Testing Passenger Car Brake Pad Exploitation Time’s Impact on the Values of the Coefficient of Friction and Abrasive Wear Rate Using a Pin-on-Disc Method

Abstract

The braking system is one of the most important components in any motor vehicle. Its proper function in emergency situations may save road users’ lives. Today, as vehicles have more and more power at their disposal, leading to increased acceleration and maximum speed, the issue of effective braking is particularly important. It must also be noted that brakes are used in harsh conditions (water and salt, especially during winter), and must provide appropriate durability (on average, circa 30,000 km). For these reasons, many institutions conduct research aimed, among other things, at minimizing fading. However, this study looked into a different matter, focusing on how the operating conditions mentioned above, including the lifespan of brakes, impact the tribological properties of the friction pair. To achieve this, samples from brake pads were obtained (both brand new and used). Next, using a pin-on-disc tribological test, it was shown that the pads have lower coefficients of friction and abrasive wear rates. The results indicated that both parameters change in a manner that is dependent on how long the brake system has been in use.

Unrecognized volatile and semi-volatile organic compounds from brake wear

“…Brake pads contain a complex mixture of organic and inorganic components, with phenolic resins as a common and signicant constituent. 48,73,74 The synthesis of these resins oen involves diisocyanates and a tertiary amine, incorporating nitrogen and cyano groups into the brake pads. 43,45,75 Additives such as silicone, epoxy-and rubber resins are frequently included.…”

Development and Analysis of Friction Material for Eco-Friendly Brake Pad Using Seashell Composite

“…The results show the seashell base brake pad will compete favourably with the existing non-abestors based brake pads. The favourable competition with other brake pads could also be attributed to little or no cracks or voids attributed to thermal stress due to cyclic heating and cooling of the brake pads during wear test [31].…”

Pin-on-Plate vs. Pin-on-Disk Wear Tests: Theoretical and Numerical Observations on the Initial Transient Phase

“…In the literature, Equation ( 2) is used to estimate k from PoP and PoD wear tests, as reported in very recent experimental studies both on unilateral [4,[10][11][12] and bilateral [5,6,13] wear. However, Equation (2) holds only for a translating body under constant load, and thus while it is correct for PoP wear tests, it provides only an approximation of k for PoD tests where a relative rotation occurs.…”