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BRAKE/FRICTION MATERIALS TEST SYSTEM

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During developing brake pad materials to be used for automotive/train  brake applications, it is aimed to formulate including the materials that address cost reduction, expected (usually more demanding) performance and compliance with new safety and environmental regulations. Determination of the tribological behavior of brake pads and other friction materials under real environmental conditions is an important and critical task which can significantly impact the automotive/railway  industry. In braking test applications and testing of friction materials for brake applications, full-scale or reduced-scale dynamometers  are generally used. But such tests include a cost- and time-intensive method because they requires the rotor and brake pads to be in their final form. UTS Scientific Inc. has developed a cost-effective and fast screening method and rank materials before performing the component level evaluation. With this system, it is easy to characterize the tribological performance of friction material on small-scale samples in precise and timely manner. Some kay parameters such as sliding speed, friction, wear, and temperature is mentored during testing. 


The test system can be utilized for testing brake pad materials in specifically but all friction materials in generally.  The system can be programmed industry-standard dynamometer protocols and other specific standards. The test parameters as friction force, coefficient of friction, sliding speed, sliding/running distance, temperature, wear depth can be adjusted, detected and monitored initial, during and after each tests.  This system gives  very good correlation to tests performed on the full-scale dynamometer following the same standards.


Along with controlling of sliding speed, temperature of the pad, temperature of the rotor, torque and coefficient of friction, controlling environmental parameters, like temperature and relative humidity are also possible.


Also the test system allows collecting the debris released from the sliding contact interfaces during the test. Such debris can then be used for physical and chemical characterizations.


Brake pad samples are pressed against the steel disc, applying loads that simulate contact pressures employed in the SAE J661 protocol. Again, since a benchtop scale system has a very low inertia in comparison with the dynamometer, the deceleration precisely controlled at the motor, using similar stopping-time values to those collected from the full-scale test.


UTS Brake pad/friction materials tester utilizes user-friendly, programmable, script-based software to enable users to simulate a wide range of different modes:


    Constant deceleration test mode

    Constant velocity (drag) test mode

    Brake material friction coefficient  as a function of  «disc velocity» – «brake pas sample temperature» – «contact pressure»

    Effect of humidity on brake material behavior

    Fade and recovery protocols


 

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