Searched for: subject%3A%22Contact%22
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Meijers, P.C. (author)
Increasing demand for energy from renewable sources has resulted in ambitious plans to construct a large number of offshore wind farms in the coming years. In relatively shallow water depths, the preferred support structure for wind turbines is the steel monopile, which is a thin-walled cylindrical structure. To decrease the cost of the...
doctoral thesis 2021
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Gonzalez Acosta, J.L. (author), Vardon, P.J. (author), Hicks, M.A. (author)
Mesh based methods such as the finite element method (FEM) are the most usually used techniques for analysing soil-structure interaction problems in geotechnical engineering. Nevertheless, standard FEM is unable to simulate large deformations and contact, hindering the realistic simulation of rotational, sliding, pull-out and overturning...
journal article 2021
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Antonova, Anna (author), Eik, Marika (author), Punkki, Jouni (author), Jokinen, Ville (author), Puttonen, Jari (author)
The performance of fibre reinforced cementitious composites depends on the interaction between the cementitious matrix and the fibres on the micro-scale. This interaction is affected by the material and surface properties of the fibre and the micro-scale characteristics of the cementitious matrix close to the fibre surface, creating the...
conference paper 2021
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Zhang, P. (author), Moraal, J. (author), Li, Z. (author)
An innovative downscale test rig called V-Track has been constructed for wheel-rail contact experiments under impact loading conditions. In this paper, a force measurement system termed a dynamometer was developed in V-Track to measure the wheel-rail contact forces. The dynamometer consists of four 3-component piezoelectric force sensors and...
journal article 2021
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Shen, C. (author), Deng, X. (author), Wei, Z. (author), Dollevoet, R.P.B.J. (author), Zoeteman, A. (author), Li, Z. (author)
A singular rail or wheel surface irregularity, such as a squat, insulation joint or wheel flat, can cause large wheelrail impact force. Both the magnitude and frequency content of the impact force need to be correctly modelledbecause they are closely related to the formation, deterioration and detection of such irregularities. In this paper,we...
journal article 2021
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Tanis, F. (author)
İzmir, amongst Eastern Mediterranean port cities, has represented compelling architectural and urban developments during the long nineteenth century. Due to their particular geographical position, the port city of İzmir has been considered a place where "East meets West". Building on what Edward Said calls intertwined history, this paper...
book chapter 2021
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Murugesan, Yaswanth (author), Parayil Venugopalan, S. (author), Nicola, L. (author)
Contact between elastic bodies with self-affine rough surfaces is mostly studied with a focus on determining surface fields, despite body fields are of great importance to establish, for instance, when and where elasticity breaks down. This work aims at analyzing the effect of contact roughness on the body fields of compressible frictionless...
journal article 2021
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Meijers, P.C. (author), Tsouvalas, A. (author), Metrikine, A. (author)
This paper reports on a measurement campaign in which the magnetomechanical response of a steel monopile is recorded during installation with a hydraulic impact hammer. By comparing impact-induced changes in the magnetic stray field of the structure to the measured strain, this effect is analysed for the first time under dynamic loading...
journal article 2021
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Zhao, Y. (author), Procel Moya, P.A. (author), Han, C. (author), Mazzarella, L. (author), Yang, G. (author), Weeber, A.W. (author), Zeman, M. (author), Isabella, O. (author)
Low activation energy (E<sub>a</sub>) and wide bandgap (E<sub>g</sub>) are essential for (p)-contacts to achieve effective hole collection in silicon heterojunction (SHJ) solar cells. In this work, we study Plasma-Enhanced Chemical Vapor Deposition p-type hydrogenated nanocrystalline silicon oxide, (p)nc-SiO<sub>x</sub>:H, combined with (p)nc...
journal article 2021
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Gonzalez Acosta, J.L. (author), Vardon, P.J. (author), Hicks, M.A. (author)
An implicit contact algorithm for the material point method (MPM) has been developed to simulate contact. This allows recently developed implicit MPM codes to simulate large-scale deformations and interaction with external bodies. The performance of the method has been investigated and compared to an existing explicit method using benchmark...
journal article 2021
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Song, Yang (author), Wang, H. (author), Liu, Zhigang (author)
In railway pantograph-catenary systems, the contact surfaces undergo wear in long-term operations, directly affecting interaction performance and potentially deteriorating the current collection quality. The effect of contact wire wear (CWW) on the current collection quality should be evaluated to understand the system's health status in...
