Relevant bibliographies by topics / Rail contact

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Rail contact'

Author: Grafiati
Published: 4 June 2021
Last updated: 25 July 2025

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Journal articles on the topic "Rail contact"

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Chen, Zhi Wei, Linan Li, Shi Gang Sun, and Jun Long Zhou. "Wheel-Rail Multi-Point Contact Method for Railway Turnouts." Applied Mechanics and Materials 97-98 (September 2011): 378–81. http://dx.doi.org/10.4028/www.scientific.net/amm.97-98.378.

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A calculation method of wheel-rail multi-point contact based on the elastic contact model is introduced. Moreover, the simulation calculation of vehicles passing through branch lines of No.18 turnouts is carried out. The result showed that the acute change of wheel-rail normal force caused by the transfers of wheel-rail contact point between two rails can be avoid by wheel-rail multi-point contact method, and the transfers of wheel-rail normal force between two rails is smoother. The validity of wheel-rail multi-point contact method is verified.
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Ma, Xiaochuan, Ping Wang, Jingmang Xu, and Rong Chen. "Effect of the vertical relative motion of stock/switch rails on wheel–rail contact mechanics in switch panel of railway turnout." Advances in Mechanical Engineering 10, no. 7 (2018): 168781401879065. http://dx.doi.org/10.1177/1687814018790659.

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In order to enable the vehicle to change among the tracks, the stock and switch rails are separated and provided with different rail resilience levels on the baseplate in the railway turnout switch panel. Therefore, there will be vertical relative motion between stock/switch rails under wheel loads, and the relative motion will change the combined profile of stock/switch rails and consequently affect the wheel–rail contact mechanics. A method is developed in this article to investigate the effect of the relative motion of stock/switch rails on the wheel–rail contact mechanics along the railway
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Kumar, S., and S. P. Singh. "Rail Head Geometry, Rail Rolling and Wheel-Rail Contact Tilting Analysis for Heavy Axle Loads." Journal of Engineering for Industry 111, no. 4 (1989): 375–81. http://dx.doi.org/10.1115/1.3188775.

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This paper presents analytical considerations which are important to design a rail head for reducing rail damage due to heavy axle loads. There are two important parameters of design of rail crown: (1) the wheel tread rail crown contact stress and (2) the contact tilt angle called the β angle. Contact should not be allowed to move out of the rail crown. Analysis of lateral oscillations of new and worn wheel sets shows that they do not impose an engineering constraint on the choice of rail crown radius. Rail rolling on curves due to lateral creepage forces is however of great importance in rail
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Seo, Jung Won, Hyun Kyu Jun, Seok Jin Kwon, and Dong Hyeong Lee. "Rolling Contact Fatigue and Wear Behavior of Rail Steel under Dry Rolling-Sliding Contact Condition." Advanced Materials Research 891-892 (March 2014): 1545–50. http://dx.doi.org/10.4028/www.scientific.net/amr.891-892.1545.

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Rolling contact fatigue and wear of rails are inevitable problems for railway system due to wheel and rail contact. Increased rail wear and increased fatigue damage such as shelling, head check, etc. require more frequent rail exchanges and more maintenance cost. The fatigue crack growth and wear forming on the contact surface are affected by a variety of parameters, such as vertical and traction load, friction coefficient on the surface. Also, wear and crack growth are not independent, but interact on each other. Surface cracks are removed by wear, which can be beneficial for rail, however to
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Li, Yang, JinJie Chen, JianXi Wang, Hu Zhao, and Long Chen. "Study on the residual stress distribution of railway rails." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 234, no. 23 (2020): 4682–94. http://dx.doi.org/10.1177/0954406220927069.

