also proposed that chopped
glass fibers increase friction-induced vibration due to an increase
in contact stiffness of the friction material surface due to thepresence oflargerplateausneartheshortglass fiber bundles.To
reduce thedisadvantagesofexcessivehightemperaturewearand
high noisegeneration,glass fibers areoftenblendedwithother
fibers , whileshortglass fibers arealsousedasabrasivesto
controlthefrictioncoefficient offrictionmaterials .