Results 31 to 40 of about 446,614 (267)

Impact of Wheel-rail Lubrication on Outer Rail Wear in Metro Small Radius Curved Segments

Chengshi guidao jiaotong yanjiu
[Objective] For metro lines with high proportion of small radius curved segments and severe rail wear, lubrication can alter wheel-rail contact area friction coefficient and in turn effectively reduce rail wear, thus it is necessary to study the ...
Xinwei LUO, Bin ZHANG, Longyang WANG, Qingsong FENG   +3 more
doaj   +1 more source

ANALYSIS OF DEVELOPMENT CHARACTERISTICS OF RAIL WEAR DISTRIBUTION OF SMALL RADIUS CURVE SECTION IN METRO

Jixie qiangdu, 2020
Based on vehicle-track coupled dynamics and Archard wear models,the influence of different axle loads,friction coefficients and running speeds on the rail wear characteristics of small radius curve section in metro were analyzed and discussed.The results
LEI ZhenYu, WANG ZhiQiang
doaj  

Prediction of Rail Wear Under Different Railway Track Geometries Using Artificial Neural Networks

Infrastructures
The geometry of the railway track affects rail wear significantly. If the rail wear can be predicted and considered during the alignment design phase, the problems it causes can be mitigated at the source by optimizing the values and combinations of ...
Hong Zhang, Weichen Shuai, Linya Liu, Pengfei Zhang, Kejun Zhang, Hongsong Lin, Yuke Zhang, Wei Li   +7 more
doaj   +1 more source

Wheel-rail wear characteristics of a modern tram passing curves with small radius

Archives of Transport
The wheel-rail wear was predicted for modern trams with independently rotating wheelset running on a groove-shaped rail. The tram vehicle-track coupled dynamics model, considering the wheel-rail multi-point contact, was developed using software UM to ...
Zhongjie Zhang, Xinwen Yang, Yanyan Zhang, Caixia Miao, Yipeng Cui, Jiqiang Shen   +5 more
doaj   +1 more source

Autonomous Folding of Soft Matter From Living Polymers

Advanced Materials, EarlyView.
Origami structures are endowed with “living” polymer creases that grow, remodel, and stiffen in response to nutrient solutions. This post‐fabrication growth enables autonomous folding, iterative regrowth, and mechanical tuning involving origami assemblies, such as cranes, Miura‐ori tessellations, rigid and non‐rigid square‐twist patterns, establishing ...
Jiahe Huang, Tuo Zhao, Shixi Zang, Deep Malu, Huajian Ji, Glaucio H. Paulino, Yuhang Hu   +6 more
wiley   +1 more source

Mapping rail wear regimes and transitions [PDF]

, 2004
This paper outlines work carried out to produce maps of rail material wear coefficients taken from laboratory tests run on twin disc and pin-on-disc machines as well as those derived from measurements taken in the field.
Olofsson, U., Lewis, R., Olofsson, Ulf,
core   +1 more source

Controlled Growth of Boron Nitride in Various Phases

Advanced Materials Interfaces, EarlyView.
Phase‐selective boron nitride growth is presented as a unified materials‐design problem across hexagonal, rhombohedral, cubic, and amorphous phases. By linking synthesis routes to thermodynamic stability, kinetic accessibility, surface diffusion, interfacial templating, and energetic activation, this review clarifies how bonding and stacking are ...
Pan Wu, Kanghao Xie, Jiajie Qi, Xiaorui Zheng, Kaihui Liu, Xuedong Bai, Li Wang   +6 more
wiley   +1 more source

A Proof‐of‐Concept Assessment of a Novel Wearable Eyelid Muscle Device: A Pre‐Clinical Animal Cadaver Study for Eyelid Closure Restoration

Advanced Robotics Research, EarlyView.
This article introduces a soft wearable eyelid sling device incorporating a hydraulic soft artificial muscle (SAM) for achieving complete closure of an eyelid. The SAM is driven by a cam mechanism that provides a displacement profile closely matched with those of a healthy eyelid.
Patrick Pruscino, Phuoc Thien Phan, James Davies, Bibhu Sharma, Tianruo Guo, Chi Cong Nguyen, Nigel H. Lovell, Thanh Nho Do   +7 more
wiley   +1 more source

A study on the modelling for predicting worn profile of rail with multi-body dynamics and the verifying the validity

Nihon Kikai Gakkai ronbunshu, 2017
In recent years, railway system is attracting attention in terms of energy efficiency and environment friendliness. Rail of railway is one of the most important elements in constructing railway system.
Masahiro TSUJIE, Ariku YOSHIOKA, Yuki MIZUTANI, Yoshiaki TERUMICHI   +3 more
doaj   +1 more source

Experimental Investigation on the Wear and Damage Characteristics of Machined Wheel/Rail Materials under Dry Rolling-Sliding Condition

Metals, 2020
To guarantee the smooth operation of trains, rail grinding and wheel turning are necessary practices to remove surface defects. Surface integrity of machined wheel/rail materials is significant to affect their tribological performance.
Peijie Liu, Yanming Quan, Junjie Wan, Lang Yu   +3 more
doaj   +1 more source