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Awasthy, Nikhil (author), Schlangen, E. (author), Hordijk, Dick (author), Šavija, B. (author), Lukovic, M. (author)Concrete is characterized in terms of its engineering properties, mainly strength and stiffness, which are subsequently used in structural design. However, the apparent (i.e., measured) concrete properties are not intrinsic but dependent on the conditions under which the measurement is performed. Herein a combined experimental and numerical...journal article 2023
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Waterval, N. F.J. (author), Brehm, M. A. (author), Veerkamp, K. (author), Geijtenbeek, T. (author), Harlaar, J. (author), Nollet, F. (author), van der Krogt, M. M. (author)To maximize effects of dorsal leaf ankle foot orthoses (AFOs) on gait in people with bilateral plantarflexor weakness, the AFO properties should be matched to the individual. However, how AFO properties interact regarding their effect on gait function is unknown. We studied the interaction of AFO bending stiffness with neutral angle and...journal article 2023
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Wang, H. (author), Lehane, B. M. (author), Bransby, M. F. (author), Wang, L. Z. (author), Hong, Y. (author), Askarinejad, A. (author)This paper presents a synthesis of recent and new research conducted by the authors on laterally loaded monopiles in drained sand. The research involved reduced-scale field tests, centrifuge model tests, finite element (FE) simulations and comparisons of design approaches with published experimental data. The influence of the monopile base on...journal article 2023
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Bastek, Jan Hendrik (author), Kumar, Siddhant (author), Telgen, Bastian (author), Glaesener, Raphaël N. (author), Kochmann, Dennis M. (author)Inspired by crystallography, the periodic assembly of trusses into architected materials has enjoyed popularity for more than a decade and produced countless cellular structures with beneficial mechanical properties. Despite the successful and steady enrichment of the truss design space, the inverse design has remained a challenge: While...journal article 2022
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Khoshmanesh, S. (author), Watson, S.J. (author), Zarouchas, D. (author)Wind turbine blade spar cap to shear web adhesively bonded connections can suffer from damage at the bond-line which can propagate through the structure compromising blade integrity. This study investigates changes in the stiffness and damping of a thick adhesive joint test specimen during a fatigue test. The stiffness is calculated using an...journal article 2022
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Jing, R. (author), Varveri, Aikaterini (author), Liu, X. (author), Scarpas, Athanasios (author), Erkens, S. (author)Bitumen ageing is one of the principal factors causing the deterioration of asphalt pavements. As bitumen ages, the pavement loses its ability to relax stresses during loading/unloading and thermal cooling process, thus the risk of cracking increases. Oxidation and ultraviolet (UV) radiation are believed to be the main factors that can cause...book chapter 2021
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Fleischer, J.C. (author), Diehl, J.C. (author), Wauben, L.S.G.L. (author), Dankelman, J. (author)Three-dimensional (3D) printing may be a solution to shortages of equipment and spare parts in the healthcare sector of low- and middle-income countries (LMICs). Polylactic acid (PLA) for 3D printing is widely available and biocompatible, but there is a gap in knowledge concerning its compatibility with chemical disinfectants. In this study, 3D...journal article 2020
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Griffioen, M. (author), van Drunen, P. (author), Maaswinkel, E. (author), Perez, R. S.G.M. (author), Happee, R. (author), van Dieën, J. H. (author)Purpose: The goal of this study was to assess differences in low back stabilization and underlying mechanisms between patients with low back pain (LBP) and healthy controls. It has been hypothesized that inadequate trunk stabilization could contribute to LBP through high tissue strains and/or impingement. Evidence to support this is...journal article 2020
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Schut, I.M. (author), Pasma, J.H. (author), Roelofs, J. M.B. (author), Weerdesteyn, V. (author), van der Kooij, H. (author), Schouten, A.C. (author)Changes in human balance control can objectively be assessed using system identification techniques in combination with support surface translations. However, large, expensive and complex motion platforms are required, which are not suitable for the clinic. A treadmill could be a simple alternative to apply support surface translations. In...journal article 2020
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Hoevenaars, A.G.L. (author), Krut, S. (author), Herder, J.L. (author)The dynamic performance of a parallel manipulator is often limited by its natural frequencies. These frequencies are a result of the controlled actuator stiffness and the mechanical design. Typically, only the lowest natural frequencies are of interest. However, existing methods to analyze natural frequencies of parallel manipulators with...journal article 2020
