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Logo: ISD/Leibniz Universität Hannover
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Finished Research Projects

New Robust DESign Guideline for Imperfection Sensitive COmposite Launcher Structures (DESICOS)

Bild zum Projekt Neue Bemessungsverfahren für imperfektionssensitive Raketenstrukturen aus Faserverbundwerkstoffen (DESICOS)

Supervisor:

Prof. Dr.-Ing. habil. Raimund Rolfes

Researcher:

Dipl.-Ing. Alexander Meurer

Duration:

2012-2015

Funded by:

European Commission (EU 7th framework)

Brief description:

To ensure the development of modern aerospace vehicles, a safe and at the same time significant weight reduction of structural parts has to be established to achieve a cost-effective design. On the one hand, this can be achieved by using modern lightweight composite carbon fiber materials (CFRP). On the other hand, when it comes to cylindrical shells, the development of innovative and highly efficient design criteria is necessary to overcome the overly-conservativeness of current design procedures. DESICOS aims at accomplishing this goal by striving for a significant reduction of the required wall thickness and thus a reduction of vehicles costs, both from the manufacturing as well as the operational side.

 

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Compressive Failure of Polymer Composites -Fiber Kinking-

Bild zum Projekt Druckversagen von kohlenstofffaserverstärkten Kunststoffen -Faser-Knicken-

Supervisor:

Prof. Dr-Ing. habil. Raimund Rolfes

Researcher:

M.Sc. Majeed Bishara

Duration:

2011-2013

Funded by:

International Research Training Group IRTG 1627

Brief description:

A thorough understanding of fiber kinking is essential for the prediction of the stiffness and strength of the fiber reinforced composites. The initiation and propagation of kink bands are very complex problems, where different phenomena such as local nonlinearities (both material and geometrical) interact and have to be taken into account. In this project, the progressive failure of multidirectional laminates under compressive loading is simulated considering the four failure mechanisms: fiber kinking, splitting, matrix cracking and delamination.

 

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Dynamics in Aircraft Engineering Design and Analysis for Light Optimized Structures (DAEDALOS)

Bild zum Projekt Dynamischer Entwurf und Bemessung von hochoptimierten Leichtbaustrukturen von Flugzeugen (DAEDALOS)

Supervisor:

Prof. Dr.-Ing. habil. Raimund Rolfes

Researcher:

Dr.ir. Eelco Jansen, Dipl.-Ing. Alexander Meurer

Duration:

2010-2014

Funded by:

European Commission (EU 7th framework)

Brief description:

European transport policy and the European aircraft industry demand for safer and greener aircraft transport systems as well as for reduced development and operating costs. The DAEDALOS project contributes to these aims by means of an innovative design approach for aerospace structures considering dynamic effects in the loading process more realistically than at present. The objective of the DAEDALOS project is to develop methods and procedures to determine dynamical loads considering the effects of dynamic buckling and material damping during aircraft service.

 

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More Affordable Aircraft through Extended, Integrated and Mature Numerical Sizing (MAAXIMUS)

Bild zum Projekt Ökonomischerer Entwurf von Flugzeugstrukturen durch erweiterte und fortschrittliche numerische Bemessungsmethoden (MAAXIMUS)

Supervisor:

Prof. Dr.-Ing. habil. Raimund Rolfes

Researcher:

M.Sc. Steffen Czichon, Dipl.-Ing. Benedikt Kriegesmann

Duration:

2008-2015

Funded by:

European Commission (EU 7th framework)

Brief description:

The aim of MAAXIMUS is to demonstrate the fast development and right-first-time validation of a highly optimised composite airframe, through coordinated developments on physical demonstrations of composite technologies and virtual structure development capabilities. The focus of ISD lies in developing high fidelity tools to determine the influence of imperfections on stability behaviour of panels regarding stochastic aspects as well as multi-scale approaches to analyse the effects of manufacturing defects on mechanical properties.

 

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