Searched for: department%3A%22Aerospace%255C+Structures%255C+and%255C+Materials%22
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Simbolon, M.R. (author)
Previous study in Structural Integrity and Composite group showed that creepforming Dyneema fiber into hemispherical helmet preform is indeed possible. However, the set-up in conventional set-up was complex and a long time was required to generate uniform temperature across the material. This thesis will investigate the possibility of using...
master thesis 2015
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Hertgers, S.W. (author)
In aeroelastic research the interaction between the structural wing and the aerodynamics is investigated. Currently the wingbox structures, as other components, are manufactured out of composite materials to replace the metallic airplanes. Composites have the ability to be designed by defining the orientation and thickness of a laminate. This...
master thesis 2015
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Papenhuijzen, W.M. (author)
A method has been developed for designing composite 3D skeletal structures. This method can be used to design weight optimized fiber reinforced structures that can carry complex loads in high performance applications such as satellites. These designs are realized through Size, Shape and Topology Optimization, using a ground structure approach as...
master thesis 2017
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Verwer, K. (author)
Induction heating is used to heat offshore pipeline field joints to a required temperature for application of anti-corrosion coatings. The objective of induction heating is to obtain a uniform surface temperature of typically 230 ± 10 °C in a time-span of minutes. The desired temperature profile of the field joint, also known as heat profile is...
master thesis 2016
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Lin, Y.-H. (author)
A flap actuation system, the Controllable Rubber Trailing Edge Flap (CRTEF), for distributed load control on a wind turbine blade had been developed in the period from 2006 to 2013 at DTU. The purpose of the project is to optimize the structural design of the flexible part of the CRTEF based on a realistic blade section geometry in order to meet...
master thesis 2016
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Dieleman, C.D. (author)
Aluminium AA2024-T3 is a high strength aluminiumalloy widely used in aerospace. The strengthening copper-rich intermetallic phases, however, make the material very susceptible to aqueous corrosion and severe pitting. To protect the metal, coatings loaded with corrosion inhibitors are typically used. Traditionally, highly efficient CrVI-based...
master thesis 2016
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Rueda Ruiz, M. (author)
Thermal barrier coatings (TBC) are often applied to hot components of modern turbojet engines. These coatings increase the performance of the engine and enhance the lifetime of its structural components. Thus, improving the TBC lifetime is related with a reduction of maintenance costs and increased reliability. As an alternative to conventional...
master thesis 2016
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Moors, G. (author)
This thesis continues the work performed by Ferreira and Almeida on the topic of weight and cost reduction of composite multi-spar torsion-bending boxes. The goal is to find the influence of changes to the structural configuration on the resulting weight of said torsion-bending boxes. Using analytical methods, combined into the BoxSolver MATLAB...
master thesis 2016
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Gramsma, M.E. (author)
This thesis investigates the self-healing mechanisms of deformation-induced defects in ferritic Fe-Au(-B-N) and Fe-Mo alloys, by segregation and precipitation of Au elements and Fe2Mo compounds. For this purpose, cyclic tensile tests on the Fe-Au(-B-N) alloys are conducted interrupted with isothermal ageing steps at 550 °C. Coincidence Doppler...
master thesis 2015
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Tombrock, A.J.C. (author)
DP600 HR is one of Tata Steels hot rolled products. It is a dual phase steel unique to Tata Steel for its two step cooling process and low coiling temperature. The finished product has encountered several surface defects, one of which are imprints. In order to find the root cause for the imprints a literature study, a factory inspection and a...
master thesis 2016
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Witt, W. (author)
Within the aeronautical industry product quality is an inevitable key factor to guarantee safety and customer satisfaction. In the last years the increasing complexity of modern aircraft, however, has led to an immense demand for collaboration of different manufacturers in order to stay competitive. Therefore, there is an increasing interest in...
master thesis 2016
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Hogeveen, J.J. (author)
Conventional theories to describe and predict FCG are based on a SIF parameter, ΔK. If ΔK is used as similitude parameter to predict FCG, an R-effect arises. This R-effect can be accounted for by means of plasticity induced crack closure: A plastic wake behind the crack tip causes the crack to close before a zero tensile load is applied. As such...
master thesis 2016
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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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Wang, L. (author)
master thesis 2016
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Broek, C.A. (author)
The interest of the aerospace industry in thermoplastic composites has increased over the last years. One of the advantages of using thermoplastics over thermosets is the possibility to use thermoplastic welding as a joining technique. Ultrasonic welding is considered one of the most promising variants: it is very fast, results in high-quality...
master thesis 2015
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Peters, K.R. (author)
The goal of the thesis (executed for Fokker Aerostructures) was to further the understanding of critical parameters in the DCB test method for thermoplastic composites. The influence of fiber bridging, specimen thickness, insert film thickness, crack length and crack opening rate are investigated by means of experimental DCB tests for...
master thesis 2017
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Wilken, A.P. (author)
FiberCore Europe is a Dutch company, specialized in the design and manufacturing of composite, load-bearing structures for architecture and infrastructure. The company’s main focus is on bridges and lock gates made from glass fiber reinforced polymer (GFRP). The price for currently produced GFRP bridges longer than approximately 26 meter is...
master thesis 2016
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Enganati, S.K. (author)
Ultra-High Molecular Weight Polyethylene (UHMwPE) fibers are well known for their very high specific mechanical properties such as tensile strength and Young’s modulus. The solution spinning/solid state drawing process invented in the late 70s at DSM enables the production of these UHMwPE fibers with outstanding mechanical properties. The...
master thesis 2016
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Hangx, R, (author)
In the development of materials used for constructing aircraft, progress has been made in the production, certification and implementation of materials such as Carbon Fibre Reinforced Polymer (CFRP) and Glass Laminate Aluminium Reinforced Epoxy (GLARE). The state-of-the-art in joining techniques however, has not changed much: fastening is still...
master thesis 2017
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Groeneboom, B. (author)
AE-based structural integrity monitoring of composite structures potentially offers the means to gain knowledge on in-service damage accumulation, as well as mitigation of some of the risks associated with in-service damage. However, validation of any identified classes of AE events with regard to their underlying source mechanics is generally...
master thesis 2016
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