A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Abstract It is very hard experimentally to directly probe the nature of the rapid processes which occur at a sliding interface. But some information can be inferred indirectly by performing sliding friction measurements on well-defined systems, and registering the macroscopic (e.g., center-of-mass) motion of the block as a function of time. For lubricated surfaces, such measurements have been performed during the past few years, using the Surface Forces Apparatus (Chap. 3) [9.1–5]. These studies usually use mica surfaces which can be produced atomically smooth (without a single step) over macroscopic areas. A spring is connected to the mica block and the “free” end of the spring is moved with some velocity v s , which typically is kept constant but sometimes is allowed to change in time. The force in the spring is registered as a function of time and is the basic quantity measured in most of these friction studies. It is obvious that the time dependence of the spring force (and its dependence on v s ) contains information about the nature of the processes occurring at the sliding interface, but this information is very indirect.
Abstract It is very hard experimentally to directly probe the nature of the rapid processes which occur at a sliding interface. But some information can be inferred indirectly by performing sliding friction measurements on well-defined systems, and registering the macroscopic (e.g., center-of-mass) motion of the block as a function of time. For lubricated surfaces, such measurements have been performed during the past few years, using the Surface Forces Apparatus (Chap. 3) [9.1–5]. These studies usually use mica surfaces which can be produced atomically smooth (without a single step) over macroscopic areas. A spring is connected to the mica block and the “free” end of the spring is moved with some velocity v s , which typically is kept constant but sometimes is allowed to change in time. The force in the spring is registered as a function of time and is the basic quantity measured in most of these friction studies. It is obvious that the time dependence of the spring force (and its dependence on v s ) contains information about the nature of the processes occurring at the sliding interface, but this information is very indirect.
Boundary Lubrication
Dr. Persson, Bo N. J. (author)
Second Edition
2000-01-01
22 pages
Article/Chapter (Book)
Electronic Resource
English
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