Results 61 to 70 of about 23,225 (270)

Importance of bending stiffness of different track forms

, 2021
The most common form of railway track construction is still discrete sleepers on ballast. However other types of track, sometimes referred to as ballastless, hybrid and / or slab track, may in some circumstances be more cost effective over their life ...
Rampat, Toshan, Chandr, Le Pen, Louis, Powrie, William, Harkness, John   +3 more
core  

Prognostics of unsupported railway sleepers and their severity diagnostics using machine learning

Scientific Reports, 2022
Railway sleepers are safety–critical components of a railway structure. They support ballasted track superstructure and are a critical factor in track geometry and track components’ deterioration.
Jessada Sresakoolchai, Sakdirat Kaewunruen   +1 more
doaj   +1 more source

Compatibility of Methacrylate Based Resins Controls Interfacial Failure and Toughness in 3D‐Printed Multimaterial Composites

Advanced Engineering Materials, EarlyView.
This work shows that the mechanical performance of multimaterial digital light processing (DLP) printed thermoset composites is governed by resin compatibility and interfacial design rather than spatial patterning alone. Brittle and ductile resin combinations produced premature interfacial failure, while graded interfaces and mechanically compatible ...
Ahmed M. H. Ibrahim, Li Meng, Ahmad R. Najafi, Nicolas J. Alvarez   +3 more
wiley   +1 more source

Influence of Ballast and Sub-Ballast Thickness on Structural Behavior of Heavy-Haul Railway Platform Determined by Using Finite Element Modeling

Construction Materials
This study investigates the influence of ballast and sub-ballast thicknesses on the structural behavior of a heavy-haul railway platform by using finite element modeling with SysTrain software (v.
Magdiel Acaz de Oliveira Teixeira, William Wilson dos Santos, Lisley Madeira Coelho, Lidiane Hellen dos Santos Santana, Fábio Grisolia de Ávila, Sergio Neves Monteiro, Antônio Carlos Rodrigues Guimarães   +6 more
doaj   +1 more source

Comparison of Triply Periodic Minimal Surface Energy Absorbers Under Uniaxial Compressive Loading

Advanced Engineering Materials, EarlyView.
This study investigates LCD 3D printed Triply Periodic Minimal Surface (TPMS) structures as mechanical energy absorbers. By comparing various base designs and layered combinations under uniaxial compression, it identifies that a Diamond‐Gyroid sandwich structure offers superior performance.
Sergej Grednev, Noah‐Lean Roschlaub, Anne Jung   +2 more
wiley   +1 more source

Wheelset-Track Dynamic Interaction Modelling with Frequency- and Preload-Dependent Stiffness and Damping of Resilient Track Components

, 2022
Resilient track components are widely used in the modern railway tracks, such as the rail pads, the sleeper pads, the continuous support of the embedded rail system (ERS), etc.
Collina A., Di Gialleonardo E., Corradi R., Li Q.   +3 more
core   +1 more source

Field investigation on variation of rail support modulus in ballasted railway tracks

Latin American Journal of Solids and Structures
Rail support modulus is an important factor in safety of railway track. This parameter is defined as support force imposing on rail length unit per rail unit displacement in vertical direction.
Jabbar Ali Zakeri, Rauf Abbasi
doaj   +1 more source

Experimental and Numerical Modal Analysis of Composite Sandwich Structures Using Surfboards as Model Systems

Advanced Engineering Materials, EarlyView.
This article presents an experimental and numerical modal investigation of composite sandwich structures using surfboards as model systems. By comparing different core materials and reinforcement strategies, the study demonstrates how local stiffeners influence vibrational response and introduce characteristic modal features, highlighting modal ...
Brett Connellan, Luca Lomazzi, Mathis Mercier, Kara Stark, Marc in het Panhuis   +4 more
wiley   +1 more source

Assessing the Role of Longitudinal Variability of Vertical Track Stiffness in the Long-Term Deterioration

, 2016
The performance of the railway system in terms of dynamic loading is depending mainly on the track support conditions. Usually, the track stiffness is used as the main parameter to describe the support conditions and is defined as the ratio of the load ...
Grossoni, I., Andrade, A. R., Ramos Andrade, Antonio, Grossoni, Ilaria, Bezin, Y., Bezin, Yann   +5 more
core  

Relating trackbed stiffness and behaviour with track performance and maintenance needs

, 2023
Differential settlement along the track is a significant concern for railways, especially but not exclusively at transitions onto or from hard substructures.
Ognibene, Giacomo
core   +1 more source