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Citations since 2016
8 Research Items
The compaction behaviour of technical textiles such as non-crimp fabrics (NCF) is of much interest to build high quality parts in liquid composite moulding processes (LCM). In this paper, the compaction response of a glass fibre NCF was investigated in two different ways: (1) characterisation tests via a universal testing machine and (2) height mea...
The flow of air over a cylinder at sufficiently high Reynolds number ( Re ) leads to the formation of vortices. The vortices formed undergoes the process of shedding, exerting lift and drag forces onto the cylinder causing the cylinder to oscillate. These oscillations are termed as Vortex Induced Vibrations (VIV). VIV’s can induce very high fatigue...
The presentation deals with a finite element simulation approach to characterise the draping behaviour of 0/90° technical textiles. To meet the ever increasing demand for components with high strength and stiffness to weight ratio, composite materials are being used extensively (Himmel & Heß 2011). Although composite materials are generally manufac...
Technical textiles have the ability to deform under load by shearing, which distinguishes them from thin sheet materials such as paper. This particular property helps them to deform and take the shape of the complex part that they were intended to create. Draping, flexibility and handling of technical textiles are greatly affected by their shearing...
Technical textiles have the ability to deform under load by shearing, which distinguishes them from thin sheet materials such as paper. This particular property helps the technical textile to deform and take the shape of the complex part that it was intended to create. Draping, flexibility and handling of the technical textile are greatly affected...
Cantilever tests based on Peirce’s cantilever testing procedure and three-point bending test were carried out on two different types of rovings (2400 tex and 68 tex) to determine their modulus of elasticity in bending (EB). The results from these experiments are compared with each other. The experiments were then simulated numerically based on fini...
Cantilever tests based on Peirce's cantilever testing procedure and three-point bending test were carried out on two different types of rovings (2400 tex and 68 tex) to determine their modulus of elasticity in bending (EB). The results from these experiments are compared with each other. The experiments were then simulated numerically based on fini...
The document introduces the process of synthesising an SN curve for the material EN-GJS-400-18LT and is a part of the master thesis document, “Fatigue Analysis of a 7.5 MW Wind Turbine Rotor” carried out by Likith Krishnappa under the supervision of Dipl-Ing Matthias Stammler at Fraunhofer IWES, Hannover, Germany
This report presents the numerical investigations of cavitating flow over a 2D symmetrical hydrofoil. Turbulent cavitating flow over a hydrofoil is simulated using a transport equation based model with consideration of the influence of non condensable gases. The results presented in this report focuses on Cavitation inception, shape and behaviour o...
The aim of the project is to avoid possible errors in the manufacturing process of CFRP components with the help of integrated process simulation and reduce process fluctuations. The illustration of the whole Process Chain (i.e. Production and Structural-Mechanical Simulation) helps us to determine the influence of production-related imperfections on the mechanical behaviour of the finished component and to determine the fault tolerances in production. This results in the detection of possible errors early in the process so that, the necessary repair effort can be reduced or even avoided.
We aim at improving our understanding of wind turbine vibrations at different stages of a turbine's life cycle. Utilizing IoT motion sensors, we will measure the structural dynamics of a large fleet of wind turbines. Utilizing the awesome power of OpenFOAM we will conduct FSI CFD simulations based on the conditions recorded at the site of the sensorized wind turbines, hopefully revealing hidden dynamics and connections between the wind field and the structural responses of the turbines.