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Divergence of Thickness Losses and Weight Losses of Disc Pads for Passenger Cars: High-Copper NAOs and Copper-Free Low Mets
Technical Paper
2021-01-1290
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The current investigation was undertaken to find out if lighter-weight passenger car disc pads would exhibit wear behaviors similar to pickup truck pads and commercial heavy truck drum linings in terms of the permanent volume expansion of the friction material contact surface region. 2 high-copper NonAsbestos Organic formulations and 3 copper-free LowMet formulations were tested according to the SAE J2522 test procedure. In all cases, the measured pad thickness loss was found to be less than the thickness loss calculated from the weight loss, indicating pad volume expansion in the pad surface region, in full agreement with the results from the pickup truck and heavy trucks. The heataffected swollen/expanded layer ranges from 0.27 to 0.61 mm in thickness depending on the formula and test conditions. Due to the expansion, pad durability projections made from test results based on high temperature city traffic tests can result in underestimating the actual durability. Also, one needs to consider pad property changes associated with the volume expansion if good correlations are to be found between pad properties and brake friction, wear and NVH.
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Rathee, A., Singh, S., Sharma, D., and Rhee, S., "Divergence of Thickness Losses and Weight Losses of Disc Pads for Passenger Cars: High-Copper NAOs and Copper-Free Low Mets," SAE Technical Paper 2021-01-1290, 2021, https://doi.org/10.4271/2021-01-1290.Data Sets - Support Documents
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| Unnamed Dataset 1 |
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References
- Sriwiboon , M. , Tiempan , N. , Kaewlob , K. , and Rhee , S.K. Non-Asbestos Organic (NAO) Disc Pad Wear Behavior: Divergence of Thickness Loss and Weight Loss SAE Technical Paper 2018-01-1866 2018 https://doi.org/10.4271/2018-01-1866
- Rathee , A. , Sharma , D.K. , Singh , S. , and Rhee , S.K. Divergence of Thickness Loss vs. Weight Loss, Friction and Wear Behavior of Heavy Truck Brake Blocks: Development of a New Test Procedure for the Chase Tester SAE Technical Paper 2019-01-2107 https://doi.org/10.4271/2019-01-2107
- Sriwiboon , M. , Tiempan , N. , Kaewlob , K. , and Rhee , S.K. Disc Pad Physical Properties vs. Porosity: The Question of Compressibility as an Intrinsic Physical Porperty SAE Int. J. Mater. Manf. 11 1 March 2018 57 78 https://doi.org/10.4271/05-11-01-0007
- Sriwibbon , M. , Rhee , S. , Kaewlob , K. , Tiempan , N. et al. A Study of Pad Properties vs. Friction, Wear and Brake Squeal: Processing and Porosity Effects SAE Int. J. Mater. Manf. 10 1 2017 https://doi.org/10.4271/2016-01-1915.%205%5d%20M
- Sriwiboon , N. , Tiempan , K. , and Rhee , S.K. Influence of Formulation and Process Modifications on Brake Friction, Wear and Squeal: Low-Copper NAOs and Importance of Disc Wear SAE Technical Paper 2014-01-2482 2014 https://doi.org/10.4271/2014-01-2482
- Lee , S. , Jeon , J. , Jeong , J. , Park , B. et al. Disc Brake Squeal vs. Disc Pad Compressibility-Stiffness Interactions: Low-Frequency Squeal and High-Frequency Squeal vs. Differential Pad Wear SAE Technical Paper 2017-01-2528 2017 https://doi.org/10.4271/2017-01-2528
- Sriwibbon , M. , Tiempan , N. , Kaewlob , K. , and Rhee , S.K. Changing Properties of Brake Pads and Discs during Brake Testing SAE Technical Paper 2020-01-1628 https://doi.org/10.4271-2020-01-1628
- Sriwiboon , M. , Rhee , S.K. , Kaewlob , K. , and Tiempan , N. Aging Effect on Disc Pad Properties SAE Technical Paper 2019-01-2108 https://doi.org/10.4271/2019-01-2108