Searched for: department%3A%22Aerospace%255C+Structures%255C+and%255C+Computational%255C+Mechanics%22
(1 - 20 of 20)
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Niessink, M.J. (author)
Key technological challenges within the field of aeronautical engineering drive the design of wings to become increasingly lighter and more flexible. The added flexibility increases the influence of aeroelastic effects, which need to be incorporated in the preliminary design phase. To this end an aeroelastic tailoring tool for composite wing...
master thesis 2016
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Heijmer, M.B.M. (author)
An accurate corner strength modelling method is required at Fokker Aerostructures to design canisters (missile launch tubes) with rounded corners for an internal pressure load case. To this end a combination of experiments and calculation methods has been developed that enable to predict the corner strength more accurately. Internal pressure...
master thesis 2016
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Cabot Talens, E. (author)
This MSc thesis addresses the study of buckling and post-buckling of composite plates with elastic restraints at the edges and under any combination of in-plane loading, aiming to solve the plate response in stiffened panel structures. The implemented solutions are based on thin plate theory for mid-plane symmetric plates. The governing...
master thesis 2016
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Heuijerjans, R. (author)
master thesis 2016
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De Baerdemaeker, J.C.A. (author)
Following the EU-28 targets, in 2050 a reduction in total energy consumption of 70% compared to the 2008 consumption is required driven by weight reduction in the road transportation industry. Because of the high specific strength and stiffness of composite materials, introduction of advanced composites in the vehicle design is observed. However...
master thesis 2016
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Laan, R.P.J. (author)
Engineers are still looking for ways to improve the performance of materials used in aircraft. A major step was going from metal parts to laminates in order to save weight significantly. Those laminates existed of fibres with a constant orientation, and became laminates with changing fibre directions. Variable stiffness laminates (VSL) are used...
master thesis 2016
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Van Hoorn, N. (author)
For failure in composite materials the fracture mechanisms at the microscopic scale, such as matrix cracking, fiber cracking, fiber-matrix debonding or combinations thereof determine the growth of crack at the macroscopic scale. The goal is to develop a simple failure criterion in terms of a bilinear Traction-Separation Law (TSL) for...
master thesis 2016
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Guo, Y. (author)
The conceptual ideas behind isogeometric analysis (IGA) are aimed at unifying computer aided design (CAD) and finite element analysis (FEA). Isogeometric analysis employs the non-uniform rational B-spline functions (NURBS) used for the geometric description of a structure to approximate its physical response in an isoparametric sense. Due to the...
doctoral thesis 2016
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Bernhammer, L.O. (author)
Wind turbines convert kinetic energy of the wind into electrical energy. Unfortunately, this process is everything but constant, as the wind source shows large fluctuations with high and low frequencies. This turbulence, together with the wind shear and yawed inflow, excites the turbine structure, thereby driving the loads and the design of...
doctoral thesis 2015
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Thedens, P. (author)
Membrane structures have a wide field of application in modern engineering due to their low weight-to-area ratio, which is especially exploited in kite design. The internal pressure of ram-air kites has to be well distributed over all cells in order to maintain the aerodynamic shape. By cutting holes in each rib the stagnated air can provide the...
master thesis 2015
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Shroff, S. (author)
The application of composites in aircraft structures has grown significantly in the past decade, and an increase in this growth in application has recently been achieved in fuselage designs for large civil aircraft such as the Boeing B787 and the Airbus A350. In conventional design philosophies, weight savings is the primary objective on a part...
doctoral thesis 2014
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Dillinger, J.K.S. (author)
The application of composite material in load carrying structural components of an aircraft is rapidly gaining momentum. While part of the reason for this can certainly be attributed to an increasing confidence of designers in the new material as a result of growing experience, two other crucial points can be made. One, the continuous...
doctoral thesis 2014
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Khani, A. (author)
Automated fibre placement (AFP) machines are able to place simultaneously several bundles of fibres, called tows, on a surface. Using AFP machines, it is also possible to manufacture composite laminates with fibres placed in curvilinear paths. The fibre orientations and stiffness properties of these laminates are spatially varied and hence they...
doctoral thesis 2013
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Nagelsmit, M.H. (author)
Composites are notorious for their poor impact behaviour. Delaminations seriously decrease the compressive strength of the material after impact. Laminates made from woven fabric show in general more beneficial impact behaviour than laminates with unidirectional layers, but their manufacturing process is harder to automate. The new fibre...
doctoral thesis 2013
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Liang, K. (author)
Thin-walled structures, when properly designed, possess a high strength-to-weight and stiffness-to-weight ratio, and therefore are used as the primary components in some weight critical structural applications, such as aerospace and marine engineering. These structures are prone to be limited in their load carrying capability by buckling, while...
doctoral thesis 2013
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Pahlavan, L. (author)
In order for the increased use of fiber-reinforced composite structures to be financially feasible, employment of reliable and economical systems to detect damage and evaluate structural integrity is necessary. This task has traditionally been performed using off-line non-destructive testing (NDT) techniques. Safety enhancement programs and cost...
doctoral thesis 2012
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Kassapoglou, C. (author)
The increased use of advanced composite materials on primary aircraft structure has brought back to the forefront the question of how such structures perform under repeated loading. In particular, when damage or other stress risers are present, tests have shown that the load to cause failure after a given number of cycles is a decreasing...
doctoral thesis 2012
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Van Campen, J.M.J.F. (author)
Advancements in automated fibre-placement (AFP) technology make it possible to take laminate tailoring further than just stacking sequence optimisation; they enable the designer to vary the fibre orientation angle spatially within each ply. Spatial variation of fibre orientation angles results in a variable stiffness (VS) laminate. The work...
doctoral thesis 2011
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IJsselmuiden, S.T. (author)
Fiber reinforced composite materials have gained widespread acceptance for a multitude of applications in the aerospace, automotive, maritime and wind-energy industries. Automated fiber placement technologies have developed rapidly over the past two decades, driven primarily by a need to reduce manufacturing costs and improve product consistency...
doctoral thesis 2011
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De Breuker, R. (author)
Morphing aircraft can change their shape radically when confronted with a variety of conflicting flight conditions throughout their mission. For instance the F-14 Tomcat fighter aircraft, known from the movie Top Gun, was able to sweep its wings from a straight wing configuration to a highly swept version. Such concepts, which are basically...
doctoral thesis 2011
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