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Rolling contact fatigue damage of rails is significantly influenced by residual stresses. A three-dimensional elastic-plastic finite element model of wheel–rail contact was established in the present study, and the influence of initial stresses resulting from rail manufacturing process on the residual stress distribution of rails was analyzed. The repeated rolling passes were simulated and the stable residual stress distribution of rails was obtained. The influence of factors, such as wheel load, friction coefficient, and longitudinal creep rate, on the residual stress distribution of rails wa
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Zhou, Jian Hua, Yu Ji, An Chao Ren, and You Deng Zhang. "Analysis of the Generation Cause of Scale Shelling Defects on Running Surface of 60kg/m U71Mn Rail." Advanced Materials Research 291-294 (July 2011): 1062–68. http://dx.doi.org/10.4028/www.scientific.net/amr.291-294.1062.

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There were different degree scale shelling defects on running surface of 60kg/m U71Mn rail after used on the curve for a period of time, the characteristics and the generating reasons of the defects were analyzed, and the improvement measures were presented. There test results indicated that the scale shelling defects found on rail running surface were a sort of typical rolling contact fatigue damage, which caused mainly by the excessive contact stress, as a result of the wheel long-term contact with rail on the gauge corner of the rail on curve. It is effective to prevent and reduce rolling c
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Haydar, Luna, Florent Loete, Frédéric Houzé, Karim Slimani, Fabien Guiche, and Philippe Testé. "Influence of the Oxide Layer Thickness on the Behavior of the Electrical Wheel–Rail Contact in Static Conditions." Applied Sciences 15, no. 1 (2025): 471. https://doi.org/10.3390/app15010471.

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To manage and ensure the safety of traffic on rail networks, trains need to be reliably located at all times. This is achieved in many countries by electrically detecting their presence using so-called “track circuits” installed at regular intervals on each track, designed to detect when the wheels and axles of a train are shunting the two rails and to act accordingly on the signaling system. Such a detection principle is highly dependent on the quality of the electrical contacts between rails and wheels; the occurrence of high wheel–rail contact resistances can induce malfunctions known as “d
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Wei, Kai, Rui Ying Chen, and Yu De Xu. "Rail Profile Wear on Curve and its Effect on Wheel-Rail Contact Geometry." Advanced Materials Research 779-780 (September 2013): 655–59. http://dx.doi.org/10.4028/www.scientific.net/amr.779-780.655.

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The paper has carried out continued tests on a curve of a heavy haul railway in China for its rail profiles. Based on the data, the paper has counted the development of the rail profile wear, and then analyses the influence of wheel-rail contact geometry on the rail profile wear. The results show that the wear of high rails develops around the rail corners, while the one of low rails around the rail top. The development of the rail wear speeds up after the transport mass passes 210MGT. The wheel-rail contact geometry deteriorates when the transport mass grows up to 60MGT and lower than 210MGT.
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Choi, Jung-Youl, and Jae-Min Han. "Deep Learning (Fast R-CNN)-Based Evaluation of Rail Surface Defects." Applied Sciences 14, no. 5 (2024): 1874. http://dx.doi.org/10.3390/app14051874.

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In current railway rails, trains are propelled by the rolling contact between iron wheels and iron rails, and the high frequency of train repetition on rails results in a significant load exertion on a very small area where the wheel and rail come into contact. Furthermore, a contact stress beyond the allowable stress of the rail may lead to cracks due to plastic deformation. The railway rail, which is the primary contact surface between the wheel and the rail, is prone to rolling contact fatigue cracks. Therefore, a thorough inspection and diagnosis of the condition of the cracks is necessary
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Chen, Rui Ying, Kai Wei, and Yu De Xu. "Simulation Analysis on Wheel and Groove Rail Contact Position." Advanced Materials Research 779-780 (September 2013): 607–10. http://dx.doi.org/10.4028/www.scientific.net/amr.779-780.607.

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A vehicle-rail dynamic model is established and the calculated results are verified with trace method. And under the conditions of a same curve section, simulations are made on the contact position of groove rail and standard rail. Variation of contact points and contact area are analyzed. Furthermore, comparisons are made on the two rails with different lateral displacements.
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Dissertations / Theses on the topic "Rail contact"

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McNeal, Cedric J. "Barrel wear reduction in rail guns : the effects of known and controlled rail spacing on low voltage electrical contact and the hard chrome plating of copper-tungsten rail and pure copper rails /." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Jun%5FMcNeal.pdf.

