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Borcea, Ciprian S. (author), Broeren, F.G.J. (author), Herder, J.L. (author), Streinu, Ileana (author), van der Wijk, V. (author)Auxetic behavior refers to lateral widening upon stretching or, in reverse, lateral shrinking upon compression. When an initially auxetic structure is actuated by compression or extension, it will not necessarily remain auxetic for larger deformations. In this paper, we investigate the auxetic range in the deformation of a periodic framework...journal article 2021
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Pascoe, J.A. (author)Using the slow-growth certification approach for damage tolerance of composite aircraft structures has the potential to reduce their weight. Applying this approach requires that damage growth is slow, stable, and predictable. However, currently available methods do not allow for sufficiently accurate predictions, due to knowledge gaps related...journal article 2021
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Harteveld, M.G.A.D. (author)This commentary aims to provide a window on the future by studying actions, taken to control the spreading of the corona virus, while obviously affecting public space over a year. What has been the effects on public space directly linked to these actions during the pandemic; what values play a role, and what can we expect for the future? We have...journal article 2021
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Zhang, Youyou (author), Xin, H. (author), Correia, José A.F.O. (author)The development of numerical simulation for Ultra-high-performance concrete (UHPC) and Ultra-high-performance fiber-reinforced concretes (UHPFRC) is fundamental for the design and construction of related structures. The simplified engineering stress-strain relationship and the input values are necessary in the finite element modeling. Four...journal article 2021
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Vesper, J.E. (author), Obiji, Chibuikem S. (author), Westerwaal, Ruud (author), Boelsma, Christiaan (author), Kenjeres, S. (author), Kleijn, C.R. (author)In recent years, Physical Vapor Deposition has been advanced to a continuous process which makes it amenable for in-line, high-quality and energy-efficient galvanization. To achieve the high and uniform mass flow required for in-line production, a Vapor Distribution Box is used, in which the zinc is evaporated. The zinc fills the Vapor...journal article 2021
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Chen, Jianyu (author), Daverveldt, Maurice (author), Al-Ars, Z. (author)With the continued increase in the amount of big data generated and stored in various application domains, such as high-frequency trading, compression techniques are becoming ever more important to reduce the requirements on communication bandwidth and storage capacity. Zstandard (Zstd) is emerging as an important compression algorithm for big...conference paper 2021
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Hu, W. (author), Hickel, S. (author), van Oudheusden, B.W. (author)The low-frequency unsteady motions behind a backward-facing step (BFS) in a turbulent flow at and are investigated using a well-resolved large-eddy simulation. The instantaneous flow field illustrates the unsteady phenomena of the shock wave/boundary layer interaction (SWBLI) system, including vortex shedding in the shear layer, the flapping...journal article 2021
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Wan, Z. (author), Xu, Y. (author), Šavija, B. (author)Compressive strength is the most significant metric to evaluate the mechanical properties of concrete. Machine learning (ML) methods have shown promising results for predicting compres-sive strength of concrete. However, at present, no in-depth studies have been devoted to the influence of dimensionality reduction on the performance of...journal article 2021
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Li, Ye (author), Mirza Gheytaghi, Amir (author), Trifunovic, M. (author), Xu, Yuanxing (author), Zhang, Kouchi (author), Ishihara, R. (author)3D integration has well-developed for traditional CMOS technology operating at room temperature, but few studies have been performed for cryogenic applications such as quantum computers. In this paper, a wafer-to-wafer bonding of superconductive joints based on niobium nitride (NbN) is performed to demonstrate the possibility of 3D...journal article 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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de Leeuw den Bouter, M.L. (author), van den Berg, P.M. (author), Remis, R.F. (author)In this paper we discuss an imaging method when the object has known support and its spatial Fourier transform is only known on a certain k-space undersampled pattern. The simple conjugate gradient least squares algorithm applied to the corresponding truncated Fourier transform equation produces reconstructions that are basically of a similar...journal article 2021
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Li, Cong (author), Ding, Zhili (author), van der Zwaag, S. (author)Isothermal hot compression tests of two promising new titanium alloys (Ti-10 V-1Fe-3Al and Ti-10 V-2Cr-3Al) are performed using a TA DIL805D deformation dilatometer at temperatures in and above the two-phase α + β region (730–880 °C) at strain rates ranging from 10<sup>−3</sup> to 10<sup>−1</sup> s<sup>−1</sup>. Results show that the flow...journal article 2021
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Thari, Ali (author), Pasquariello, Vito (author), Aage, Niels (author), Hickel, S. (author)We present an adaptive reduced-order model for the efficient time-resolved simulation of fluid–structure interaction problems with complex and non-linear deformations. The model is based on repeated linearizations of the structural balance equations. Upon each linearization step, the number of unknowns is strongly decreased by using modal...journal article 2021
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Bernardini, Matteo (author), Modesti, D. (author), Salvadore, Francesco (author), Pirozzoli, Sergio (author)We present STREAmS, an in-house high-fidelity solver for direct numerical simulations (DNS) of canonical compressible wall-bounded flows, namely turbulent plane channel, zero-pressure gradient turbulent boundary layer and supersonic oblique shock-wave/boundary layer interaction. The solver incorporates state-of-the-art numerical algorithms,...journal article 2021
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Mc Carthy, Robert (author)Of the many challenges involved in developing reliable and sustainable spaceflight, perhaps none are so dangerous and difficult to study as the aerothermodynamic conditions involved when re-entering the atmosphere. These dangerous conditions typically occur due to a variety of flow phenomena, one of which is shock—boundary-layer interactions ...master thesis 2020
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Hu, W. (author)The backward/forward-facing step (BFS/FFS) is one of the canonical geometries in aerospace engineering applications, the flow field over which has attracted extensive attention in the past decades. In a supersonic flow, laminar-to-turbulent transition and shock wave/boundary layer interaction (SWBLI) can occur over these configurations, which...doctoral thesis 2020
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Hokke, Olivier (author)Many games played on the mobile phone have become large in download size. A significant portion thereof is due to the many textures that are involved. However, many games have art styles that include clean drawings with gradients, solid colors, and hard lines. We observe that these images’ areas may be more efficiently described by interpolating...master thesis 2020
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Lee, Ching (author)Within the context of Hong Kong, it is discovered that the extremely compressed landscape of Hong Kong gives rise to a potential that people would negotiate and define their territories through their habits. In a sense, the conventional practice of architecture in Hong Hong has been transformed and adapted to the notion of compression. Whereby,...master thesis 2020
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Dhingra, Kriti (author)Magnetic Resonance Imaging is a painless procedure to produce high-resolution diagnostic images. Today, it is one of the essential clinical imaging modalities. One of the major challenges involved with this imaging modality is its long scanning time. Parallel imaging in combination with compressed sensing has overcome this challenge to a great...master thesis 2020
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Sharma, Shubham (author), Coutino, Mario (author), Chepuri, Sundeep Prabhakar (author), Leus, G.J.T. (author), Hari, K. V.S. (author)The design of feasible trajectories to traverse the k-space for sampling in magnetic resonance imaging (MRI) is important while considering ways to reduce the scan time. Over the recent years, non-Cartesian trajectories have been observed to result in benign artifacts and being less sensitive to motion. In this paper, we propose a generalized...journal article 2020