Frictional Characterization Of Grey Cast Iron Train Brake Block Using A Reduced Scale Dynamometer

Bernardus Prasetya Utama, Herru Santoso Budiono, Eko Surojo, Nurul Muhayat

Abstract

The brake block is an important component that serves to slow down and stop the train. The safety of this transportation is very dependent on the reliability of this component. One of the important features of the brake block material is the coefficient of friction. The coefficient of friction of the brake block material must meet and match the requirements. The coefficient of friction of a material is measured using a friction test. Previous studies have shown that the friction coefficient of a material is influenced by braking conditions, namely contact pressure and friction speed. Many friction testing methods have been developed to study the characteristics of friction materials.  In contrast to previous studies, in this study, the frictional characteristics of gray cast iron brake blocks were evaluated using a reduced scale dynamometer. The friction test is carried out by pressing the brake block specimen to the surface of the rotating wheel. The specimen size of the brake block and carriage wheels is reduced to 1/4 of the original size. The friction test is carried out at a contact pressure of 0.15,  0.20, 0.25, and 0.30 (MPa) and the friction speeds of 3, 6, 9, and 12 (m/s). The results of this study indicate that the coefficient of friction of the gray cast iron brake block decreases with increasing friction speed and contact pressure.

Full Text:

PDF

References

  1. Y. A. Rokhim, E. Surojo, N. Muhayat, and W.W. Raharjo, "Frictional Characteristic Evaluation of Composite Brake Block Using A Reduced-Scale Brake Dynamometer," Proceedings of the 6th International Conference and Exhibition on Sustainable Energy and Advanced Materials, pp. 61–67, 2015.
  2. R.A. Bukhori, E. Surojo, and N. Muhayat, "Design of A Reduced-Scale Dynamometer For Testing Friction Characteristics Of Railway Brake Block Materials (in Indonesian)," Jurnal Nasional Teknologi Terapan (JNTT), Vol. 2(3), pp. 321–333, 2019.
  3. G. Cueva, A. Sinatora, W.L. Guesser, and A.P. Tschiptschin, "Wear Resistance of Cast Irons Used in Brake Disc Rotors," Wear, Vol. 255(7–12), pp. 1256–1260, 2003.
  4. M.R.K. Vakkalagadda, D.K. Srivastava, A. Mishra, and V. Racherla, "Performance Analyses of Brake Blocks Used by Indian Railways," Wear, Vol. 328–329, pp. 64–76, 2015.
  5. I.T. Maulana, E. Surojo, N. Muhayat, and W.W. Raharjo, "Frictional Characteristics of Friction Brake Material Using Cantala Fibers as Reinforcement," Tribology Online, Vol. 13(4), pp. 188–194, 2018.
  6. M. Pellizzari and G. Cipolloni, "Tribological Behaviour of Cu Based Materials Produced by Mechanical Milling/Alloying and Spark Plasma Sintering, Wear, Vol. 376–377, pp. 958–967, 2017.
  7. J. Li, J. Wongsa-Ngam, J. Xu, D. Shan, B. Guo, and T.G. Langdon, "Wear Resistance of an Ultrafine-Grained Cu-Zr Alloy Processed by Equal-Channel Angular Pressing," Wear, Vol. 326–327, pp. 10–19, 2015.
  8. I. Kurniawan, "Micro Structure and Wear of Al-SiC Rail Brake Blocks Based on Material Composition (in Indonesian)," Info Teknik Mesin, Vol. 7, pp. 13–18, 2014.
  9. L.D. Setyana, "Study of Gray Cast Iron Graphite Size Against Wear Rate on Metallic Rail Brake Block Products (in Indonesian)," Jurnal Material Teknologi Proses, Vol. 1(1), pp. 19–24, 2015.
  10. B. Prasetya and M. Zainuri, "Effect of Waru Fiber Weight Fraction on Mechanical Properties of Non Asbestos Composite Rail Brake Pads (in Indonesian)," Jurnal Sains dan Seni ITS, Vol. 6(2), pp. 2–7, 2017.
  11. H.W. Septriana, G.D. Haryadi, and M. Ariyanto, "Manufacture And Testing Of Temperature Measuring Devices On Two-Wheel Vehicle Drum Brakes With Remote Measuring System (in Indonesian)," Jurnal Teknik Mesin Universitas Diponegoro, Vol. 5(1), pp. 66–72, 2017.
  12. M. Fauzan and G.D. Haryadi, "The Effect of Variations in Engine Speed and Braking Time on Temperature and Friction Coefficient On Brake Pads Using Remote Monitoring System Based Test Equipment (in Indonesian)," Jurnal Sains dan Seni ITS, Vol. 4(1), pp. 17–24, 2016.
  13. P.J. Blau and J.C Mclaughlin, "Effects of Water Films and Sliding Speed on the Frictional Behavior of Truck Disc Brake Materials," Tribology International, Vol. 36, pp. 709–715, 2003.
  14. J. Bao, Z. Zhu, M. Tong, Y. Yin, and Y. Peng, "Influence of Braking Pressure on Tribological Performance of Non-Asbestos Brake Shoe for Mine Hoister during Emergency Braking," Industrial Lubrication and Tribology, Vol. 64(4), pp. 230–236, 2012.
  15. D. Severin and S. Dörsch, "Friction Mechanism in Industrial Brakes," Wear, Vol. 249(9), pp. 771–779, 2001.

DOI: https://doi.org/10.20961/mekanika.v21i1.48246

Refbacks

  • There are currently no refbacks.