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<p>This study examines the effects of sliding speed, applied load, and rotational speed (RPM) on the coefficient of friction (COF) and abrasive wear of semi-metallic automotive brake pads using a pin-on-disc test rig. Results indicate an inverse correlation between COF and RPM, with COF decreasing 78% (0.51–0.112) as speed increased from 200 to 1000 RPM, primarily due to thermal effects and tribo-layer formation. Conversely, sliding velocity positively influenced COF, increasing 21.7% (0.637–0.775) from 0.4 to 0.8 m/s, enhancing the stability of the friction layer for consistent braking. Abrasive wear escalated with higher loads and speeds, increasing 234% (0.384–1.284 g/N) at 30 N and 179% (0.404–1.13 g·s/m) with velocity, indicating a shift to severe wear mechanisms. Findings highlight the role of SiC and MgO reinforced composites in improving wear resistance and maintaining stable COF in high-performance braking systems.</p>

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Effect of sliding velocity, load, and RPM on wear and friction in automotive brake pads

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年5月4日

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  • Mahmoud A. Essam,
  • Mohamed M. Faragallah,
  • Manar Magdy,
  • Noha M. Abdeltawab

摘要

This study examines the effects of sliding speed, applied load, and rotational speed (RPM) on the coefficient of friction (COF) and abrasive wear of semi-metallic automotive brake pads using a pin-on-disc test rig. Results indicate an inverse correlation between COF and RPM, with COF decreasing 78% (0.51–0.112) as speed increased from 200 to 1000 RPM, primarily due to thermal effects and tribo-layer formation. Conversely, sliding velocity positively influenced COF, increasing 21.7% (0.637–0.775) from 0.4 to 0.8 m/s, enhancing the stability of the friction layer for consistent braking. Abrasive wear escalated with higher loads and speeds, increasing 234% (0.384–1.284 g/N) at 30 N and 179% (0.404–1.13 g·s/m) with velocity, indicating a shift to severe wear mechanisms. Findings highlight the role of SiC and MgO reinforced composites in improving wear resistance and maintaining stable COF in high-performance braking systems.