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Ferreira da Costa, Tiago (author)
This research delves into aircraft crashworthiness, focusing on the innovative Flying-V configuration, aiming to improve safety in unconventional designs. Challenges arise due to the Flying-V's unique V-shaped fuselage, complicating traditional crashworthiness assessments. To address this, the study proposes modelling approaches, particularly...
master thesis 2024
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Chalabi, Wissam (author)
Optimizing the routes of firefighting aircraft can reduce the time it takes to contain wildfires and make sure they remain within control. In this paper, a novel formulation of the Vehicle Routing Problem (VRP) is developed to improve aerial firefighting operations by optimizing aircraft routes. The formulation is a capacitated split delivery...
master thesis 2023
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Niehaus, Anya (author)
Pistons for reciprocating compressors for industrial applications are often made of specialised materials. These prove to have problems with manufacture due to the high quality and short production times needed in combination with a low production volume per design. Additive manufacturing, specifically selective laser melting, could solve the...
master thesis 2022
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Savana, Reshab (author)
The growing demand for renewable energy has led to significant developments in wind turbine technology. The ever increasing size of turbine blades and their exposure to a variety of environmental factors can affect their annual energy production and service life. Erosion caused by rainfall and hailstones is identified as two of the most...
master thesis 2022
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Bîrgăoanu-Acăei, Ioan (author)
One of the emerging welding techniques for thermoplastic composites is ultrasonic welding. Ultrasonic spot welding has the potential to be composite counterpart of the widely used, highly automatized spot welding technique used to join metals. State of the art research on ultrasonic welding is focusing on the welding process itself in search of...
master thesis 2022
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van 't Hof, Nathan (author)
The purpose of this research study is to analyse the effect of the design of mechanical fastener on their effectiveness as Disbond Arrest Features (DAFs). This was done by means of a sensitivity study using a 3D model using the Virtual Crack Closure Technique (VCCT) to model the disbond growth of a single lap shear specimen comparing the Strain...
master thesis 2021
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Hofwegen, Mark (author)
To expand the use of additive manufacturing in aerospace towards more critical applications, it is required to design parts in a damage tolerant context. Therefore, the damage tolerance of additive manufactured multiple load path structures is assessed by analysing the fatigue life and damage propagation of components with increasing redundancy....
master thesis 2021
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Haegens, Tobias (author)
This research focuses on the possible causes of variation in the tensile strength and stiffness of witness specimens that are used in the manufacturing of aerospace grade selective laser sintered parts. Using specimens and data obtained from Materialise of the PA2241FR samples, the crystallinity and porosity of the samples was determined. The...
master thesis 2021
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Ertman, Katharina (author)
To create a more sustainable future for aviation, new, lighter-weight structures and materials will need to be engineered. It will also be critical that damage tolerance and safety are not compromised in the process. Lattice materials represents one avenue of exploration; however, two key challenges arise: limited experimental work has been...
master thesis 2020
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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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Lagerweij, Bram (author)
Complex structural shapes can be produced with additive manufacturing. The geometrical complexity that can be achieved translates into an increase in possible designs. Designing these structures with traditional methods is difficult. A design process with computational optimization will enable engineers to use the geometrical freedom offered by...
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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Cheylus, Thomas (author)
This master thesis investigates the effect of surface morphology of Selectively Laser Melted Ti-6Al-4V on fatigue performance. The literature study performed here iden- tifies roughness as one of three major causes for the decreased performance of the additive manufactured alloys (along side porosity and residual stresses). In order to eliminate...
master thesis 2017
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Marshall, Andrew (author)
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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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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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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Michielssen, J. (author)
This research investigates the effect of a varying build orientation and different heat treatment on the crack propagation properties of SLM Ti-6Al-4V. Both crack propagation rate and direction are investigated. Fatigue tests are performed with a constant cyclic load and single edge notch specimens. Ten unique types of specimens were tested by...
master thesis 2017
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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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Zhelyazkov, E.S. (author)
Damage is found in resin rich bead corner radii of RTM 6 epoxy-based composite ribs due to in-service thermal-mechanical loading after an aircraft inspection. The same types of damage are obtained through pure thermal cycling of a single bead. However, thermal cycling is a time-consuming process. Therefore, a faster way of damage investigation...
master thesis 2016
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