Results 31 to 40 of about 23,739 (181)

Slip misdetection phenomena caused by bogie vibration during re-adhesion control of railway vehicle

Nihon Kikai Gakkai ronbunshu, 2021
Wheel slips in railway vehicles cause poor acceleration and damage to wheels and rails. Re-adhesion control is widely used to resolve wheel slips in electric motor cars.
Taihei YAMAGUCHI, Yohei MICHITSUJI, Shingo MAKISHIMA, Satoru TAKAHASHI   +3 more
doaj   +1 more source

Effects of Freeplay on Dynamic Stability of an Aircraft Main Landing Gear [PDF]

, 2013
A study is made into the occurrence of shimmy oscillations in a dual-wheel main landing gear. Nonlinear equations of motion are developed for the system, and various effects are considered, including gyroscopic coupling, nonlinear tire properties ...
Howcroft, Chris, Krauskopf, Bernd, Lowenberg, Mark H, Neild, Simon A   +3 more
core   +2 more sources

The load bearing capacity of railway masonry arch bridges [PDF]

, 2018
This paper deals with the way of calculating the load-bearing capacity of masonry arch railway bridges. It reviews the basic aspects of structural behaviour of these bridges, such as material non-linearity of masonry and interaction with the soil ...
Drahorád, Michal, Vokál, Marek
core   +1 more source

Construction of Skin‐Adaptable Slide‐Ring Hydrogels Based on Bile Acids Derived Polyrotaxanes for Smart Wound Dressing

Advanced Science, EarlyView.
A novel β‐cyclodextrin/bile acid‐based slide‐ring hydrogel was prepared via precise host–guest recognition and photopolymerization. This smart hydrogel dressing exhibited skin‐adaptive mechanical properties, pH‐responsive antibacterial activity, and integrated multi‐signal sensing (temperature, blood, and pressure) for advanced wound management ...
Wen Huang, Xueru Xiong, Qian Sun, Xiangting Lai, Lili Cai, Yunhua Chen, Lin Wang, Yong‐Guang Jia   +7 more
wiley   +1 more source

A comparison of bearing life in new and refurbished railway axle boxes [PDF]

, 2001
A simple linear dynamical model shows that at normal running speeds of freight wagons, forced oscillations due to periodic track compliance are transferred to the overlying unsprung mass and significantly amplified. Due to these oscillations, a small gap
Broadbridge, P., Wake, G.
core  

Multifaceted Behavior and Functional Versatility of Ferritic Stainless Steels, Part I: Applications and Processing, a Review

steel research international, EarlyView.
This review investigates the processing‐microstructure‐property relationships in ferritic stainless steels (FSSs). It highlights advances in deformation behavior, heat treatments, surface modifications, and alloying effects. Theoretical models, including Johnson‐Mehl‐Avrami‐Kolmogorov, Arrhenius, nucleation theory, and diffusion theories, are discussed
Shahab Bazri, Carlo Mapelli, Silvia Barella, Andrea Gruttadauria, Davide Mombelli   +4 more
wiley   +1 more source

Laboratory robustness validation of a humidity sensor system for the condition monitoring of grease-lubricated components for railway applications [PDF]

Journal of Sensors and Sensor Systems
The condition monitoring of the health status of lubricating greases used in axle box bearings can be realized by applying well-established electrical or optical measurement principles.
K. Dubek, K. Dubek, C. Schneidhofer, N. Dörr, U. Schmid   +4 more
doaj   +1 more source

Impact of half‐joint failures on RC girder bridges: A robustness quantification study

Structural Concrete, EarlyView.
Abstract The robustness of bridge structures is critical to ensuring safety and service continuity, particularly in aging infrastructure exposed to degradation and unexpected loads. Reinforced concrete (RC) half‐joint bridges—widely built in Italy between the 1950s and 1970s—exhibit specific vulnerabilities due to inspection challenges, durability ...
Paolo Martinelli, Matteo Colombo
wiley   +1 more source

Real-time estimation of road friction coefficient in different road conditions

Journal of Hebei University of Science and Technology, 2020
In order to accurately estimate the road adhesion coefficient under different road conditions and improve the safety and stability of vehicles, a method was proposed to estimate the road adhesion coefficient based on the front and rear wheels speed and ...
Jian WANG, Jun YANG, Peng YU, Aijuan LI, Tian WEI   +4 more
doaj   +1 more source

Large‐scale tests of 50‐year‐old prestressed concrete bridge girders

Structural Concrete, EarlyView.
Abstract An experimental investigation has been carried out as part of the BRIDGE|50 research project, focusing on large‐scale loading tests performed on five 50‐year‐old prestressed concrete (PC) girders. The study aimed at evaluating the structural response of five girders retrieved from a viaduct in the urban area of Turin, Italy, subjected to 4 ...
Francesco Tondolo, Pierclaudio Savino, Donato Sabia, Antonino Quattrone, Fabio Biondini, Gianpaolo Rosati, Mattia Anghileri, Bernardino Chiaia   +7 more
wiley   +1 more source