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KIM, Jiheon (author)Repair and maintenance of products require few resources in a circular economy, minimising the environmental impact of manufacturing and use of products. Although lightweight lattice structures have been widely investigated in various fields owing to their advantages in terms of their mechanical characteristics and the development of additive...master thesis 2020
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Chokshi, Shasan (author)This thesis aims to explore various possibilities in grid-structures by introducing atypical line geometries and examine its feasibility in a built environment. The proposition is derived from the larger purpose of adapting native design characteristics in modern built environment. Focusing on the Asian context, one of the essential...master thesis 2020
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Ballapur Jayasimha, Athreya (author)Horizontal Axis Wind Turbines (HAWTs) are a very popular source of renewable energy, but these machines are often subject to off-design conditions owing to the unsteady nature of wind. Unsteady aerodynamic conditions have been associated with cyclic loading of turbine blades, which can have hugely detrimental effects on their operational life....master thesis 2020
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Lee, Joe (author)Composite lattice structures (CLS) offer high performance and demonstrate significant mass savings in space structure applications. Local modifications of regular lattice designs have the potential to further improve the lattice performance. This research explored the micro-structural quality features of CLSs manufactured with pre-preg fibre...master thesis 2019
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Blok, Adriaan (author)Selective laser melting (SLM) is an additive manufacturing technique, which is currently on the rise of being used for manufacturing bone implants. Spinal cage, dental and hip implants can for example be manufactured using SLM. Ti6Al4V lattice structures, categorised as metamaterials, can be printed by SLM with mechanical properties close to...master thesis 2019
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van Helvoort, Derron (author)Additive manufacturing allows material structuring, supporting the fabrication of multiple-level structures or metamaterials. Through the lens of classical stress reduction, nature’s cellular solid structures feature stress-homogenizing nodal topologies. Avian long bones are an example. Research into the mechanics of open cell cellular solids...master thesis 2019
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Dai, Yue (author)A series of accelerated corrosion tests were done by SGS INTRON (commenced by Combinatie Aanpak Maastunnel, constructor of the Maastunnel project) to investigate for a proper repair material for the deteriorated concrete floor in the Maastunnel at Rotterdam. Five types of fiber reinforced mixtures with different tensile behavior ranging from...master thesis 2018
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Wang, Shang-Jen (author)This thesis investigates intrinsic frustrated magnetic systems on an insulating square lattice. The frustrated systems were successfully engineered from magnetic iron atoms on top of an insulating square c(2x2) reconstruction of nitrogen on Cu3Au(100) (copper-gold) surface. Vertical atom manipulation was used to position the magnetic atoms...master thesis 2018
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Nelissen, Wiebe (author)Externally triggered lengthening or shortening (actuation) of one or more members in a lattice material can be used to achieve macroscopic shape changes. The three main attributes looked for in 2D lattice materials to be deemed suitable for actuation are in-plane isotropy, high specific elastic properties and limited energy requirement for...master thesis 2018
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Anselmi, Luca (author)As the suitable locations for large wind farms in the mainland are limited, wind energy generation in the urban environment is gaining interest. The Diffuser Augmented Wind Turbine (DAWT) is a promising concept where the turbine is embedded into an airfoil-shaped diffuser (also named shroud or duct), which has the function of increasing the mass...master thesis 2017
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Gunasekaran, Sandeep (author)For the past fifty years, there has been a constant increase in the pressure ratio of gas turbines motivated by the need to increase the cycle efficiency. This has moved the operating pressure of gas turbine combustor to be above the critical pressure of jet fuels. This increasing trend in pressure of combustor, places the next generation gas...master thesis 2017
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Kamat, Ameya (author)Alkali Silica Reaction (ASR) is one of the degradation mechanisms in concrete that poses a threat to the service life of existing structures. This physio-chemical process is progressive and can affect the the strength, stiffness and stability of concrete structures. A lot of mitigation measures are available to prevent the deleterious effects of...master thesis 2017
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Kamath, Shreya (author)Over the past decade, wind turbine towers have grown taller and wider to support high capacity turbines. It may, therefore, be prudent to investigate materials alternative to steel to mitigate an increase in tower mass, cost, and complexities in transportation & manufacturing associated with the steel towers. The current research focuses on...master thesis 2017
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Epema, Kitso (author)Even though propellers are the oldest form of propulsion, they are still a popular choice for unmanned aerial vehicles (UAVs) and passenger aircraft in certain market segments. If the propellers are mounted on the wing, strong propeller-wing interactions alter the aerodynamic efficiency of the aircraft. Using low-order numerical models, it is...master thesis 2017
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van der Schaft, Luuk (author)The Flying V, a concept aircraft configuration, has been proposed by Airbus and TU Berlin. The initial indications of potential improvements in performance over conventional aircraft gave rise to a continuation of the research. For this, the mass characteristics of the configuration must be explored. <br/><br/>A primary structure concept is...master thesis 2017
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de Boer, T. (author)Both experimental and numerical studies have shown that the crack-bridging is one of the most significant mechanism contributing to the fracture toughness of natural materials like nacre and bone. This study aims to explore if additive manufactured lattice structures can be used to bridge fatigue cracks as well, thereby improving the fracture...master thesis 2017
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Bots, M.J. (author)Cellular solids are characteristically excellent energy absorbers due to their capacity to store large amounts of energy through compression. A bioinspired design approach identified the Pomelo fruit (Citrus Maximus) as a biological role model for energy absorption. Fruit peels’ biologically most important functions lies in the need to provide...master thesis 2017
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Lonsain, J. (author)Aeroelastic analyses traditionally consider the airfoil of a wing to remain rigid, only allowing deformation in the span-wise direction of the wing. Recent investigations have shown the benefits of adding chord-wise flexibility in the trailing edge of a wing, however so far only two-dimensional studies have been carried out. Therefore, the...master thesis 2017
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Kaloritis, G. (author)New concepts for support structures of offshore wind turbines have gained interest in the industry and are examined for intermediate and deep water depths in order to unlock new offshore potential markets. One of the main proposals that has already been commercialized is the three or four leg full height lattice structure. The fatigue assessment...master thesis 2016
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Westerveld, D. (author)Aircraft wings are becoming more flexible, making it important to take this flexibility into account from the start of the design process. With flexible wings, unsteady (time-varying) aerodynamics becomes important. For this reason, an unsteady aerodynamics model was constructed and coupled to an aeroelastic flight mechanics tool. This allows...master thesis 2016