Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 9 of 9 for “"Sliding systems"”.
-
Mild wear in dry and lubricated sliding systems
… of experiments in air under dry and lubricating sliding conditions. For dry sliding low load and speed combinations were chosen to correspond to the mild wear region below the Welsh T1 transition. Lubricated tests were conducted under flooded conditions using Esso Technical White Oil alone and …
-
Thermo-Mechanical Instabilities in Next-Generation Friction Materials in High-Speed Sliding Systems
… instabilities (TMI) in high-speed sliding systems. Unfortunately, these metals have adverse environmental effects due to the emission of hazardous particulate matter. As a result, there is a growing movement towards adopting next-generation friction materials as an alternative …
-
Estimation of the Real Area of Contact in Sliding Systems Using Thermal Measurements
… through thermal measurements in 1D/2D systems. This allows computationally easier models, resulting in faster simulations within acceptable convergence. The second objective is to provide experimental design guidance. The methods used are a modified cellular automata technique for the …
-
A Model for Abrasive Polymer Wear
… startup, or "breakin", stage of polymer/steel sliding systems. This mechanism controls the polymer wear rate until the voids in the hard metal surface are filled, much like the filling observed with a file when used on soft metals. This regime of polymer wear is modeled on an event-by-event …
-
An investigation of friction and wear mechanisms in selected thermoplastics
… observations of abrasive wear of a polymer disk sliding against metal asperity models. The investigator was unable to observe actual particle formation but did identify elastic and plastic deformation of the polymer, and a debris buildup and extrusion process occurring at the leading edge of the …
-
Effect of hydrogen on the coefficient of friction of iron
The friction force of an Annco iron-on-Annco iron sliding system was measured in laboratory air, nitrogen, and hydrogen. The coefficient of friction for each environment was calculated and the amplitude of the "stick-slip" behavior from each environment was observed. It was found that the …
-
The onset of gouging in high-speed sliding contacts
Hypervelocity gouging occurs in high speed sliding systems such as rocket sled test tracks, light gas guns, and railguns. Gouging takes the form of teardrop-shaped craters on the rail surface, and usually only occurs above a threshold speed which is dependent on the slider and rail material …
-
An Experimental Study Of Atomic Scale Friction And Adhesion For 2d And Layered Materials: The Effects Of Interfacial Contact, Compliance, And Commensurability
… approaches to materials selection for sliding systems remain prevalent due to a lack of understanding of the underlying mechanisms of friction. This thesis discusses uses of atomic force microscopy to probe the atomic-scale mechanisms that drive frictional behavior on two-dimensional …
-
Finite Element Analysis of Thermal-Mechanical Instabilities in Nonmetallic Friction Composite Material
… interest as it focuses a lot on transportation systems. Thermal-mechanical instability was first noticed in railway and experimentally studied with a pin-to-pin or pin-to-surface setup of sliding contact. The topic has been extended into brakes and clutches which are two of the most common …