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Dive into the research topics where Alexandra Kühn is active.

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Featured researches published by Alexandra Kühn.


Lightweight design | 2016

Automatisierte Fertigung von Rotorblättern für Windenergieanlagen

Felix Kruse; Alexandra Kühn; Thorsten Mahrholz; Yannis Grohmann; Niels Stoffers

Der Erfolg einer Automatisierungslosung fur die Faserablage wird vor allem daran gemessen, ob es gelingt, die Fertigungskosten des Rotorblatts sowie dessen Fertigungszeit zu senken. Die Hurden hierfur sind hoch. Bei den aktuellen Blattarchitekturen und Bauweisen mussen nicht nur Fasern abgelegt, sondern auch Stutzstoffe in den Bereichen des Blatts mit Sandwichhauten platziert werden. Dieser Beitrag des DLR beschreibt, dass eine erfolgreiche Automatisierung fur die Faserablage nicht nur die Fertigungskosten reduzieren muss, sondern auch die Materialeinzelkosten.


Archive | 2013

Advanced Flame Protection of CFRP Through Nanotechnology

Alexandra Kühn; Michael Sinapius

This chapter refers about the optimization of fire resistance of CFRP. For this optimization the most promising nano scaled additives are used and varied regarding the particle content, size and effect of flame retardancy. One major challenge is to optimize the particle dispersion and to determine the optimal particle concentrations in consideration of the effect of flame retardancy and the resulting material properties. Additionally a fire testing method has to be determined that resolves the potentially small differences in the used variations. Therefore standard fire and mechanical tests are used as well as a simple thermal material method, given with the thermo gravimetric analysis (TGA) including a single differential thermal analysis (SDTA) that also suits for a fast comparison of the materials fire properties. Hereby obtained results are compared and a related behaviour of the fire properties can be shown between standard fire tests and thermal material tests using the TGA-device.


Journal of Materials Science | 2011

Polymer nanocomposites based on epoxy resin and ATH as a new flame retardant for CFRP: preparation and thermal characterisation

Daniela Könnicke; Alexandra Kühn; Thorsten Mahrholz; Michael Sinapius


Journal of Materials Science | 2012

Magnetostrictive properties of epoxy resins modified with Terfenol-D particles for detection of internal stress in CFRP. Part 1: Materials and processes

Marcus Kubicka; Thorsten Mahrholz; Alexandra Kühn; Peter Wierach; Michael Sinapius


Journal of Materials Science | 2013

Magnetostrictive properties of epoxy resins modified with Terfenol-D particles for detection of internal stress in CFRP. Part 2: evaluation of stress detection

Marcus Kubicka; Thorsten Mahrholz; Alexandra Kühn; Peter Wierach; Michael Sinapius


CEAS Aeronautical Journal | 2013

Matrix optimization of CFRP parts concerning fire and impact properties with process acceleration

Alexandra Kühn; Thorsten Mahrholz; Jürgen Mosch


Polymer Testing | 2016

Determination of volumetric shrinkage of thermally cured thermosets using video-imaging

Wibke Exner; Alexandra Kühn; Artur Szewieczek; Mark Opitz; Thorsten Mahrholz; Michael Sinapius; Peter Wierach


Polymer Composites | 2018

Powder binders used for the manufacturing of wind turbine rotor blades. part 1. Characterization of resin-binder interaction and preform properties

Stefan Schmidt; Thorsten Mahrholz; Alexandra Kühn; Peter Wierach


Archive | 2017

Faserverbundstrukturen für Hochtemperaturanwendungen

Alexandra Kühn; Thorsten Mahrholz; Martin Liebisch


Archive | 2016

DEVELOPMENT OF THE DIRECT ROVING PLACEMENT TECHNOLOGY (DRP)

Yannis Grohmann; Niels Stoffers; Alexandra Kühn; Thorsten Mahrholz

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Felix Kruse

German Aerospace Center

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