Road vehicles - Brake linings - Shear test method for disc brake pad and drum brake shoe assemblies
1 Scope
This document describes the preparation of specimens, test devices and fixtures, test procedure, result calculation, and test report for the shear test method for disc brake pad and drum brake shoe assemblies.
This document is applicable to the determination of shear strength of vehicle disc brake pad and drum brake shoe assemblies that are integrally molded, bonded or use two types of fixed systems. This document is not applicable to the determination of shear strength of riveted vehicle brake pad (shoe) assembly.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 5620 Road vehicles - Vocabulary and definition for braking of automotive vehicles and their trailers
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 5620 and the following apply.
3.1
lining
friction material component in a brake assembly
3.2
bond area
contact area between the lining and the backing plate or shoe
3.3
shear strength
value obtained by total load applied in case of shear failure divided by the bonding area
4 Symbols
For the purposes of this standard, the symbols given in Table 1 apply.
Table 1 Symbols
Symbol Definition Unit
A Bond area mm²
F Shear force in case of failure N
τ Shear strength MPa
Foreword III
Introduction IV
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Preparation of specimens
6 Test devices and fixtures
7 Test procedure
8 Result calculation
9 Test report
Annex A (Informative) Test flow chart
Annex B (Informative) Format of test report
Bibliography
