Impact wear phenomena in thin polymer films
R.G. Bayer,P.A. Engel,E. Sacher +2 more
TL;DR: In this paper, impact wear testing of a variety of thin polymers has shown the wear process to be governed either by thermal effects during hammer contact or by a state of overstress.
Journal ArticleDOI
Lubrication of machine elements during combined squeeze and sliding motion
TL;DR: The motion when two parts in a machine come into contact can be a normal, sliding or rolling approach, or a combination of the three as discussed by the authors, and the case of combined normal and sliding motion can be very unfa...
References
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Book
Theory of elasticity
TL;DR: The theory of the slipline field is used in this article to solve the problem of stable and non-stressed problems in plane strains in a plane-strain scenario.
Book
Impact Wear of Materials
Peter A. Engel,Frederick F. Ling +1 more
TL;DR: In this article, the impact response of engineering surfaces is considered and a zero-impact wear model is proposed to quantify the impact of impact on a given surface, based on elastic contact solutions.
Journal ArticleDOI
The oil film in a closing gap
TL;DR: In this paper, a solution to a problem of elasto-hydrodynamics of normal approach is presented, where the viscosity of the separating film is taken to be a function of pressure and temperature.
Journal ArticleDOI
An engineering model of spalling fatigue failure in rolling contact. II. The surface model
T.E. Tallian,J.I. McCool +1 more
TL;DR: In this article, a model for explaining and predicting the incidence of rolling contact fatigue initiated at the contacting surfaces is presented, which includes fatigue initiating at pre-existent surface discontinuities such as furrows and pits and at the microgeometrical asperities on the surface.
Journal ArticleDOI
The Pressure and Deformation Profiles Between Two Normally Approaching Lubricated Cylinders
K. M. Lee,H. S. Cheng +1 more
TL;DR: In this paper, the authors obtained the pressure and deformation profiles between two colliding cylinders by solving the coupled, time-dependent elastohydrodynamic equations with an iterative procedure.