Full-scale dynamometer test of composite railway brake shoes – study on the effect of the reinforcing fibre type

• Autorzy: Wasilewski P.

Identyfikatory

DOI

10.2478/ama-2018-0031

• Języki publikacji: EN

Abstrakty

EN

When designing or developing friction materials, it is crucial to predict how the modification of the formulation will affect their properties. Fibres are introduced in the composition of the phenolic-based brake friction materials to improve their mechanical strength. Apart from reinforcing the composite, fibres can also affect its tribological and thermophysical properties. In this study two composite friction materials are compared. The difference between the materials was the type of reinforcing fibre used in the formulation – in one case it was glass fibre, in the other steel fibre. Thermal diffusivity of both materials was measured and thermal conductivity was calculated. Frictional characteristics determined by means of full-scale dynamometer tests are analysed and discussed. Substitution of glass fibre with steel fibre led to increase in the friction coefficient. Maximum average temperature below wheel surface, observed during the test of the material containing steel fibre, was lower as compared to the test results of the material with glass fibre in its formulation, despite higher heat flux in the course of brake applications. Thermal conductivity of the friction material was enhanced by including steel fibre in the formulation.

Słowa kluczowe

EN

railway tread brake; friction material formulation; full-scale dynamometer test; thermal conductivity

• Wydawca: Oficyna Wydawnicza Politechniki Białostockiej
• Czasopismo: Acta Mechanica et Automatica
• Rocznik: 2018
• Tom: Vol. 12, no. 3
• Strony: 204--208
• Opis fizyczny: Bibliogr. 19 poz., rys., tab., wykr.

Twórcy

autor

Wasilewski P.

• Faculty of Mechanical Engineering, Department of Mechanics and Applied Computer Science, Bialystok University of Technology, ul. Wiejska 45C, 15-351 Bialystok, Poland
• SMiOC Frenoplast Bułhak i Cieślawski S.A., Research and Development Department, Korpele 75 – Strefa, 12-100 Szczytno, Poland

Bibliografia

• 1. Abbasi S., Teimourimanesh S., Vernersson T., Sellgren U., Olofsson U., Lundén R. (2014), Temperature and thermoelastic instability at tread braking using cast iron friction material, Wear, 314, 171–180.
• 2. Alnaqi A.A., Barton D.C., Brooks, P.C. (2015), Reduced scale thermal characterization of automotive disc brake, Applied Thermal Engineering, 75, 658–668.
• 3. Bijwe J. (1997), Composites as friction materials: Recent developments in non‐asbestos fiber reinforced friction materials – a review, Polymer composites, 18, 378–396.
• 4. Chan D.S.E.A., Stachowiak G.W. (2004), Review of automotive brake friction materials, Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 218, 953–966.
• 5. de Vos P. (2016), Noise in europe: State of the art report, Union Internationale des Chemins de fer, Paris.
• 6. Desplanques Y., Roussette O., Degallaix G., Copin R., Berthier Y. (2007), Analysis of tribological behaviour of pad–disc contact in railway braking: Part 1. Laboratory test development, compromises between actual and simulated tribological triplets, Wear, 262, 582–591.
• 7. European Commission (2013), Commission Regulation (EU) No 321/2013 concerning the technical specification for interoperability relating to the subsystem rolling stock freight wagons of the rail system in the European Union and repealing Decision 2006/861/EC (WAG TSI). Retrieved from http://eur-lex.europa.eu/legalcontent/EN/TXT/?qid=1437553513377&uri=CELEX:02013R0321- 20150701
• 8. European Railway Agency (2015), Friction elements for wheel tread brakes for freight wagons (ERA/TD/2013-02/INT v 3.0). Retrieved from http://www.era.europa.eu/Document-Register/ Documents/ERA-TD-2013-02-INT%203.0.pdf
• 9. Grzes P., Oliferuk W., Adamowicz A., Kochanowski K., Wasilewski P., Yevtushenko A.A. (2016), The numerical– experimental scheme for the analysis of temperature field in a paddisc braking system of a railway vehicle at single braking, International Communications in Heat and Mass Transfer, 75, 1–6.
• 10. Kim S.J., Cho M.H., Lim D.S., Jang H. (2001), Synergistic effects of aramid pulp and potassium titanate whiskers in the automotive friction material, Wear, 251, 1484–1491.
• 11. Konowrocki R., Kukulski J., Walczak S., Groll W. (2013), Dynamic interaction of cleansing brake insert for high speed train – experimental investigation, Prace Naukowe Politechniki Warszawskiej, Transport, 98, 279–289 (in Polish).
• 12. Krupa M. (2008), Influence of temperature on value of friction coefficient in friction brakes, Scientific Papers of Silesian University of Technology, Transport, 64, 151–157 (in Polish).
• 13. Petersson M., Vernersson T. (2002), Noise-related roughness on tread braked railway wheels-experimental measurements and numerical simulations, Wear, 253, 301–307.
• 14. Sim L., Ramanan S.R., Ismail H., Seetharamu K.N., Goh T.J. (2005), Thermal characterization of Al2O3 and ZnO reinforced silicone rubber as thermal pads for heat dissipation purposes, Thermochimica Acta, 430, 155–165.
• 15. Singh T., Patnaik A., Chauhan R., Rishiraj A. (2017), Assessment of braking performance of lapinus–wollastonite fibre reinforced friction composite materials, Journal of King Saud UniversityEngineering Sciences, 29, 183–190.
• 16. Union Internationale des Chemins de fer (2010), Brakes – Brakes with composite brake blocks – General conditions for certification of composite brake blocks (UIC Leaflet 541–4, 4th edition).
• 17. Wasilewski P. (2017), Experimental study on the effect of formulation modification on the properties of organic composite railway brake shoe, Wear, 390, 283–294.
• 18. Wasilewski P., Kuciej M. (2018), Comparative study on the effect of fibre substitution on the properties of composite railway brake shoe, Proceedings of the International Scientific Conference BALTTRIB’2017, 1, 172–177.
• 19. Yevtushenko A., Kuciej M., Grześ P., Wasilewski P. (2017),Temperature in the railway disc brake at a repetetive shortterm mode of braking, International Communications in Heat and Mass Transfer, 84, 102–109.

Uwagi

This work is part of the doctoral project no. MB/WM/20/2016 conducted at the Faculty of Mechanical Engineering, Bialystok University of Technology funded by Ministry of Science and Higher Education of Republic of Poland.