Searched for: subject:"shell"
(1 - 20 of 149)

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van Tongeren, Edwin (author)
Previous research proved the potential of using mussel shell waste as additive manufacturing (AM) material. In this thesis, mussel shell powder was combined with sodium alginate, since it allows reversible cross-linking. Due to reversible cross-linking, this water-soluble and recyclable material can temporarily be made water-resistant, so it can...
master thesis 2020
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Khouzani, Mahdi Kiani (author), Bahrami, Abbas (author), Yazdan Mehr, M. (author), van Driel, W.D. (author), Zhang, Kouchi (author)
This paper aims to investigate the synthesis, structure, and optical properties of SiO<sub>2</sub> @YAG:Ce core–shell optical nanoparticles for solid state lighting applications. YAG:Ce phosphor is a key part in white light emitting diodes (LEDs), with its main functionality being the generation of yellow light. Generated yellow light from...
journal article 2020
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Guzzo Falci, Catarina (author), Ngan-Tillard, D.J.M. (author), Hofman, Corinne L. (author), van Gijn, Annelou (author)
In this study, we generate novel insights regarding bodily ornaments from indigenous societies of late precolonial Greater Antilles. Previous research has highlighted the sociopolitical role of valuable, exotic, and figurative ornaments, yet there are many gaps in our current understanding of these artifacts. Here, we focus on ornaments from...
journal article 2020
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Karim, Madina (author)
In the past decades, gas productions in the province of Groningen in The Netherlands have caused a significant amount of shallow human-induced earthquakes. Its building stock has shown to be highly vulnerable to these unexpected events. Among various building typologies, damage has been reported for approximately 12.9% of the churches in...
master thesis 2019
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Eberlein, David (author)
Guidelines dating back 50 years, NASA SP-8007, are employed today in the design of thin-walled launch vehicle structures. Due to advances in materials, structural designs, and manufacturing techniques since the publication of SP-8007, the development of new knockdown factors for contemporary launch vehicle structures is an ongoing subject of...
master thesis 2019
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Westsson, E.E. (author)
The increasing energy demand of the world population in combination with tangible climate change effects stemming from rising carbon dioxide emissions is currently characterizing a large portion of the political and societal debate. Despite huge technological advancement in the field of renewable energy resulting in energy prices lower than that...
doctoral thesis 2019
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Vis, Simone (author)
During oil drilling, the position of wells is indirectly determined by measurements near the drilling bit. However, the measurements are disturbed by noise causing errors in the measurements. It is important for large oil companies like Shell to determine the position of wells with a certain degree of uncertainty. Therefore, the main objective...
bachelor thesis 2019
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Damen, Wilfried (author)
Cast glass is a promising structural material that has seen increasing use in the build environment over the last year. It offers a great freedom of shape for designers and engineers, beyond the two-dimensional float glass that is still primarily used. Despite this, cast glass in practice has only been used for solid bricks, mimicking...
master thesis 2019
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van der Weijst, Felix (author)
Glass is a material that has a high compressive strength and a low tensile strength. While being mostly produced as flat sheets of float glass, it can also be casted into components that have a thicker geometry and thus a higher buckling resistance. These properties make cast glass components suitable for the construction of shell structures...
master thesis 2019
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Khamis, Karim (author)
Miniaturization of spacecraft has been gaining wide interest in the space industry, given its potential for reducing space missions' costs and providing a novel approach to enhancing and facilitating spaceflight. Recently, a lot of research has been successfully put into this field along with the advancements that make it more feasible, though a...
master thesis 2019
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Kooistra, Hylke (author)
Existing scoliosis braces preclude spinal movement for activities of daily living, which reduces the willingness to wear the brace and treatment success. This work develops a scoliosis brace that meets corrective requirements while retaining patient mobility.<br/>The primary compliance vector (PCV) captures the predominant kinematic degree of...
master thesis 2019
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Broshuis, Ab (author)
Present stroke rehabilitation devices for the arm are often difficult to use by the patient himself and cannot be used at home. A compliant shell mechanism could overcome the shortcomings of the current available devices. By the use of monolithic shell mechanisms a simple to use device can be designed, which can be made wearable. It would make...
master thesis 2019
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Buskermolen, Pim (author)
This thesis aims to provide a better understanding on the relationship between the mechanical and geometrical properties of shell structures. In search hereof, an attempt is made to describe the thrust surface; a geometrical representation of the in-plane force trajectories through a structure. There exists a well-known relation between the...
master thesis 2019
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Xia, Y. (author), Wu, Yue (author), Hendriks, M.A.N. (author)
In current optimization methods for free-form shells, the shape and topology are usually optimized separately. These methods are based on the assumption that the shape and topology of a shell influence each other only slightly, but this is not always correct. Moreover, different parameterization models are used in the shape optimization and...
journal article 2019
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Markestein, Koen (author)
Analysing nonlinear vibrations of any finite element model containing a considerable number of degrees of freedom requires extensive computational resources. For a time-dependent nonlinear analysis, numerous iterations and time increments are required to compute steady statesolutions....
master thesis 2018
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van der Kemp, Stefhan (author)
Passive exoskeletons that support the weight of the surgeon’s arms could yield a significant ergonomic improvement in the Laparoscopic theatre. However, the cost and regulations associated with sterilization complicates adoption of such devices. In this work a compact passive arm support mechanism is designed that can be worn underneath the...
master thesis 2018
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Borg Costanzi, C. (author), Ahmed, Z. Y. (author), Schipper, H.R. (author), Bos, F. (author), Knaack, U. (author), Wolfs, R.J.H. (author)
One of the geometrical restrictions associated with printed paste materials such as concrete, is that material must be self-supporting during printing. In this research paper a new methodology for 3D Printing Concrete onto a temporary freeform surface is presented. This is achieved by setting up a workflow for combining a Flexible Mould...
journal article 2018
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Doornenbal, Barend (author)
Compliant shell mechanisms are thin walled structures that achieve their motion through deformation. Shell mechanisms are of recent interest for designing exoskeletons that are inconspicuous. One of the challenges in designing shell mechanisms is getting as much compliance as possible in certain directions while keeping the other directions...
master thesis 2018
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van der Straten, Guido (author)
Shell structures have been regularly used in the past for creating huge spanning structures, with the use of minimal material. Even though this method saves a lot of material, the labor cost of constructing these structures is high, due to the amount of work on the building site. By prefabricating these structures, a huge amount of labor and...
master thesis 2018
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Kilimatos, Andreas (author)
Shell structures appear quite often in our daily life. From aircraft fuselages to storage silos and boat hulls, these structures are employed for their structural efficiency and the aesthetics they provide. They are characterised by a small thickness in comparison to their other dimensions and by curvature in their unstressed state. Despite...
master thesis 2018
Searched for: subject:"shell"
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