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Thermo-mechanical analysis of functionally graded wheel-mounted brake disk

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Abstract

Having higher speed for trains requires improvement in braking performances. The brake system is an important part of locomotive safety system in which the mechanical energy is converted to the thermal energy and distributed through the disks and pads. As a result, the temperature at the disks surfaces increases sharply. This phenomenon is called the thermal shock that causes the negative effects on the brake disk surface such as fast aging, early wear, thermal cracks and the brake fade. Using Functionally graded materials (FGMs) which are more resistant to the thermal shock is a new trend to deal with this issue. In this study, the effects of using FG materials in the wheel-mounted brake disk R920K for the ER24PC locomotive on its thermo-mechanical behavior are investigated. For this purpose, the uncoupled thermo-mechanical analysis is performed for the disk made of FG Al-A359/SiCp, aluminum and ductile cast iron materials. Comparing the results of brake disk made of ductile cast iron with those from experimental data, the accuracy of present FE model is verified. Concerning the stress analysis, it is shown that the safety factor for the disk made of FG material is higher than the other ones. Furthermore, the gradation index of FG material has the most important effect on the thermo-mechanical performance of FG disks.

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Author information

Authors and Affiliations

  1. MAPNA Locomotive Company, Karaj, Iran

    Tohid Mahmoudi

  2. School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran

    Ali Parvizi

  3. Department of Mechanical Engineering, Faculty of Engineering, University of Zanjan, Zanjan, Iran

    Esmaeil Poursaeidi

  4. Faculty of Mechanical & Energy Engineering, Shahid Beheshti University, A.C., Tehran, Iran

    Abbas Rahi

Authors
  1. Tohid Mahmoudi
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  2. Ali Parvizi
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  3. Esmaeil Poursaeidi
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  4. Abbas Rahi
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Corresponding author

Correspondence to Ali Parvizi.

Additional information

Recommended by Associate Editor Seong Beom Lee

Tohid Mahmoudi is a manufacturing expert in Mapna Locomotive Company in Iran. He graduated in rolling stock engineering from the Iran University of Science and Technology in 2008. He received an M.Sc. in Mechanical Engineering at the University of Zanjan in 2013. His research activities are in the field of thermal and mechanical stress analysis of solid structures such as brake disk.

Ali Parvizi is an Assistant Professor at the School of Mechanical Engineering, Col-lege of Engineering, University of Te-hran (Iran). He received his Ph.D. in Mechanical Engineering at the University of Tehran (Iran) in 2011. His main research activities include theoretical, numerical and experimental analysis of bulk and sheet metal forming processes. Thermo-elasto-plastic analysis of structural elements made of FG materials as well as design and analysis of railway rolling stock system and components are his other research interests.

Esmaeil Poursaeidi is an Associate Professor of Mechanical Engineering, Uni-versity of Zanjan, Iran. He received his Ph.D. in mechanical engineering at the Tarbiat Modarres University (Iran). He is head of Ishrag Group, Research Group on Failure analysis & Life assessment and repairing Turbo-compressor components. His main activities include fracture mechanics and stress analysis by means of experimental and numerical analysis.

Abbas Rahi is an Assistant Professor at the Mechanical & Energy Engineering, Shahid Beheshti University (Iran). He received his Ph.D. in Mechanical Engineering at AmirKabir University of Technology (Iran). His main research activities include vibration analysis of structural elements using theoretical and experimental methods.

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Mahmoudi, T., Parvizi, A., Poursaeidi, E. et al. Thermo-mechanical analysis of functionally graded wheel-mounted brake disk. J Mech Sci Technol 29, 4197–4204 (2015). https://doi.org/10.1007/s12206-015-0914-3

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  • DOI: https://doi.org/10.1007/s12206-015-0914-3

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