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Studies on Axial and Tangential Properties of Brake Pads
Technical Paper
2017-36-0010
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The knowledge of the elastic properties of friction materials is especially important in the development of brake systems. The stiffness of the system directly impacts on the consumption of the fluid during braking and the user interaction with the brake pedal, in addition to being strongly linked to the occurrence or not of certain types of noise. For the analysis of brake pad stiffness, is well known the compressibility equipment, which evaluates the deformation subject to a load in the axial direction. The first stage of the work proves that the compressive deformation of the pad has a non-linear behaviour as a function of the applied force. Based on this non-linearity, tests are carried out on 93 brake pads, where trends between the instantaneous deformation and the final compressibility result are sought. In the second step, we try to evaluate the stiffness of the friction material in the tangential direction, where a new method is proposed using the shear equipment, also well known in the brake industry. The ultimate goal is to correlate these stiffness parameters with natural frequencies from modal analysis, since it is a quick, inexpensive and non-destructive test to qualify brake pads.
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Citation
Suetti, A. and Correia, C., "Studies on Axial and Tangential Properties of Brake Pads," SAE Technical Paper 2017-36-0010, 2017, https://doi.org/10.4271/2017-36-0010.Also In
References
- Chiariotti P , Martarelli M , Santolini C and Tomasini E Diagnostic procedure on brake pad assembly based on Young's modulus estimation Measurement Science and Technology 10.1088/0957-0233/24/2/025602
- SAE International Surface Vehicle Recommended Practice Automotive Disc Brake Pad Natural Frequency and Damping Test SAE Standard J2598 Jul. 2012
- SAE International Surface Vehicle Recommended Practice Road vehicles - Brake linings - Compressibility test procedure SAE Standard J2468 Dec. 2006
- SAE International Surface Vehicle Recommended Practice Test Procedures for Shear Strength of Automotive Brake Pads and Brake Lining Assemblies SAE Standard J840 Jan. 2007
- Global-Spec Test Specification For Brake Friction Materials ISO/TC22/SC2 N557 Jan. 2000
- Continental Teves Product Specification Disc Brake Pads ATE N 543 27.00 Jan. 2000
- Avitabile P. Experimental Modal Analysis - A Simple Non-Mathematical Presentation University of Massachusetts Lowell http://www.sandv.com/downloads/0101avit.pdf
- ISO Recommended Practice Road vehicles - Brake linings - Shear test procedure for disc brake pad and drum brake shoe assemblies International Standard ISO 6312 2001
- Japanese Industrial Standard Shear Strength Test Procedure for Drum Brake Shoe Assemblies and Pads of Automobiles International Standard JIS D4422 1990