Friction Material Compressibility as a Function of Pressure, Temperature, and Frequency

2008-01-2574

10/12/2008

Event
26th Brake Colloquium and Exhibition
Authors Abstract
Content
Compressibility is a common quality metric for friction materials. In addition, it is typically used as an engineering parameter for brake system design and performance. Compressibility (or elastic properties) of the friction material can effect brake roughness, pedal feel, and noise performance. A characterization technique is presented to determine the cyclic compressibility (over ± 1 kN) as a function of preload, temperature, frequency and time. The initial motivation was related to modeling of brake roughness, but applications to pedal feel and brake noise are also explored. For a given semi-metallic material, changing the temperature from 20 to 300°C or the preload from 8 to 4 kN both halve the cyclic compressibility. Less significantly, a change in frequency from 20 to 1 Hz reduces the cyclic compressibility by 10%. Differences between linings are also considered.
Meta TagsDetails
DOI
https://doi.org/10.4271/2008-01-2574
Pages
6
Citation
Sanders, P., Dalka, T., and Hartsock, D., "Friction Material Compressibility as a Function of Pressure, Temperature, and Frequency," SAE Technical Paper 2008-01-2574, 2008, https://doi.org/10.4271/2008-01-2574.
Additional Details
Publisher
Published
Oct 12, 2008
Product Code
2008-01-2574
Content Type
Technical Paper
Language
English