Results 51 to 60 of about 23,225 (270)

An Efficient Numerical Model to Predict the Mechanical Response of a Railway Track in the Low-Frequency Range

Vibration, 2022
With railway interoperability, new trains are allowed to move on the French railway network. These trains may present different designs from standard trains.
Maryam El Moueddeb, François Louf, Pierre-Alain Boucard, Franck Dadié, Gilles Saussine, Danilo Sorrentino   +5 more
doaj   +1 more source

Toward Knowledge‐Based Workflows: A Semantic Approach to Atomistic Simulations for Mechanical and Thermodynamic Properties

Advanced Engineering Materials, EarlyView.
Knowledge‐based atomistic workflows are presented for mechanical and thermodynamic properties. By coupling modular simulations with ontology‐aligned metadata and provenance, Fe case studies on elastic behavior, defects, thermal properties, and Hall–Petch strengthening reveal how FAIR, queryable, and reusable simulation data can be generated. Mechanical
Abril Azócar Guzmán, Hoang‐Thien Luu, Sarath Menon, Tilmann Hickel, Nina Merkert, Stefan Sandfeld   +5 more
wiley   +1 more source

Degradation of railway track geometry – Correlation between track stiffness gradient and differential settlement

, 2020
Based on the track geometry car recordings performed from 1999 to 2016 on a section of the Swedish heavy haul line Malmbanan, the vertical track geometry degradation is analysed for wavelengths in the interval 1–25 m.
Jansson, Fredrik, Nielsen, Jens, Hammar, Anders,, Hammar, Anders, Jansson, Fredrik,, Bolmsvik, Rikard,, Berggren, Eric G., Bolmsvik, Rikard, Berggren, Eric G.,, Nielsen, Jens,   +9 more
core   +1 more source

Molecular Dynamics Studies of Shape Memory Polymers: From Bead–Spring Models to Atomistic Simulations

Advanced Engineering Materials, EarlyView.
Coarse‐grained (left) and atomistic (right) models of the shape memory polymer ESTANE ETE 75DT3 are shown schematically. The two representations bridge molecular detail and mesoscopic description. Both models capture shape memory behavior, linking segmental mobility and conformational relaxation of anisotropic chains to macroscopic recovery, and ...
Fathollah Varnik
wiley   +1 more source

Influence of Rail Track Foundation Parameters on the Nonlinear Dynamic Response of a Railway Track

Technical Transactions
The dynamic response of railway tracks is a key factor influencing the operational safety and reliability of rail transport. Classical analytical methods for modelling track dynamics become insufficient at higher operating speeds, as they typically ...
Kozioł Piotr, Pilecki Zenon
doaj   +1 more source

Dynamic response of a vehicle with flexible car body moving on a ballasted track

MATEC Web of Conferences, 2018
In this study, the dynamic response of a vehicle with flexible car body moving on a ballasted track is investigated. The vehicle/track interaction model is divided into two sub-systems, namely the vehicle and the ballasted track sub-system.
Wang Yingjie, Dimitrovová Zuzana, Yau Jong-Dar   +2 more
doaj   +1 more source

Study on Steady-State Responses of High-Speed Vehicle Using Infinite Long Track Model

Shock and Vibration, 2020
The coupled vehicle/track dynamic model is formulated through integrating a high-speed rail vehicle model with a slab track model via the wheel/rail contact model.
Wubin Cai, Maoru Chi
doaj   +1 more source

Experimental Characterization and Constitutive Modeling of the Effect of Prior Inelastic Strain on the Viscoplastic Behavior of AD730 at 700 °C

Advanced Engineering Materials, EarlyView.
This study shows that superalloys used in aircraft engine disks become much more prone to deformation at high temperatures if they have been strained during manufacturing. This effect increases with the level of prior strain but eventually reaches a limit.
Fabio Machado Alves da Fonseca, Patrick Villechaise, Malik Durand, Arnaud Longuet, Florent Coudon, Loïc Signor, Julien De Jaeger, Dominique Eyidi, Nathalie Bozzolo, Jonathan Cormier   +9 more
wiley   +1 more source

A Coupling Vibration Test Bench and the Simulation Research of a Maglev Vehicle

Shock and Vibration, 2015
To study the characteristics of the coupling vibration between a maglev vehicle and its track beam system and to improve the performance of the levitation system, a new type of vibration test bench was developed.
Weihua Ma, Rongrong Song, Junqi Xu, Yu Zang, Shihui Luo   +4 more
doaj   +1 more source

From Shear to Sound: Mechanics–Acoustics Mapping of TPMS Lattices

Advanced Engineering Materials, EarlyView.
Triply periodic minimal surface (TPMS) lattices are mapped across mechanical and acoustic performance, revealing that descriptors validated in compression fail under shear. First‐time comparison with trusses included. A transition from porous to resonance‐driven absorption emerges at 25% density.
Lucía Doyle, María Ángeles Navacerrada, Johan Christensen, Carlos González   +3 more
wiley   +1 more source