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Thesis (M.S. in Applied Physics)--Naval Postgraduate School, June 2003.<br>Thesis advisor(s): William B. Maier II, Richard Harkins. Includes bibliographical references (p. 45-46). Also available online.
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Smith, Lindsey. "Rolling contact fatigue in wheel-rail contact." Thesis, University of Newcastle Upon Tyne, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.438385.

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Zhu, Yi. "Adhesion in the wheel-rail contact." Doctoral thesis, KTH, Tribologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-133342.

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To attract more customers and compete with other modes of transportation, railway transport needs to ensure safety, punctuality, high comfort, and low cost; wheel–rail adhesion, i.e., the transmitted tangential force in the longitudinal direction during driving and braking, plays an important role in all these aspects. Adhesion needs to be kept at a certain level for railway operation and maintenance. However, wheel−rail contact is an open system contact. Different contaminants can present between the wheel and rail surfaces, forming a third-body layer that affects the adhesion. Prediction of
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Saulot, Aurélien Berthier Yves Descartes Sylvie. "Analyse tribologique du contact roue-rail." Villeurbanne : Doc'INSA, 2006. http://docinsa.insa-lyon.fr/these/pont.php?id=saulot.

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Galas, Radovan. "Friction Modification within Wheel-Rail Contact." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-367508.

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Předložená disertační práce se zabývá experimentálním studiem modifikátorů tření a maziv pro temeno kolejnice, které jsou aplikovány do kontaktu kola a kolejnice za účelem optimalizace adheze a redukce hluku. Hlavním cílem práce bylo objasnit vliv aplikovaného množství a složení těchto látek na adhezi v kontaktu. Hlavní pozornost byla věnována zejména potencionálním hrozbám souvisejících s kriticky nízkou adhezí, která může nastat po aplikaci těchto látek. Experimentální studium probíhalo v laboratorních i reálných podmínkách, konkrétně v tramvajovém provozu. V případě laboratorních experiment
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Pang, Tao, and tony_pang@hotmail com. "Studies on Wheel/Rail Contact – Impact Forces at Insulated Rail Joints." Central Queensland University. Centre for Railway Engineering, 2008. http://library-resources.cqu.edu.au./thesis/adt-QCQU/public/adt-QCQU20080410.154708.

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To investigate the wheel/rail contact impact forces at insulated rail joints (IRJs), a three-dimensional finite element model and strain gauged experiments are employed and reported in this thesis. The 3D wheel/rail contact-impact FE model adopts a two-stage analysis strategy in which the wheel-IRJ railhead contact is first established in the static analysis and the results transferred to dynamic analysis for impact simulations. The explicit FE method was employed in the dynamic analysis. The Lagrange Multiplier method and the Penalty method for contact constraint enforcement were adopted for
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Martin, Michael. "The Effect of Geometrical Contact Input to Wheel-Rail Contact Model." Thesis, KTH, Spårfordon, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-239735.

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Wheel-rail contact is an important aspect of railway, the forces transferred between the wheel and rail are the one that guide, brake, or accelerate the train, and that is why the understanding of the contact between wheel and rail is an interesting research topic. In this master thesis wheel-rail contact model named ANALYN is used to see the effect of the different geometrical input, like undeformed distance, relative longitudinal curvature, and relative lateral curvature calculation affect the contact patch estimation formed at the wheel-rail contact.  In the process, a geometrical contact s
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Wickramasinghe, Munidasa Widhana Pathiranage Isuru Udara. "Investigation of surface ratchetting due to rail/wheel contact." Thesis, Queensland University of Technology, 2014. https://eprints.qut.edu.au/67800/1/Munidasa%20Widhana%20Pathiranage%20Isuru%20Udara_Wickramasinghe_Thesis.pdf.

