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Validation of Compressibility Test Systems for Friction Materials
- Ground Vehicle Standard
- J3079/1_202101
- Issued
Downloadable datasets available
Annotation ability available
Sector:
Issuing Committee:
Language:
English
Scope
This SAE Recommended Practice (RP) applies to the validation process for test systems used to measure deflection (compressibility, creep, or swell and growth) of friction materials and friction material assemblies. The materials or assemblies can fit passenger cars, light trucks, and commercial vehicles equipped with hydraulic or air brake systems, using disc or drum brakes.
Rationale
Within any acceptable quality assurance program, the systematic validation of the test system and gage repeatability and reproducibility (Gage R&R) are of primary importance. Manufacturing or product data is only as good as the instruments that evaluate processes or measure products. Therefore, it is of primary importance to ensure that measurement devices are adequate for the required measurements within a manufacturing control plan.
This SAE Recommended Practice (RP) uses three main steps:
-
a
Assessment of test system using a predefined checklist to verify main features and control capabilities with deflection profile evaluations.
-
b
Measurement of actual deflection using standard proving rings (also known as the standard judge and soft judge).
-
c
Gage R&R using actual pads following a pre-selection process.
Using test systems which satisfy the statistical limits and acceptance criteria established in this RP, in addition to any agreed-upon requirements between the testing system supplier and the test system user, provides a robust method to ensure valid and relevant test results.
This RP accompanies and supports the SAE Surface Vehicle Standards SAE J2468 and SAE J3079-2.
Topic
Data Sets - Support Documents
| Title | Description | Download |
|---|---|---|
| Unnamed Dataset 1 | ||
| Unnamed Dataset 2 | ||
| Table 1 | Symbols and definitions | |
| Table 2 | Minimum test system capabilities and specifications | |
| Unnamed Dataset 5 | ||
| Unnamed Dataset 6 | ||
| Unnamed Dataset 7 | ||
| Unnamed Dataset 8 | ||
| Unnamed Dataset 9 |
Issuing Committee
Brake Linings Standards Committee
The goal of the Brake Lining Standards Committee is to provide a means of developing and maintaining common test and nomenclature standards for the friction materials industry. In working toward this goal, the committee helps reduce industry costs, harmonize global markets and enhance safety by recommending uniform test and performance standards for automotive friction materials.
Reference
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