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Research into the Fundamentals of Friction in an Automotive Brake system

Research into the Fundamentals of Friction in an Automotive Brake system. Organic brake pads apply clamping force normal to the surface of the rotor via a hydraulic piston Normal force between two solid in relative motion produce friction

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Research into the Fundamentals of Friction in an Automotive Brake system

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  1. Research into the Fundamentals of Friction in an Automotive Brake system • Organic brake pads apply clamping force normal to the surface of the rotor via a hydraulic piston • Normal force between two solid in relative motion produce friction • Automotive brake systems utilize this concept to control and stop vehicle motion with operator input to a hydraulic system

  2. Contact within Pad/Rotor Brake system • Primary contact plateaus initiate real area of contact (50 – 500 μm) • Secondary plateaus develop as debris is collected between primary plateaus

  3. Load Effects on Contact Larger pressure (normal force) between pad and rotor produce: • More contact plateaus • Increasing real area of contact • Increase frictional resistance

  4. Thermo Influence in Brakes Distortion can reduce actual contact Variation in coefficient of friction due to: • Material’s surface property variation • Oxide lubrication

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