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This project advances the knowledge of rail wear and crack formation due to rail/wheel contact in Australian heavy-haul railway lines. This comprehensive study utilised numerous techniques including: simulation using a twin-disk test-rig, scanning electron microscope particle analysis and finite element modeling for material failure prediction. Through this work, new material failure models have been developed which may be used to predict the lifetime and reliability of materials undergoing severe contact conditions.
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Jon, Sundh. "On wear transitions in the wheel-rail contact." Doctoral thesis, KTH, Maskinkonstruktion (Avd.), 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11563.

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Wear transitions in the wheel–rail contact are of increasing interest since the general trend in railway traffic is toward increased velocities and axle loads. Curving increases the risk of flanging, causing the contact to change from an almost pure rolling wheel tread–rail head contact to more of a sliding wheel flange–rail gauge contact on the high rail in curves. Under wheel flange–rail gauge contact conditions, wear transitions to severe or catastrophic wear will occur if the contact is improperly lubricated. Such a transition is the most undesirable transition in the wheel–rail contact, a
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Shahzamanian, Sichani Matin. "Wheel-rail contact modelling in vehicle dynamics simulation." Licentiate thesis, KTH, Spårfordon, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-127949.

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The wheel-rail contact is at the core of all research related to vehicle-track interaction. This tiny interface governs the dynamic performance of rail vehicles through the loads it transmits and, like any high stress concentration zone, it is subjected to serious damage phenomena. Thus, a clear understanding of the rolling contact between wheel and rail is key to realistic vehicle dynamic simulation and damage analyses. In a multi-body-system simulation package, the essentially demanding contact problem should be evaluated in about every millisecond. Hence, a rigorous treatment of the contact
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Books on the topic "Rail contact"

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Bosso, Nicola, Maksym Spiryagin, Antonio Gugliotta, and Aurelio Somà. Mechatronic Modeling of Real-Time Wheel-Rail Contact. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-36246-0.

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Bosso, Nicola. Mechatronic Modeling of Real-Time Wheel-Rail Contact. Springer Berlin Heidelberg, 2013.

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(Firm), Knovel, ed. Wheel-rail interface handbook. CRC Press, 2009.

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L, Grassie S., ed. Mechanics and fatigue in wheel/rail contact: Proceedings of the Third International Conference on Contact Mechanics and Wear of Rail/Wheel Systems, Cambridge, U.K. July 22-26, 1990. Elsevier, 1991.

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Association, International Heavy Haul. Guidelines to best practices for heavy haul railway operations: Wheel and rail interface issues. International Heavy Haul Association, 2001.

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International Conference on Contact Mechanics and Wear of Rail/Wheel Systems (3rd 1990 Cambridge, UK). Papers presented at the ThirdInternational Conference on Contact Mechanics and Wear of Rail/Wheel Systems, Cambridge, UK, July 22-26, 1990. Edited by Dowson Duncan. Elsevier Sequoia, 1991.

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International Conference on Contact Mechanics and Wear of Rail/Wheel Systems (4th 1994 Vancouver, Canada). Papers presented at the 4th International Conference on Contact Mechanics and Wear of Rail-Wheel Systems, Vancouver, Canada, July 24-28, 1994. Edited by Kalousek J. Elsevier, 1996.

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L, Gladwell G. M., Ghonem H. 1947-, and Kalousek Joseph, eds. Contact mechanics and wear of rail/wheel systems II: Proceedings of the international symposium held at the University of Rhode Island, Kingston, R.I., July 8-11, 1986. University of Waterloo Press, 1987.

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Wright, Harold. Light rail in the valley. Classic Day Publishing, 2011.

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Cellar, Horst. Untersuchung des Dämpfungsverhaltens der Schlupfstelle zwischen Rad und Schiene. Kirnberg-Verlag, 1989.

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Book chapters on the topic "Rail contact"

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Pfaff, Raphael. "Wheel-Rail Contact." In Lecture Notes in Mobility. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-69958-0_3.

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Knothe, Klaus, and Sebastian Stichel. "Modeling of Wheel/Rail Contact." In Rail Vehicle Dynamics. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-45376-7_3.

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Bosso, Nicola, Maksym Spiryagin, Antonio Gugliotta, and Aurelio Somà. "Contact Model." In Mechatronic Modeling of Real-Time Wheel-Rail Contact. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-36246-0_5.

