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N. Ouhbi^1,2, C. Voivret², G. Perrin³ and J.-N. Roux¹

¹Laboratoire Navier, CNRS, Ecole des Ponts Paristech, IFSTTAR, Champs-sur-Marne, France
²Innovation and Research Department, SNCF, Paris, France
³CEA/DAM/DIF, Arpajon, France

doi:10.4203/ccp.110.31

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N. Ouhbi, C. Voivret, G. Perrin, J.-N. Roux, "Railway Ballast: An Innovative Approach to understanding the Influence of Particle Shape on Mechanical Performance", in J. Pombo, (Editor), "Proceedings of the Third International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 31, 2016. doi:10.4203/ccp.110.31

Keywords: railway ballast, particle shape, mechanical performances, discrete element method, proper orthogonal decomposition, polyhedron.

Summary

To face the industrial challenge posed to the French National railway company (SNCF), a good understanding of ballast mechanical behaviour is necessary. As with grain size and mineralogy, grain shape has a significant influence on mechanical performance. The study, presented in this paper, aims to provide an understanding of this influence by means of numerical simulations using the discrete element method and the LMGC90 software, with ballast aggregates represented as irregular polyhedrons. This paper focuses on two important steps performed in this study: an innovative model allowing a relevant characterization of the shape, and a robust method to generate a set of virtual grains that are morphologically representative of real ballast grains. The results are discussed and some preliminary numerical simulations are presented.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 110 PROCEEDINGS OF THE THIRD INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 31 Railway Ballast: An Innovative Approach to understanding the Influence of Particle Shape on Mechanical Performance N. Ouhbi^1,2, C. Voivret², G. Perrin³ and J.-N. Roux¹ ¹Laboratoire Navier, CNRS, Ecole des Ponts Paristech, IFSTTAR, Champs-sur-Marne, France ²Innovation and Research Department, SNCF, Paris, France ³CEA/DAM/DIF, Arpajon, France doi:10.4203/ccp.110.31 purchase the full-text of this paper Full Bibliographic Reference for this paper N. Ouhbi, C. Voivret, G. Perrin, J.-N. Roux, "Railway Ballast: An Innovative Approach to understanding the Influence of Particle Shape on Mechanical Performance", in J. Pombo, (Editor), "Proceedings of the Third International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 31, 2016. doi:10.4203/ccp.110.31 Keywords: railway ballast, particle shape, mechanical performances, discrete element method, proper orthogonal decomposition, polyhedron. Summary To face the industrial challenge posed to the French National railway company (SNCF), a good understanding of ballast mechanical behaviour is necessary. As with grain size and mineralogy, grain shape has a significant influence on mechanical performance. The study, presented in this paper, aims to provide an understanding of this influence by means of numerical simulations using the discrete element method and the LMGC90 software, with ballast aggregates represented as irregular polyhedrons. This paper focuses on two important steps performed in this study: an innovative model allowing a relevant characterization of the shape, and a robust method to generate a set of virtual grains that are morphologically representative of real ballast grains. The results are discussed and some preliminary numerical simulations are presented. purchase the full-text of this paper (price £22) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £85 +P&P)
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