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Keywords: track structure, finite-element method, stress, Abaqus, grid.

Summary

This paper presents selected numerical calculations for a reinforced track substructure and various static and dynamic loads. The final output is the stresses and strains. A track substructure with a crushed stone BGT composite, is a design for a reinforced standard track substructure, developed by the research team of the Warsaw University of Technology Department of Transport Infrastructure. The author created three dimensional models for the reinforcement of a standard track substructure with a crushed stone BGT composite. The structural models and numerical calculations were made using Abaqus, a software with extensive capabilities for non-linear analysis of physical issues, including mechanics of deformable solids.

Numerical calculations provide information on the magnitude and distribution of loading and strain. A location of extreme stress values around the periphery and inside the structure may be determined based on the results. The simulation calculations will be used to determine the strength properties of suggested track substructure reinforcement at various static and dynamic loads.

The results show the need to continue the simulation, and further improvement of the numerical model. A several versions of the calculations simulating various surface load cases, both static and dynamic were conducted. Several load simulations were conducted, and selected results are presented in this paper.

The extreme stresses are present at the wheel-rail interface. With an increase in the number of load cycles, a gain in stress and strain is observed, although at this stage, the values are very small and do not affect the strength properties of the crushed stone composite components. The results are derived from initial tests of a track superstructure reinforced with a single geogrid only.

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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: 98 PROCEEDINGS OF THE FIRST INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 146 Selected Numerical Calculations for a Reinforced Track Substructure Subject to Various Static and Dynamic Loads J. Kukulski Faculty of Transport, Warsaw University of Technology, Poland doi:10.4203/ccp.98.146 purchase the full-text of this paper Full Bibliographic Reference for this paper J. Kukulski, "Selected Numerical Calculations for a Reinforced Track Substructure Subject to Various Static and Dynamic Loads", in J. Pombo, (Editor), "Proceedings of the First International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 146, 2012. doi:10.4203/ccp.98.146 Keywords: track structure, finite-element method, stress, Abaqus, grid. Summary This paper presents selected numerical calculations for a reinforced track substructure and various static and dynamic loads. The final output is the stresses and strains. A track substructure with a crushed stone BGT composite, is a design for a reinforced standard track substructure, developed by the research team of the Warsaw University of Technology Department of Transport Infrastructure. The author created three dimensional models for the reinforcement of a standard track substructure with a crushed stone BGT composite. The structural models and numerical calculations were made using Abaqus, a software with extensive capabilities for non-linear analysis of physical issues, including mechanics of deformable solids. Numerical calculations provide information on the magnitude and distribution of loading and strain. A location of extreme stress values around the periphery and inside the structure may be determined based on the results. The simulation calculations will be used to determine the strength properties of suggested track substructure reinforcement at various static and dynamic loads. The results show the need to continue the simulation, and further improvement of the numerical model. A several versions of the calculations simulating various surface load cases, both static and dynamic were conducted. Several load simulations were conducted, and selected results are presented in this paper. The extreme stresses are present at the wheel-rail interface. With an increase in the number of load cycles, a gain in stress and strain is observed, although at this stage, the values are very small and do not affect the strength properties of the crushed stone composite components. The results are derived from initial tests of a track superstructure reinforced with a single geogrid only. purchase the full-text of this paper (price £20) 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 £110 +P&P)
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