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Dhanasekar, Manicka, and Kan Ding. "Rolling Contact Fatigue in Rail – Insulated Rail Joints (IRJ)." In Encyclopedia of Tribology. Springer US, 2013. http://dx.doi.org/10.1007/978-0-387-92897-5_292.

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Bosso, Nicola, Maksym Spiryagin, Antonio Gugliotta, and Aurelio Somà. "Review of Wheel-Rail Contact Models." In Mechatronic Modeling of Real-Time Wheel-Rail Contact. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-36246-0_2.

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Song, Rui, Dilai Chen, and Gang Shen. "Design Method of Rail Grinding Profile Based on Wheel Rail Contact Relationship." In Lecture Notes in Mechanical Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-1876-4_11.

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AbstractWhen the railway track is damaged, it is essential to grind it in in a timely manner to enhance the wheel-rail contact performance. This paper relies primarily on the rolling radius difference function as the main design basis, taking the expected distribution between the wheel and the rail as the boundary condition. In cases where the abscissa of the rail is known, the Euler method is used to solve the differential equation to obtain the optimized ordinate of the rail. The profile of the rail is optimized, and the feasibility of the design method is verified through programmed algorit
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Głowacz, Michał, Marek Kaniewski, and Artur Rojek. "Overhead contact line systems for high-speed rails." In High-Speed Rail in Poland. CRC Press, 2018. http://dx.doi.org/10.1201/9781351003308-11.

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Sehitoglu, Huseyin, and Y. Roger Jiang. "Residual Stress Analysis in Rolling Contact." In Rail Quality and Maintenance for Modern Railway Operation. Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-015-8151-6_28.

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Dubourg, M. C., and J. J. Kalker. "Crack Behaviour under Rolling Contact Fatigue." In Rail Quality and Maintenance for Modern Railway Operation. Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-015-8151-6_30.

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Piotrowski, J. "On an Approach to Prediction of Contact Loading of Rail for Two-Point Contact Between Wheel and Rail." In Rail Quality and Maintenance for Modern Railway Operation. Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-015-8151-6_17.

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Conference papers on the topic "Rail contact"

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Chen, Yung-Chuan, Jao-Hwa Kuang, Li-Wen Chen, Jiang-Che Shin, and Sing-You Lee. "Wheel-Rail Thermal Contact on Rail Corrugation During Wheel Braking." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-79859.

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This paper uses the finite element method to investigate the effect of rail corrugation on the wheel-rail thermal contact pressure and temperature distributions during wheel braking. Contact elements are used to simulate the contact between a wheel and a rail. Various friction coefficients, wavelengths and amplitudes of corrugated rails as well as braking times are considered in this study. The results indicate that, in the wheel-rail contact area, the rail corrugation affects the contact pressure and temperature distributions significantly. A modified equation with time-dependent heat partiti
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Guan, Qinghua, Binbin Liu, and Stefano Bruni. "Effects of Non-Hertzian Contact Models on Derailment Simulation." In 2020 Joint Rail Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/jrc2020-8074.

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Abstract The derailment of trains is a complex phenomenon that requires an elaborate contact model in simulation to better understand its mechanism. The CONTACT program is a well-known reference for wheel-rail contact modeling due to its high accuracy. However, its low computational efficiency restricts its applications especially in the context of a multi-body simulation. Therefore, a high computational efficient, simplified and approximate non-Hertzian contact is preferred in derailment simulation. The aim of this research is to verify the efficiency of a recently developed non-Hertzian whee
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Tunna, John. "Rolling Contact Fatigue in Passenger and Freight Railroads." In 2010 Joint Rail Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/jrc2010-36039.

