Results 111 to 120 of about 19,165 (224)

Simple particle shapes for DEM simulations of railway ballast: influence of shape descriptors on packing behaviour. [PDF]

Granul Matter, 2020
Suhr B, Six K.
europepmc   +1 more source

Optimization of support stiffness at a railway crossing panel [PDF]

, 2016
Turnouts are a key element of the railway system. They are also one part of the railway system with the highest number of degradation modes and failures for a number of reasons, including dynamic loads generated from non-linearities in the rail geometry ...
Bezin, Yann, Grossoni, Ilaria, Neves, Sérgio   +2 more
core  

Laboratory and numerical analysis for enhanced ballast performance: towards sustainable railway track pavement design

Transportes
The physical and mechanical characterization of rock materials is a crucial step for their applicability as a railway ballast layer. However, most of the standardized tests for such characterization do not have direct application for the ballast layer ...
Andre Fardin Rosa, Stefanie de Carla Dias de Carla Dias, Wescley Silva Brito, Robson Correia Costa, Edson de Moura, Liedi Légi Bariani Bernucci, Rosângela dos Santos Motta   +6 more
doaj   +1 more source

Hubungkait antara sikap dan pengetahuan pelajar kejuruteraan awam terhadap amalan keselamatan di bengkel perkayuan, KUiTTHO [PDF]

, 2002
Laporan kcmalangan yang dilaporkan olch Jabatan Buruh dan Pcrtubuhan Kcbajikan Sosial (SOCSO) mcnyatakan bahawa kadar kcmalangan dalam bidang pcrindustrian semakin mcningkat dari tahun ke tahun.
Wan Mansor, Wan Hilmi
core  

Experimental Investigation the Geometric Properties of Aggregates on Ballast Flight Phenomena of Railway Track [PDF]

International Journal of Railway Research
High-speed railway tracks have expanded significantly across the world in recent years. The increase in train operating speeds imposes considerable aerodynamic forces on the track, which can lead to several technical issues—one of the most important ...
Hamidreza Heydari, Mohammadreza Talaee, Aynaz Naseri   +2 more
doaj  

The small-strain stiffness of a railway ballast

Géotechnique
The large particle sizes of railway ballast and rock fill have meant that conventional techniques used to measure the small-strain stiffness of finer geomaterials have not been adopted, with the consequence that their stiffnesses are poorly defined.
Altuhafi, FN, Coop, Matthew Richard
openaire   +2 more sources

Railway ballast characteristics, selection criterion and performance

, 2014
This work is a comprehensive investigation to find to what extent simple laboratory tests e.g. Los Angeles abrasion and micro-Deval might be suitable for predicting real railway ballast performance with respect to deformation and degradation. A number of tests to measure essential properties of ballast aggregate have been performed in addition to ...
openaire   +2 more sources

Critical Speed of Ballasted Railway Tracks: Influence of Ballast and Subgrade Degradation

Transportation Geotechnics, 2023
Rakesh Sai Malisetty, Buddhima Indraratna   +1 more
openaire   +1 more source

Numerical Analysis of the Dynamic Behavior of the Ballasted Railway Track Under Loading of Trains at Variable Speeds to Improve the Prediction of Dynamic Amplification Factors and Damage to Its Components

Shock and Vibration
This study contributes to the dynamic amplification effects of different speeds of trains on the behavior of the ballasted railway. The damage mechanisms of the main components of ballasted railway tracks were investigated in 3D numerical modeling using ...
Zoa Ambassa, Jean Chills Amba
doaj   +1 more source

Mechanics of railway ballast behaviour [PDF]

It is important to have consistent ballast testing methods that provide results reflecting the performance of different ballast materials in the railway trackbed. In this research, extensive laboratory tests were conducted to investigate the correlation between simple ballast index tests, and box tests simulating ballast field loading conditions in a ...
openaire