Searched for: department:"Aerospace%5C+Structures%5C+and%5C+Materials"
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Floris, C.E. (author)
Damage in materials and structures is unavoidable, leading to the time deterioration of its functional properties (e.g. barrier, load bearing, aesthetics) and ultimate repair or replacement. Lifetime extension can be achieved by using materials with initially higher performance or using materials that can repair themselves (self-healing). The...
master thesis 2017
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Mishra, V. (author)
Automated fibre placement technology has made possible to place bands of composite fibre tows along curvilinear path to create laminates with spatially varying stiffness properties called variable stiffness panels. These panels have shown improvement in stiffness properties, buckling load and post buckling failure load, over conventional...
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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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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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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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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Wolken, M. (author)
A surrogate model is used to predict the energy dissipation response for a rectangular beam, initiated by an axial impact. This method is used for one type of steel, after which a generalization is performed to make it available for multiple types of metal.
master thesis 2017
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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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Tonnaer, R. (author)
The strict quality requirements for aerospace composite structures give rise to costly quality control procedures. In automated fibre placement (AFP) these procedures rely heavily on manualwork and inspection. This research aims at performing preventative non-destructive evaluation of composite laminate quality based on an online geometric...
master thesis 2016
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Ratan Parkhe, K.K. (author)
The importance of aeroelastic tailoring is increasing continuously as the aircraft wings become more and more flexible. Incorporating aeroelastic considerations in the early part of the design process has a lot of benefits. But these require significant computational resources if accurate predictions are needed. This is more relevant these days...
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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Salden, P.H.W. (author)
Topology optimization is an automated design approach for structural applications that is gaining popularity in industry, including the aerospace sector. Resulting designs can be made suitable for traditional manufacturing techniques, although it is a technique that is particularly useful for non-conventional approaches such as additive...
master thesis 2016
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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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Geutjens, R. (author)
The development of humanity has led to an increase in energy demand. To keep up with this need, scientists and engineers are constantly pushing the limits of technology to develop lighter, stronger and more energy efficient devices. Some recent developments in magnetocaloric materials have made it possible to use the magnetocaloric effect for...
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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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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Usman, M. (author)
In this research effect of temperature on the disbond growth rate due to fatigue load in adhesive bonds is investigated. Concept of release of strain energy has been used. In particular the effect of temperature on the relationship between disbond growth rate and strain energy released per load cycle has been investigated. The general trend...
master thesis 2016
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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
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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
Searched for: department:"Aerospace%5C+Structures%5C+and%5C+Materials"
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