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Rolling Contact Fatigue (RCF) can occur on wheels and rails in passenger and freight railroads. It can be a significant cost driver, and, if left untreated, it may lead to derailments. Tangential wheel-rail forces, creepage and contract stress are shown to be the causes of RCF. Improved vehicle curving performance and optimized wheel and rail profiles are shown to have benefits. Methods of managing RCF are preventive rail grinding and wheel turning. Improved wheel and rail materials can also have benefits. The paper includes examples of rail and wheel RCF in both passenger and freight railroad
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Mason, Michael A., Charles P. Cartin, Parham Shahidi, John E. Speich, and James Hargraves. "Contact Stress Modeling in Railway Bearings for Imperfect Contact Geometries." In 2015 Joint Rail Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/jrc2015-5808.

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The connection between bearing raceway condition and fatigue in tapered roller bearings utilized in the railroad environment is of interest. Roller bearings for railroad applications are typically precision ground to exact dimensions with crowned contact geometries for optimal loading of components. This normally results in completely elastic Hertzian contact stresses under standard railcar loads with original equipment manufacturer raceway contact geometries. However, with extremely uneven bogie load distributions, impact damage, corrosion and spall repair, imperfect stress distributions can
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Sugiyama, Hiroyuki, and Yoshihiro Suda. "Hybrid Contact Search Algorithm for Wheel/Rail Contact Problems." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-68588.

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In this investigation, the on-line and off-line hybrid contact algorithm for modeling wheel/rail contact problems is developed based on the elastic contact formulation. In the tabular contact search used in existing specialized railroad vehicle dynamics codes, contact points are predicted using an assumption of rigid contacts. For this reason, the contact points can be different from those predicted by the on-line based contact search used in general elastic contact formulations. The difference in the contact point becomes significant when flange contacts that have large contact angles are con
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Spiryagin, Maksym, Sanjar Ahmad, Esteban Bernal, et al. "Implementation of the Contact Roughness at the Wheel-Rail Contact Model for Locomotive Traction Studies." In 2022 Joint Rail Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/jrc2022-84116.

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Abstract This paper introduces a solution to deliver the relation between the contour and real contact areas considering characteristics of surface geometry based on the adaptation of a tribological method [1] for calculation of the real area of contact and the real pressure between two rough surfaces. The implementation in the wheel-rail coupling architecture is kept the same as per the previously developed wheel-rail multibody couplings [2,3] based on the modified Fastsim [4] and Extended Contact [5] algorithms, which allows switching between the previous and new developed coupling for a com
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Kudinov, D., and G. Shaydurov. "Non-contact nondestructive rail testing." In 2009 International Siberian Conference on Control and Communications (SIBCON 2009). IEEE, 2009. http://dx.doi.org/10.1109/sibcon.2009.5044873.

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Mariani, Stefano, Thompson V. Nguyen, Francesco Lanza di Scalea, and Mahmood Fateh. "High Speed Non-Contact Ultrasonic Guided Wave Inspections of Rails." In 2014 Joint Rail Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/jrc2014-3745.

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This paper describes a new system for high-speed and non-contact rail defect detection being developed at the University of California at San Diego (UCSD). A prototype using an ultrasonic air-coupled guided wave signal generation and air-coupled signal detection has been tested at the UCSD Rail Defect Farm. This solution presents an improvement over the previously considered laser/air-coupled hybrid system because it replaces the costly and hard-to-maintain laser with a much cheaper, faster, and easier-to-maintain air-coupled transmitter. In addition to a real-time statistical analysis algorit
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Sugiyama, Hiroyuki, and Yoshihiro Suda. "Wheel/Rail Two-Point Contact Geometry With Back-of-Flange Contact." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-35151.

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In this investigation, a numerical procedure that can be used for the three-dimensional analysis of wheel and rail contact geometry is developed using the constraint contact formulation. The locations of contact points are determined for given lateral and yaw displacements of a wheelset when one-point contact is considered for each wheel, while these two displacements are no longer independent when the two-point contact occurs. A systematic procedure for predicting the flange as well as the back-of-flange contact points is developed and used for the two-point contact analysis of wheel and rail
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Cummings, Scott M., Patricia Schreiber, and Harry M. Tournay. "Parametric Simulation of Rolling Contact Fatigue." In ASME 2008 Rail Transportation Division Fall Technical Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/rtdf2008-74012.