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Waterval, Niels F.J. (author), Nollet, Frans (author), Harlaar, J. (author), Brehm, Merel Anne (author)BACKGROUND: To improve gait, persons with calf muscle weakness can be provided with a dorsal leaf spring ankle foot orthosis (DLS-AFO). These AFOs can store energy during stance and return this energy during push-off, which, in turn, reduces walking energy cost. Simulations indicate that the effect of the DLS-AFO on walking energy cost and...journal article 2019
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Bier, H.H. (author), Wang, Qinyu (author), Teuffel, Patrick (author), Senatore, Gennaro (author)The environment around buildings keeps changing, while the static design solutions of buildings cannot perform well during the whole service life. In order to improve structural performances including strength (i.e. avoid collapse) and serviceability, adaptive structures are likely to establish as one of future trends in both research and...journal article 2019
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Jing, R. (author), Liu, X. (author), Varveri, Aikaterini (author), Scarpas, Athanasios (author), Erkens, S. (author)Asphalt mortar is a mixture of bitumen, filler, and sand. Mortar plays an important role in asphalt mixtures as it serves as the adhesive between the coarser aggregates. Due to the effect of bitumen ageing, the chemical and mechanical properties of asphalt mortar evolve with time. The mortar becomes more brittle and prone to cracking, thus...journal article 2018
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Vitalis, Dimitrios (author), Veer, F.A. (author), Oikonomopoulou, F. (author)This paper describes the engineering steps taken in order to investigate the potential of glass sandwich elements, made of 2 glass skins separated by a glass core in the form of spacers, as a way to create planar elements with a high stiffness to weight ratio, reducing material consumption in structural glazing applications. The aim is to...conference paper 2018
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Mirahmadi, F. (author), Koolstra, J. H. (author), Fazaeli, S. (author), Lobbezoo, F. (author), van Lenthe, G. H. (author), Snabel, J. (author), Stoop, R. (author), Arbabi, V. (author), Weinans, Harrie (author), Everts, V. (author)Objective: Aging can cause an increase in the stiffness of hyaline cartilage as a consequence of increased protein crosslinks. By induction of crosslinking, a reduction in the diffusion of solutions into the hyaline cartilage has been observed. However, there is a lack of knowledge about the effects of aging on the biophysical and biochemical...journal article 2018
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Strachinaru, Mihai (author), Bosch, Johan G. (author), van Dalen, Bas M. (author), van Gils, Lennart (author), van der Steen, A.F.W. (author), de Jong, N. (author), Geleijnse, Marcel L. (author), Vos, H.J. (author)The propagation velocity of shear waves relates to tissue stiffness. We prove that a regular clinical cardiac ultrasound system can determine shear wave velocity with a conventional unmodified tissue Doppler imaging (TDI) application. The investigation was performed on five tissue phantoms with different stiffness using a research platform...journal article 2017
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Hichert, M. (author), Abbink, D.A. (author), Kyberd, P.J. (author), Plettenburg, D.H. (author)Background It is generally asserted that reliable and intuitive control of upper-limb prostheses requires adequate feedback of prosthetic finger positions and pinch forces applied to objects. Bodypowered prostheses (BPPs) provide the user with direct proprioceptive feedback. Currently available BPPs often require high cable operation forces,...journal article 2017
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Leegwater, G.A. (author), Scarpas, Athanasios (author), Erkens, S. (author)Asphalt concrete has the advantageous ability to heal. During rest<br/>periods, damage present In the material is restored to a certain extent.<br/>Healing of the material can be observed in iis regaining of strength<br/>and stiffness after rest periods. In this paper, a new test method is presented.<br/>It was developed to increase the...journal article 2016
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Florio, E. (author), Berti, C. (author), Kasbergen, C. (author), Villani, M.M. (author), Scarpas, Athanasios (author), Erkens, S. (author), Sangiorgi, Cesare (author), Lantieri, Claudio (author)This paper describes a project that is part of NL-LAB, a larger, long-term program at Delft University of Technology, Netherlands, which aims to establish the predictive capacity of the current European functional tests for Dutch asphalt concrete (AC) mixtures. In this NL-LAB program, the functional characteristics of resistance to rutting (EN...conference paper 2014
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With, C. (author), Metrikine, A.V. (author), Bodare, A. (author)As the demand for predictions of train-induced vibrations is increasing, it is essential that adequate parameters of the railway structure are given as input in the predictions. Gathering this information can be quite time-consuming and costly, especially when predictions are required for the low-frequency emission. This article presents a...journal article 2009
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