Friction Related Vibration and Noise

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Friction Related Vibration and Noise

• Peter Filip
• CAFS SIU Carbondale
• filip_at_siu.edu
• http//frictioncenter.engr.siu.edu

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Role of Friction Material
The SQUEAL !!!
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Role of Friction Material
Removal of Friction Layer !!!
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Role of Friction Material
The QUIET !!!
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The Bulk and the Friction Surface of Pad
100 ?m
Bulk
Friction Surface
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Properties of the Friction Layer
500 ?m
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Differences in Local Chemistry

• 3.01?a
• H 0.3GPa

• 9.3?a
• H 1.6 GPa

30 ?m
30 ?m
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High Frequency Squeal
?2???1
500 ?m
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Friction Surface Formulation 1
Noisy
Quiet
Ra7.16 Rq14.16
Ra1.67 Rq2.97
400µm
400µm
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Formulation 2n
Noisy
Quiet
Ra4.56 Rq7.12
Ra2.43 Rq3.16
400µm
400µm
400µm
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Recommended Approach