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Simulations of dynamic vehicle performance were used by the Wheel Defect Prevention Research Consortium (WDPRC) to explore which track and vehicle variables affect wheel fatigue life. A NUCARS® model was used to efficiently examine the effects of a multitude of parameters including wheel/rail profiles, wheel/rail lubrication, truck type, curvature, speed, and track geometry. Results from over 1,000 simulations of a loaded 1,272 kN (286,000-pound) hopper car are summarized. Rolling contact fatigue (RCF) is one way that wheels can develop treads defects. Thermal mechanical shelling (TMS) is a su
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Reports on the topic "Rail contact"

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Schorung, Matthieu. A Geographical Contribution on Interurban Passenger Rail Transportation in the United States. Mineta Transportation Institute, 2022. http://dx.doi.org/10.31979/mti.2022.2212.

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Why does the rail infrastructure of the United States lag behind those of many other developed countries? Where is U.S. high-speed rail? This research approaches this in a dilemma by exploring Amtrak’s traditional rail services and high-speed rail projects in the nation to understand the workings of public rail transportation policies, what they contain, and how they are developed and pursued by the different stakeholders. This research utilizes case studies and a multiscale approach to analyze the territorialization of intercity rail transportation policies. The analysis demonstrates the emer
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Peterson, Eric, Wenbin Wei, and Lydon George. A Model for Integrating Rail Services with other Transportation Modalities: Identifying the Best Practices and the Gaps for California’s Next State Rail Plan. Mineta Transportation Institute, 2021. http://dx.doi.org/10.31979/mti.2021.1949.

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The California State Rail Plan (CSRP) is among the best rail plan documents published by any jurisdiction in the United States to date. As such, the CSRP is used in this paper as the basis of comparison to other state rail service plans. These plans will have been submitted to the Federal Railroad Administration (FRA) on record as of June 2020—as required under Section 303 of the Passenger Rail Investment and Improvement Act (PRIIA) of 2008. The purpose of this paper is to identify the best practices and gaps that may inform California and other states in their future rail service plan develop
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Catton, Theodore, and Krahe Diane. The Shaping of a Natural and Industrial Landscape: Whiskeytown National Recreation Area Historic Resource Study. U.S. Department of the Interior, National Park Service, 2025. https://doi.org/10.36967/2313935.

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The history of Whiskeytown is primarily a history that centers around a series of resource-extraction-based human occupations. In pre-contact times the place was occupied by the Wintu and the vital resource that they exploited was salmon. In 1849, the vital resource became gold. Later it was copper. Then it was timber in the forest. And then it was water, which falls on the mountains as rain and snow and is so vital to the agriculture and population that is concentrated in the thirsty valley below. Today the vital resource is not just the mountain water itself but all the recreation that occur
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Schöner, Wolfgang, Jorrit van der Schot, Peter Schweitzer, Sophie Elixhauser, and Anna Burdenski. Snow to Rain: From phase transition of precipitation to changing local livelihoods, emotions and affects in East Greenland. Verlag der Österreichischen Akademie der Wissenschaften, 2023. http://dx.doi.org/10.1553/ess-snow2rain.

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Snow2Rain investigated the impacts and perception of climate change in East Greenland through a holistic approach that includes natural science methods of time series analysis and statistical climatology on the one hand, and social science approaches of social anthropology on the other. In addition, this interdisciplinary approach was based in a transdisciplinary framework by involving the local people in Tasiilaq (East Greenland) and their knowledge. Based on the intention to study the effects of climate close to the everyday life of the locals, snow was chosen as one such interdisciplinary i
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Buathong, Thananon, Anna Dimitrova, Paolo Miguel M. Vicerra, and Montakarn Chimmamee. Years of Good Life: An illustration of a new well-being indicator using data for Thailand. Verlag der Österreichischen Akademie der Wissenschaften, 2021. http://dx.doi.org/10.1553/populationyearbook2021.dat.1.

