Wiki Tag: power spectral density

power spectral density of a rough surface

Power Spectral Density of Rough Surfaces

26.08.2018 tribonet

Roughness is known to be an important factor in friction, wear and related performance of the machine parts. It was shown recently that Power Spectrum Density (PSD) can be used as a metric to describe […]

What contributes to thicker grease films ?

27.09.2016

A rolling bearing preferably runs under EHL conditions. The film thickness between the rolling elements and the rings is determined by the lubricant properties, operating conditions and bearing design. During the initial phase of operation, [...]
Friction has memory

18.06.2018

Experiments show that the friction between two surfaces depends on their history of contact and that this “memory” is reminiscent of the behavior of glasses. Contrary to what you may have learned in high school, [...]
Triboelectric generators can be used to improve mass spectroscopy sensors

10.05.2017

[embedded content] Triboelectric nanogenerators convert mechanical energy harvested from the environment to electricity for powering small devices such as sensors or for recharging consumer electronics. Now, researchers have harnessed these devices to improve the charging [...]
Measuring adhesion and friction of polymer nanofibers

04.01.2021

Nanofibers are tiny fibers with diameters measured in the nanometer range. They can be generated by a variety of methods, from various different polymers, therefore they can exhibit different physical properties with different application potentials. [...]
Predicting Wear of Marine Infrastructure due to Ice Melting

30.09.2019

Rubble ice is a jumble of ice fragments or small pieces of ice, which cover an expansive area with no particular pattern or order. Areas in the Arctic and Antarctica have large expanses of rubble [...]