07 Fakultät Konstruktions-, Produktions- und Fahrzeugtechnik

Permanent URI for this collectionhttps://elib.uni-stuttgart.de/handle/11682/8

Browse

Filters

2012 - 201922020 - 20221

Settings

Institute: search.filters.UBSInstitut.Institut für FlugzeugbauSubject: search.filters.subject.620

Search Results

Now showing 1 - 3 of 3
  • Thumbnail Image
    ItemOpen Access
    Hybride Intelligente Konstruktionselemente (HIKE) - Abschlusskolloquium der DFG-Forschergruppe 981 : Stuttgart, 10.11.2015
    (Stuttgart : Institut für Konstruktionstechnik und Technisches Design, 2016) Binz, Hansgeorg
    Die Forschergruppe hat die Ergebnisse der zweiten Förderperiode anlässlich eines Abschlusskolloquiums am 10.11.2015 in der Universität Stuttgart vor Gästen aus Industrie und Wissenschaft präsentiert. Dabei wurden die Ergebnisse der Teilprojekte in Vorträgen präsentiert, Prototypen in Form von kleineren Funktionsmustern vorgestellt sowie das Zusammenwirken der HIKE im Gesamtdemonstrator „Schalentragwerk“ vorgeführt. Der vorliegende Sammelband enthält jeweils kurze Zusammenfassungen der Teilprojekte, in denen die Ziele, das Vorgehen und die wesentlichen Ergebnisse vorgestellt werden, sowie die Präsentationsfolien der einzelnen Teilprojektvorträge samt einer Einleitung und Zusammenfassung des Sprechers der Forschergruppe.
  • Thumbnail Image
    ItemOpen Access
    Mechanical, thermal and electrical properties of epoxy nanocomposites with amine-functionalized reduced graphene oxide via plasma treatment
    (2022) Ackermann, Annika C.; Fischer, Michael; Wick, Alexander; Carosella, Stefan; Fox, Bronwyn L.; Middendorf, Peter
    A suitable functionalization of graphene and its derivatives can further enhance the material properties of nanocomposites. In contrast to chemical functionalization methods that have been extensively researched, functionalization by plasma treatment is relatively unexplored. In this work, we compare the mechanical, thermal and electrical characteristics of an epoxy matrix incorporating loadings from 0.00 to 1.50 wt% of non-functionalized (rGO) and amine-functionalized reduced graphene oxide (frGO) for which the functionalization is realized by plasma processing. No significant difference between the rGO- and frGO-including nanocomposites was observed with respect to the stiffness, strength, specific heat capacity, coefficient of thermal expansion and electrical conductivity. Yet, the composites with 1.50 wt% frGO (rGO) exhibited a thermal conductivity that was 27% (20%) higher than the neat polymer due to the enhanced interface, which enabled a better transfer of heat. In addition, a considerable increase in the specific heat capacity and thermal conductivity was established with rising temperatures. This information will facilitate the choice of materials depending on the loading and functionalization of graphene materials for composite applications with an epoxy matrix.
  • Thumbnail Image
    ItemOpen Access
    Reduced nonlinear model of a spar-mounted floating wind turbine
    (2012) Sandner, Frank; Schlipf, David; Matha, Denis; Seifried, Robert; Cheng, Po Wen
    Floating offshore wind turbines (FOWTs) are complex dynamic systems requiring a thorough design for optimal operating performance and stability. Advanced control strategies, like model predictive control, are part of the integrated development of new concepts. This paper presents a simplified and computationally efficient model of the spar-mounted OC3-Hywind FOWT. Applications are, e.g., the real-time integration within the controller or an assessment during conceptual design, possibly within an optimization algorithm. Symbolic equations of motion of a multibody system are available as a set of ordinary differential equations. Aerodynamic forces are computed based on a rotor effective wind speed at hub height using data tables for thrust and torque coefficients. Hydrodynamic impacts on the floating body are modeled in a way that only the wave height serves as the disturbance signal. This estimation is based on potential flow theory and Morison’s formula for slender cylinders. The reduced model code is fully compiled and has a real-time factor of approximately 100. Various simulations of common load cases with a comparison to the certified FAST code have shown to be promising.