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While Thailand has achieved high levels of economic growth in recent decades, poverty at the local level has been increasing. Indicators of human development at the national level often mask the differences in well-being across communities. When responding to the need for sustainable development research, the heterogeneity of a population should be emphasised to ensure that no one is left behind. The Years of Good Life (YoGL) is a well-being indicator that demonstrates the similarities and differences between subpopulations in a given sociocultural context over time. The data used in this anal
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Schuurman, Gregor, and David Lawrence. Adapting to climate change-driven loss of ecologically important species and processes from park ecosystems: A study of management options for Glacier National Park streams in the context of National Park Service policy and guidance. National Park Service, 2025. https://doi.org/10.36967/2307053.

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The traditional paradigm in mainstream environmental stewardship assumes a stationary climate in which climatic and ecological change generally occur within bounds (e.g., “natural range of variability”) and managers can conserve ecosystems by preserving their historically co-occurring species, natural communities, and physical and biological processes. For example, 2006 Management Policies, the current NPS management policies document, suggests that by preserving ecosystem components and processes in their natural condition, the NPS will prevent resource degradation and thus avoid any subseque
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Christensen, Steen. Documentation of Edcrop – version 1: A Python package to simulate field-scale evapotranspiration and drainage from crop, wetland, or forest. Royal Danish Library, 2024. http://dx.doi.org/10.7146/aul.539.

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Evapotranspiration is one of the major components of Earth’s Water Balance, being the sum of evaporation and plant transpiration from the land and ocean surface. This report documents edcrop, a Python package that use climate input to simulate field-scale evapotranspiration and drainage from the root zone of an area covered with a crop, a wetland, or a forest. The conceptual model implemented in edcrop is a modification of the Evacrop model by Olesen and Heidmann (2002), which itself builds on the Watcros model by Aslyng and Hansen (1982). The edcrop conceptualization is based on consideration
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Arumugam, Udayansankar, Mimoun Elboujdaini, Ming Gao, and Ramiro Vanoye. PR-328-133702-R02 F-S Fatigue Testing of Crack-in-Dent with Framework for Life Prediction. Pipeline Research Council International, Inc. (PRCI), 2019. http://dx.doi.org/10.55274/r0011628.

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ASME B31.8 states that "Dents that contain stress corrosion cracking or other cracks are injurious to the pipeline" and therefore, requires immediate attention by the Operators. Dent containing crack fields (colonies) are often observed in liquid pipelines. The recently completed PRCI research project MD-1N "Study of the Mechanism for Cracking in Dents in a Crude Oil Pipeline" showed evidence of a mechanism for fatigue cracking. The crack growth rate as a function of stress intensity factor was estimated using the measured spacings of fatigue striations from fracture surfaces based on the assu
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Raymond, Kara, Laura Palacios, Cheryl McIntyre, and Evan Gwilliam. Status of climate and water resources at Chiricahua National Monument, Coronado National Memorial, and Fort Bowie National Historic Site: Water year 2019. National Park Service, 2022. http://dx.doi.org/10.36967/nrr-2293370.

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Climate and hydrology are major drivers of ecosystems. They dramatically shape ecosystem structure and function, particularly in arid and semi-arid ecosystems. Understanding changes in climate, groundwater, and water quality and quantity is central to assessing the condition of park biota and key cultural resources. The Sonoran Desert Network collects data on climate, groundwater, and surface water at 11 National Park Service units in southern Arizona and New Mexico. This report provides an integrated look at climate, groundwater, and springs conditions at Chiricahua National Monument (NM), Co
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Jones, David, Roy Cook, John Sovell, et al. Natural resource condition assessment: Lincoln Boyhood National Memorial. National Park Service, 2024. http://dx.doi.org/10.36967/2301822.

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The National Park Service (NPS) Natural Resource Condition Assessment (NRCA) Program administered by the NPS Water Resources Division evaluates current conditions for important natural resources and resource indicators using primarily existing information and data. NRCAs also report on trends in resource condition, when possible, identify critical data gaps, and characterize a general level of confidence for study findings. This NRCA complements previous scientific endeavors, is multi-disciplinary in scope, employs a hierarchical indicator framework, identifies and develops reference condition
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