journal article 2021
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Nanni, Mirco (author), Andrienko, Gennady (author), Barabási, Albert László (author), Boldrini, Chiara (author), Bonchi, Francesco (author), Cattuto, Ciro (author), Dignum, Virginia (author), Helbing, Dirk (author), van den Hoven, M.J. (author)
The rapid dynamics of COVID-19 calls for quick and effective tracking of virus transmission chains and early detection of outbreaks, especially in the “phase 2” of the pandemic, when lockdown and other restriction measures are progressively withdrawn, in order to avoid or minimize contagion resurgence. For this purpose, contact-tracing apps...
journal article 2021
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Liang, Hongqin (author), Li, Wei (author), Zhou, Zhijun (author), Wen, Zefeng (author), Li, S. (author), An, Dong (author)
Based on the measured spectra of rail roughness and track structures longitudinal roughness, the rail grinding limit is studied with the help of an established coupled dynamic metro vehicle–track model and a rolling contact fatigue model. The results indicate that metro rail grinding control should be regulated according to corrugation...
journal article 2021
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Lai, Marco (author), Dicorato, Claudio Spiridione (author), de Wild, Marco (author), Verbakel, Frank (author), Shulepov, Sergei (author), Groen, Joanneke (author), Notten, Marc (author), Lucassen, Gerald (author), Van Sambeek, Marc R.H.M. (author), Hendriks, B.H.W. (author), de With, Peter H.N. (author)
Peripheral Artery Diseases (PAD) are caused by the occlusions of arteries in the peripheral locations of the circulatory system. The severity of PAD is usually assessed using the Ankle Brachial Index (ABI) and the Ultrasound Doppler. Non-contact Photoplethysmography (PPG) imaging is a recent emerging technology capable of monitoring skin...
conference paper 2021
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Angeloni, L. (author), Ganjian, M. (author), Nouri Goushki, M. (author), Mirzaali Mazandarani, M. (author), Hagen, C.W. (author), Zadpoor, A.A. (author), Fratila-Apachitei, E.L. (author), Ghatkesar, M.K. (author)
Micro- and nano-patterns are gaining increasing attraction in several fields ranging from nanoelectronics to bioengineering. The mechanical properties of the nanostructures (nanopillars, nanotubes, nanowires, etc.) are highly relevant for many applications but challenging to determine. Existing mechanical characterization methods require...
journal article 2021
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Yang, Fei (author), Wei, Zilong (author), Sun, Xianfu (author), Shen, C. (author), Nunez, Alfredo (author)
In this study, a wheel-rail transient rolling contact model capable of accounting for the nonlinear displacement-force properties of hanging sleepers is proposed. The sleeper hanging status affected by rail irregularities is an input for an analysis of the wheel-rail contact behavior and related rail degradation in terms of plastic...
journal article 2021
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Onkhar, V. (author), Bazilinskyy, P. (author), Stapel, J.C.J. (author), Dodou, D. (author), Gavrila, D. (author), de Winter, J.C.F. (author)
Non-verbal communication, such as eye contact between drivers and pedestrians, has been regarded as one way to reduce accident risk. So far, studies have assumed rather than objectively measured the occurrence of eye contact. We address this research gap by developing an eye contact detection method and testing it in an indoor experiment with...
journal article 2021
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Zhao, J. (author), Caselli, V.M. (author), Bus, M. (author), Boshuizen, B. (author), Savenije, T.J. (author)
Wide-band-gap perovskites such as methylammonium lead bromide (MAPB) are promising materials for tandem solar cells because of their potentially high open-circuit voltage, which is yet still far below the maximum limit. The relatively short charge-carrier lifetimes deduced from time-resolved photoluminescence (TRPL) measurements seem in...
journal article 2021
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Albaba, Adnan (author), Simões-Capela, Neide (author), Wang, Yuyang (author), Hendriks, R.C. (author), De Raedt, Walter (author), Van Hoof, Chris (author)
Background and objective: Long-term electrocardiogram monitoring comes at the expense of signal quality. During unconstrained movements, the electrocardiogram is often corrupted by motion artefacts, which can lead to inaccurate physiological information. In this situation, automated quality assessment methods are useful to increase the...
journal article 2021
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Mohajeri, M. (author), van Rhee, C. (author), Schott, D.L. (author)
This paper presents a multi-step DEM calibration procedure for cohesive solid materials, incorporating feasibility in finding a non-empty solution space and definiteness in capturing bulk responses independently of calibration targets. Our procedure follows four steps: (I) feasibility; (II) screening of DEM variables; (III) surrogate modeling...
journal article 2021
Searched for: subject%3A%22Contact%22
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