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Road Vehicles - Friction Materials - Elastic Properties Measurements
- Ground Vehicle Standard
- J2725_201709
- Revised
Downloadable datasets available
Annotation ability available
Sector:
Issuing Committee:
Language:
English
Scope
This SAE Standard specifies a method for testing and measuring elastic constants in friction materials by precise ultrasonic velocity measurements. Measurement methods are also described for measurement of the out-of-plane modulus as a function of pre-load as well as the measurement of engineering constants as a function of temperature. Finally, methods are formulated to produce all engineering constants as a function of pre-load and temperature.
Rationale
This SAE Standard specifies a method for testing and measuring elastic constants in friction materials by precise ultrasonic velocity measurements. This specification has been modified to include the measurement of the out-of-plane modulus as a function of pre-load as well as the measurement of engineering constants as a function of temperature. Finally, methods are formulated to produce all engineering constants as a function of pre-load and temperature.
Recommended Content
| Ground Vehicle Standard | Thermal Transport Properties Germane to Friction Materials and Brakes |
| Ground Vehicle Standard | High-Preload Deflection and Compressibility Test Procedures for Friction Materials |
| Ground Vehicle Standard | Swell, Growth, and Dimensional Stability of Friction Materials and Noise Insulators when Exposed to Elevated Temperatures |
Topic
Data Sets - Support Documents
| Title | Description | Download |
|---|---|---|
| Table 1 | Symbols and units | |
| Table 2 | Raw transit time data | |
| Table 3 | Summary data for ultrasonic measurements | |
| Table 3 | Summary data for ultrasonic measurements | |
| Table 4 | Pre-load dependence of velocity and elastic constants | |
| Table 5 | Temperature dependent velocity and modulus data | |
| Table 5 | Temperature dependent velocity and modulus data |
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
| Number | Title |
|---|---|
| 2006-01-3193 | Non-linear Aspects of Friction Material Elastic Constants |
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