GB/T 22311-2008 in English

《GB/T 22311-2008道路车辆 制动衬片 压缩应变试验方法》由609（中国建筑材料联合会）归口，TC406（全国非金属矿产品及制品标准化技术委员会）执行，主管部门为中国建筑材料联合会。
本标准规定了道路车辆盘式制动衬块总成、鼓式制动蹄总成及无背板摩擦材料的制动衬片压缩应变的试验方法。制动衬片压缩应变是评价转移制动液体积、制动踏板运动和颤抖或噪音的倾向的重要设计参数。

1 Scope

This standard specifies a method for test and measurement of the compressive strain of brake linings which is applicable to road-vehicle disc-brake pad assemblies, drum-brake shoe assemblies and friction materials without a backing plate.

2 Normative References

The following normative document contains provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent edition of the normative document indicated below. For undated references, the latest edition of the normative document referred to applies.

GB/T 5620 Road Vehicles — Braking of Automotive Vehicles and Their Trailers — Vocabulary (GB/T 5620-2002, ISO 611:1994, IDT)

3 Terms and Definitions

For the purposes of this standard, the terms and definitions given in GB/T 5620 and the following definitions apply.

3.1
compressive strain
ratio of the reduction in thickness of the brake lining, due to compressive forces and temperatures, to its initial thickness (measured in the direction of the application force, perpendicular to the friction surface)

4 Symbols and Units

Table 1 gives the symbols and corresponding units used in this standard.

Foreword II
ISO Foreword III
Introduction IV
1 Scope
2 Normative References
3 Terms and Definitions
4 Symbols and Units
5 Principle
6 Test Equipment
7 Test-rig Specifications
8 Sampling
9 Procedure
10 Test-device Deflection Compensation
11 Report
Annex A (Normative) Test Procedure Flow Diagram
Annex B (Informative) Test Parameter Record and Results Summary