Searched for: subject:"impact"
(1 - 20 of 245)

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Naeimi, M. (author)
Rolling contact fatigue (RCF) is an important form of damage in wheels and rails that typically has surface and subsurface cracks. Squats are one of the major RCF defects that occur in the running band of rails and can create high dynamic forces and cause rail fracture if they are not detected and treated in time. In the current research, three...
doctoral thesis 2020
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Nokhbatolfoghahai, A. (author), Navazi, H. M. (author), Groves, R.M. (author)
In this paper, the hybrid Delay-And-Sum (DAS) with Sparse Reconstruction (SR) method was further developed for damage location in composite plates. In composite materials, anisotropy leads to some challenges in using conventional damage location methods, which are developed for isotropic materials. In the hybrid DAS-SR method, the DAS and SR...
journal article 2020
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Zhang, Junhong (author), Liu, Zhiyuan (author), Dai, Huwei (author), Hedayati, R. (author), Yuan, Y. (author), Zhang, Guichang (author)
Bird impact on fan blades poses a serious threat to the operational safety of aircraft engines.In this study, a real bird model of mallard duck was developed using the smooth particle hydrodynamics method based on a CT scan of a mallard duck.The accuracy of the real bird model was verified by comparing the simulation results of the impact on...
journal article 2020
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Saeedifar, M. (author), Saleh, M.A.S.N. (author), El-Dessouky, Hassan M. (author), Teixeira De Freitas, S. (author), Zarouchas, D. (author)
This study is devoted to the damage characterization of Non-Crimp Fabric (NCF), 2D plain-woven (2D-PW) and 3D orthogonal plain-woven (ORT-PW) carbon/epoxy laminates, subjected to compression after multiple-impact loading, using Acoustic Emission (AE). The ultrasonic C-scan images showed that the interlaminar damage area induced by the single and...
journal article 2020
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Peck, David (author)
This report presents the findings from a review of more than one hundred Research & Innovation (R&I) projects under EU Framework programmes FP6 and FP7, dealing with a range of circularity considerations related to product design, manufacturing, use and after-use. Nine independent experts analysed these projects, brought in their own...
report 2020
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Lam, K.L. (author), Zlatanović, L. (author), van der Hoek, J.P. (author)
Recovering resources from wastewater systems is increasingly being emphasised. Many technologies exist or are under development for recycling nutrients such as nitrogen and phosphorus from wastewater to agriculture. Planning and design methodologies are needed to identify and deploy the most sustainable solutions in given contexts. For the...
review 2020
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Rooij, R.M. (author), Rocco, Roberto (author), Hausleitner, B. (author), Newton, C.E.L. (author), Aalbers, K.P.M. (author)
This article describes the TU Delft's 2020 experiences during the pandemic in teaching and learning urban design and planning for (post-)COVID-19 times. The article presents the view why, that and how the themes of spatial resilience<br/>and governance resilience should be emphasized in urbanism curriculums. Additionally, it discusses the value...
journal article 2020
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Wang, N. (author), Heijnen, P.W. (author), Imhof, Pieter (author)
Renewable energy investment is a complex process where multiple actors are often involved with their own, sometimes conflicting, interests. Here we propose a multi-actor multi-objective regional energy system planning approach to help actors gain mutual understanding regarding each other’s optimal investment wishes, in order to advance the...
journal article 2020
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Ge, Jianzhong (author), Chen, Changsheng (author), Wang, Zhengbing (author), Ke, Keteng (author), Yi, Jinxu (author), Ding, Ping Xing (author)
Fluid mud (FM) is a unique sedimentary feature in high-turbidity estuaries, where it can make a rapid contribution to morphodynamics. Insufficient field measurements and fixed-point monitoring lead to deficient understandings of the formation, transport, and breakdown of the FM under extreme weather conditions. A field survey was conducted in...
journal article 2020
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Matthes, Sigrun (author), Lührs, Benjamin (author), Dahlmann, Katrin (author), Grewe, V. (author), Linke, Florian (author), Yin, F. (author), Klingaman, Emma (author), Shine, Keith P. (author)
Aviation can reduce its climate impact by controlling its CO<sub>2</sub>-emission and non-CO<sub>2</sub> effects, e.g., aviation-induced contrail-cirrus and ozone caused by nitrogen oxide emissions. One option is the implementation of operational measures that aim to avoid those atmospheric regions that are in particular sensitive to non-CO...
