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Douma, Timo (author)Bent up bars were prescribed as shear reinforcement in the first half of the twentieth century, stirrups after the 1960’s. In current Eurocode, bent up bars can be applied again, but restrictions with respect to the maximum shear strength should be followed. Goal of this report is to provide background for this shear strength restriction and...master thesis 2023
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van den Doel, Gregor J. (author), Herder, J.L. (author), Farhadi Machekposhti, D. (author)The ability to convert reciprocating, i.e., alternating, actuation into rotary motion using linkages is hindered fundamentally by their poor torque transmission capability around kinematic singularity configurations. Here, we harness the elastic potential energy of a linear spring attached to the coupler link of four-bar mechanisms to...journal article 2023
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Li, Jiaze (author), Claude, Nicolas (author), Tassi, Pablo (author), Cordier, Florian (author), Crosato, A. (author), Rodrigues, Stéphane (author)Active geomorphological interventions, such as reprofiling of river bars, are often used to increase bar dynamics and prevent vegetation encroachment. River restoration management should be planned based on the knowledge of what processes will follow the intervention and on the anticipation of the consequences. However, in many cases, the...journal article 2023
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Yilmaz, Fidel (author)When concrete is subjected to imposed deformations, stresses may develop. If at any point in time this stress exceeds the tensile strength of the material, the concrete will crack. Early-age cracking of concrete structures may lead to problems with durability, serviceability and aesthetics. During hardening of concrete the material properties...master thesis 2022
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Zomerdijk, M.J.J. (author), van der Wijk, V. (author)Industrial robotic manipulators in pick-and-place applications require short settling times to achieve high productivity. The fluctuating reaction forces and moments on the base of a dynamically unbalanced manipulator, however, cause base vibrations, leading to increased settling times. These base vibrations can be eliminated with dynamic...journal article 2022
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- Alahmady, Gamal (author), Crosato, A. (author), Werner, Micha (author) conference paper 2022
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- Gamal Mezieda, Mohammed (author), Siele, Meles (author), Crosato, A. (author) conference paper 2022
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Meijaard, J.P. (author), van der Wijk, V. (author)The dynamic balancing of flexible mechanisms, that is, the reduction or elimination of shaking forces and shaking moments on the support structure, is considered. Two approaches are pursued: one uses similarity and the other modal balancing. A single rotating link can be balanced by a properly scaled countermass, for which balancing criteria...journal article 2022
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Prem, Prabhat R. (author), Šavija, B. (author)A precise prediction of the ultimate bond strength between rebar and surrounding concrete plays a major role in structural design, as it effects the load-carrying capacity and serviceability of a member significantly. In the present study, Gaussian models are employed for modelling bond strength of ribbed steel bars embedded in concrete....journal article 2022
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Dehgahi, S. (author), Pirgazi, H. (author), Sanjari, M. (author), Seraj, P. (author), Odeshi, A. (author), Kestens, L.A.I. (author), Mohammadi, M. (author)The deformation performance of maraging steel samples fabricated using the laser powder bed fusion technique was evaluated using the split Hopkinson torsion bar (SHTB) test. Thin-walled tubular maraging steel samples were deformed under dynamic torsional loading at strain rates of 260 s<sup>−1</sup> to 720 s<sup>−1</sup> using twist angles...journal article 2022
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van Maanen, Gerard (author)The coastline near Domburg, in the southwest delta of the Netherlands, has been preserved with sand for three decades. Maintenance was conducted on the beach between the low water line and the dune foot every 4 years. To extent this interval, a shoreface nourishment was implemented in 2017 and was supplemented with a beach nourishment in 2019....master thesis 2021
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Chilagani, Shivendra Kaushik (author)Graphene is two-dimensional allotrope of carbon with a honeycomb-like lattice structure. It shows exceptional properties in electrical, optical, thermal, mechanical and chemical fields. And due to its excellent properties, it is being researched to be used in many applications such as, sensors, graphene transistors, opto-electronics, etc. To...master thesis 2021
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Rovers, Stijn (author)The Lunar Zebro is a small six-legged robot. It has the potential to be used in a swarm carrying out objectives like exploring planetary surfaces. A new step towards autonomous navigation is made with the newly developed Obstacle Processing ALgorithm (OPAL) using primarily open-source libraries. This study showed that the initial iteration of...master thesis 2021
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- Montijn, Roline (author), Mosselman, E. (author), Sloff, C.J. (author) poster 2021
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van der Wijk, V. (author)In this paper it is shown how a 2-DoF inherently force balanced spatial deployable Butterfly Linkage is found consisting of four entangled similar Bennett linkages moving synchronously and with the common center of mass in the central joint. This linkage is derived from the Grand 4R Four-Bar Based Inherently Balanced Linkage Architecture by...book chapter 2021
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Kumar, S. (author), Ghosh, D. (author), Donselaar, Rick (author), Burgers, F. (author), Ghosh, Ashok Kumar (author)Shallow aquifers in many Holocene alluvial basins around the world have in the last three decades been identified as arsenic pollution hotspots, in which the spatial variation of natural (or: geogenic) arsenic concentration is conditioned by the meandering-river geomorphology and the fluvial lithofacies distribution. Despite the large amount of...journal article 2021
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Morphodynamic modeling the impact of large-scale embankment on the large bar in a convergent estuaryXie, Dongfeng (author), Wang, Zhengbing (author), van der Wegen, Mick (author), Huang, Junbao (author)Many alluvial estuaries worldwide include an inside bar system, a large sediment deposit deeply stretched into the estuary. A good example of such a system is the large sediment deposit in the Qiantang Estuary, China. Its length and height reach 130 km and 10 m, respectively. Bathymetrical comparison reveals that the large bar has moved seaward...journal article 2021
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Holzhauer, H. (author), Borsje, Bas W. (author), van Dalfsen, Jan A. (author), Wijnberg, Kathelijne M. (author), Hulscher, Suzanne J.M.H. (author), Herman, P.M.J. (author)The composition of benthic species communities in the nearshore zone is closely related to the hydrodynamic and morphodynamic conditions. Sustainable management of the coastal ecosystem requires knowledge about the natural dynamics as well as human-induced changes on the ecosystem. To improve our knowledge of the benthic species distribution...journal article 2020
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Crosato, A. (author), Mosselman, E. (author)River training and river restoration often imply modifying the patterns and dimensions of bars, channels, and pools. Research since the 1980s has greatly advanced and matured our knowledge on the formation and behavior of river bars, thanks to field work, laboratory experiments, theoretical analyses, and numerical modelling by several research...review 2020
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van der Wijk, V. (author)Considering balancing as starting point in the design of mechanisms and manipulators is known as inherent balancing. Inherently balanced linkage architectures then form the basis from which balanced mechanism solutions are synthesized, needing no countermasses contrary to balancing of given mechanisms. In this paper a new and advanced...journal article 2020