FRICTION PROPERTIES OF CARBON-CARBON COMPOSITE AIRCRAFT BRAKES AT DIFFERENT INITIAL BRAKING SPEEDS AND PRESSURE

摘要

The friction properties of B757 and A320, manufactured by Xi'an ChaoMa Technology Co.Ltd, Dunlop Co. of England and Carbon Industry Co. of France, were investigated at different initial braking speeds and pressure with HJDS-II simulating tester and MM-1000 frictional tester. It was shown that energy and torque of all brakes increase with the increase of initial braking speeds and pressure, moreover the increased tendency are almost similarly. Their friction coefficients have a low energy maximum at low speeds and pressure, then decrease with the increase of initial braking speeds and pressure. The friction coefficients of A320 brakes made by Xi'an ChaoMa Technology Co.Ltd are higher than the foreign brakes at high braking speeds and braking pressure.