journal article 2020
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Mulholland, Cara (author), Chan, P.W.C. (author), Canning, Kate (author), Ejohwomu, Obuks (author)
Studies of project success have generally recognised the role that stakeholder management plays in shaping a collective understanding of value. While these studies have typically focused on new builds, few studies have examined stakeholder management at the end of the life of a built asset. This paper draws on a single megaproject case study...
journal article 2020
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van Wijk, J. M. (author), de Hoog, E. (author)
Polymetallic nodules provide an alternative source of valuable metals. Nodules from the seabed of the Clarion Clipperton Zone (CCZ), a prospective mining area, are typically abundant at depths of around 5 ​km. Mining these nodules comprises excavation or pick-up of nodules and hydraulic transport of nodules from the seafloor to the surface....
journal article 2020
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Rattanagraikanakorn, B. (author), Schuurman, M.J. (author), Gransden, Derek I. (author), Happee, R. (author), de Wagter, C. (author), Sharpanskykh, Alexei (author), Blom, H.A.P. (author)
Recent developments in the concept of UAS operations in urban areas have led to risk concerns of UAS collision with human. To better understand this risk, head and neck injuries due to UAS collisions have been investigated by different research teams using crash dummies. Because of the limitations in biofidelity of a crash dummy, head injury...
journal article 2020
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Tonini, Davide (author), Wandl, A. (author), Meister, K.R. (author), Munoz Unceta, P.A. (author), Taelman, Sue Ellen (author), Sanjuan-Delmás, David (author), Dewulf, Jo (author), Huygens, Dries (author)
Food waste represents the largest fraction of the municipal solid waste generated in Europe and its management is associated to suboptimal performance in environmental, health, and social dimensions. By processing detailed multi-fold local data as part of a comprehensive and broadly understandable sustainability framework, this study quantifies...
journal article 2020
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de Almeida Sousa, E. (author), Hofland, B. (author)
This study focusses on increasing the understanding on vertical hydraulic structures with relatively short overhangs subjected to standing wave impacts. To this end, the impact velocity and the entrapped air are studied in detail, given their influence on the impulsive loading characteristics and consequently on the structural dynamic response....
journal article 2020
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Wang, Z. (author), Osseweijer, P. (author), Posada Duque, J.A. (author)
The life cycle human health (HH) impacts related to aviation biofuels have been understood in a limited way. Life cycle impact assessment (LCIA) methods for assessing HH are often associated with a high level of uncertainty and a low level of consensus. As a result, it remains challenging to perform a robust assessment of HH impacts with a...
journal article 2020
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Eilander, Dirk (author), Couasnon, A.A.O. (author), Ikeuchi, Hiroaki (author), Muis, Sanne (author), Yamazaki, Dai (author), Winsemius, H.C. (author), Ward, Philip J. (author)
Current global riverine flood risk studies assume a constant mean sea level boundary. In reality high sea levels can propagate up a river, impede high river discharge, thus leading to elevated water levels. Riverine flood risk in deltas may therefore be underestimated. This paper presents the first global scale assessment of the joint...
journal article 2020
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Ewald, V.A. (author), Groves, R.M. (author), Benedictus, R. (author)
The concept of structural health monitoring has been introduced to ensure structural integrity during the design lifetime of a structure. The main objectives of structural health monitoring are to detect, locate, quantify, and predict any damage that occurs during this lifetime of the structure so that effective and efficient maintenance and...
journal article 2020
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Liu, X. (author), Markine, V.L. (author)
This paper presents the investigation of the root causes of the fast degradation of a railway crossing. The dynamic performance of the crossing was assessed using the sensor-based crossing instrumentation, and the measurement results were verified using the multi-body system (MBS) vehicle-crossing model. Together with the field inspections,...
journal article 2020
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de Almeida Sousa, E. (author), Hofland, B. (author)
The applicability of pressure-impulse theory is evaluated for predicting wave impact loading magnitudes for non-breaking standing wave impacts on vertical hydraulic structures with relatively short overhangs. To this end, tests were carried out on a schematized but realistic configuration with low steepness regular wave impacts on a straight...
journal article 2020
Searched for: subject:"impact"
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