Effects of Pad Surface Topography on Disc Brake Squeal

Effects of Pad Surface Topography on Disc Brake Squeal

Brake squeal has always been a major NVH problem to many car makers due to significant number of warranty claims. Brake squeal is a high frequency noise (above 1 kHz) emanating from car disc brakes that get excited due to one or more mechanisms such as mode coupling, stick-slip, hammering and sprag-...

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Veröffentlicht in:Applied Mechanics and Materials 2012-01, Vol.165, p.58-62
Hauptverfasser: Mat Lazim, Ahmad Razimi, Abdul Hamid, Mohd Kameil, Abu Bakar, Abd Rahim
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Abu Bakar, Abd Rahim
description Brake squeal has always been a major NVH problem to many car makers due to significant number of warranty claims. Brake squeal is a high frequency noise (above 1 kHz) emanating from car disc brakes that get excited due to one or more mechanisms such as mode coupling, stick-slip, hammering and sprag-slip. This paper attempts to investigate the effects of brake pad surface topography on squeal generation. Two pairs of a non-asbestos organic (NAO) brake pad will be tested on a brake dynamometer test rig. Surface topography of the brake pad will be analyzed through microscopic techniques using energy dispersive X-ray analysis (EDX), and optical microscope.
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