Regressions of brake pads compressibility from experimental data

2019-36-0014

01/13/2020

Event
2019 SAE Brasil International Brake and Motion Control Colloquium and Exhibit
Authors Abstract
Content
One of the critical characteristics in a brake pad is its deformation when subjected to compressive loads. This deformation is called compressibility, which can be obtained quantitatively through compression cycles performed by a specific test bench. However, such testing is costly and long enough not to meet the demand of manufacturers of friction materials.
To overcome this difficulty, this work presents regressions for the estimation of compressibility through the natural frequencies of the pads, since they can be obtained quickly and at low cost through a simple modal analysis. The theoretical basis for the correlation between compressibility and natural frequencies includes the theory of elasticity - which defines an inverse relationship between strain and stiffness - and the theory of vibrations, which defines the natural frequencies of a mechanical system as a function of its mass matrices and stiffness. Since the dependent variable (compressibility) and explanatory variable (natural frequency) are linked to stiffness, it is theoretically plausible to direct estimative.
As additional explanatory variables, in addition to the experimental data of natural frequencies, the work uses the mass values and the temperature during the natural frequency measurement to improve the regression models.
Meta TagsDetails
DOI
https://doi.org/10.4271/2019-36-0014
Pages
8
Citation
Suetti, A., "Regressions of brake pads compressibility from experimental data," SAE Technical Paper 2019-36-0014, 2020, https://doi.org/10.4271/2019-36-0014.
Additional Details
Publisher
Published
Jan 13, 2020
Product Code
2019-36-0014
Content Type
Technical Paper
Language
English