- document
-
Giesen, Stefan (author)Fatigue might be the governing limit state in marine structures mainly induced by the waves and wind. Therefore, using a lap joint for the shell plating to replicate the appearance of a riveted joint for a retro yacht is critical due to the limited fatigue resistance. For this joint type cracks initiated at the root, which should always be...master thesis 2023
- document
-
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
- document
-
de Bruijn, Tom (author)Fatigue is one of the driving limit states in the design of wind turbines, as they are subject to varying loadsfrom winds, waves and gusts. One such governing area is the butt-welded connection from the shell to thering flange. To optimize the tower design and to help focus future research, more insight on the influence ofmaterial properties and...master thesis 2021
- document
-
Verhoeven, Alexander (author)In off-shore structures, the jacket foundations are mainly welded connections in circular hollow sections. These connections exhibit problems in resisting fatigue load. Wrapped composite joints tackle this problem with improved fatigue resistance. However, the material properties are yet unknown. In order to determine the properties on a more...master thesis 2020
- document
-
van den Bos, Niek (author)The field of prognostics on composites is relatively young, and research is focused on constant amplitude fatigue (CAF) loading, whereas variable amplitude fatigue (VAF) loading is more common in actual use-cases. Therefore in this research, the feasibility of different in-situ, data-driven probabilistic models is studied for prognostics on...master thesis 2020
- document
-
Smedes, Erik (author)Back pain and back instability affect close to 80% of the population at some point during their life. One solution is to insert a spinal cage, which results in spinal fusion, meaning two vertebrae fuse together to create one big vertebra. This study focuses on the investigation of both the processing aspects as the design aspects of producing a...master thesis 2020
- document
-
Stegeman, René (author)The fatigue life of asphalt concrete is an important parameter in the functional design of a road construction. In the Netherlands it is determined by the four Point Bending (4PB) test on laboratory prepared specimen. During the past years there is an increase in desire to validate the laid down asphalt pavement to the established functional...master thesis 2020
- document
-
La Porte, Jesse (author)This thesis investigates the potential of a semi-passive trailing-edge flap on a large conceptual wind turbine. The mechanism passively reacts to blade and tower accelerations by changing the airfoil camber, opposing the dynamic loads on the turbine. An active element is present, which influences the mean of the flap oscillation. First, a low...master thesis 2019
- document
-
Beld, Petra (author)Fatigue is an important issue for orthotropic steel deck (OSD) bridges and therefore a design criterium. Cracks will initiate at several locations of the bridge deck. It is likely that a crack at the trough web to deck plate joint at the crossbeam will initiate first. This crack initiates at the weld root and propagates through the deck plate. A...master thesis 2019
- document
-
Harmsen, Stefan (author)This master’s thesis project related inflow conditions to atypical fatigue loading of wind turbines. The research was fully based on experimental data obtained in another project. First an expected fatigue loading was defined based on the mean wind speed and the turbulence intensity. Differences between expected and measured fatigue loading were...master thesis 2019
- document
-
Kopally, Hima (author)Wirebonding is an interconnection technology used to connect a chip to its LED package. It is currently not well understood which wirebond characteristics are best to tailor to prevent the failure of wirebonds. The focus of this thesis is to understand the physics-of-failure of wirebonds via an experimental approach. Therefore, an experimental...master thesis 2018
- document
-
Fikkers, Coen (author)The standard sign gantries at the highways in the Netherlands have different geometrical and structural characteristics than sign gantries in other countries. The sign gantries have in total four oblique columns instead of two straight columns and have a triangular shaped spatial truss beam. The design loads that are currently taken into account...master thesis 2018
- document
-
Premanand, Aravind (author)Fatigue damage is considered to be one of the most critical phenomenon, contributing to the failure of an aircraft structure. Understanding the fatigue mechanism is essential for considering the different technical conditions that influence the fatigue life of structures. In recent years, fatigue tests are accelerated in order to reduce the...master thesis 2017
- document
-
Swierstra, E.P. (author)For the fatigue assessment of welded structures, several design methods are described by the design codes of IIW, Eurocode3 and DNV. The relation between the stress range and cycles to failures were derived from experiments: the SN curves. With the increased accessibility of finite element software to engineers, a more flexible approach emerged:...master thesis 2017
- document
-
Bauer, Q. (author)Previous research showed fracture failure in the outsole of sports footwear. There was no method available for the quantification of the material behavior in with this failure mechanism. Therefor the goal of this research was to develop a mechanical test method for quantification of fatigue fracture behavior of a material when a crack is present...master thesis 2016
- document
-
Tandon, S. (author)A parametric finite element model incorporating virtual crack closure technique was developed in order to determine the critical disbond size and location for disbond growth in an adhesively bonded skin stiffened structure, subjected to uniaxial compression loading. The model was validated using static experimental tests on both pristine and...master thesis 2016
- document
-
Rentoulis, I. (author)Heerema Marine Contractors (HMC) is a contractor that transports and installs large structures at sea. For this purpose, HMC operates four crane vessels of which three are semi-submersibles (Thialf, Balder and Hermod) and one is a mono hull (Aegir). The Balder is equipped with a J-lay tower for pipelay in deep water. During transits, when the...master thesis 2016
- document
-
Dikici, T. (author)The carbon fiber industry is nowadays developing new grades of fibers that combine the high mechanical performance of carbon fibers in composites with more attractive cost structure. These developments are in the direction of heavy tow carbon fibers with tow values ranging from 50 to 60K. Using heavy tow carbon fibers reduces the cost structure...master thesis 2016
- document
-
Subramanian, K. (author)The high stiffness to weight ratio of fibre reinforced composites have been utilized in improving the performance of various structures conventionally designed using metals. One such application is the gangway of the Ampelmann system used to transfer personnel safely from and to the offshore platform in sea. In the current work, a preliminary...master thesis 2016
- document
-
Bied-Charreton, A.D. (author)Splicing technology is used to create fuselage panels due to the maximum width of the aluminium sheets of 60 inches as a result of the production process. A set of designing rules is required for the design of a spliced Glare fuselage resulting in a significant increase in complexity. Friction stir welding of the thin aluminium sheets in Glare...master thesis 2016