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Multifunctional load carrying lightweight structures for space design

 
: Schubert, M.; Perfetto, Sara; Dafnis, A.; Mayer, Dirk; Atzrodt, Heiko; Schröder, K.-U.

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Deutsche Gesellschaft für Luft- und Raumfahrt e.V. -DGLR-, Bonn:
66. Deutscher Luft- und Raumfahrtkongress 2017. Online resource : Luft- und Raumfahrt - im Dienst der Gesellschaft, 5. - 7. September 2017, München
Bonn: DGLR, 2017
http://www.dlrk2017.dglr.de/publikationen/publikationen_nach_titel/index.html
Paper 450131, 11 pp.
Deutscher Luft- und Raumfahrtkongress <66, 2017, München>
English
Conference Paper, Electronic Publication
Fraunhofer LBF ()

Abstract
In the framework of the project multiSat a multifunctional composite structure for satellite applications is investigated. Passive and active functions are integrated into the primary structure. The passive ones are heat transfer, radiation shielding and impact protection, whereas active functions are vibration reduction and transmission of data and electric energy. Sandwich panels and tubes are examined as representative elements of a lightweight satellite structure. Composite materials such as CFRP offer high lightweight potential and due to their multi-layer character they are predestined for application in a multifunctional satellite structure. Each layer within the composite can be defined and designed in a way to provide one or several specific functionalities. In the course of a conceptual analysis and feasibility study, a concept for multifunctional composite structure has been developed. The heat transfer within the structure is improved by using structural materials with high thermal conductivities. Radiation shielding is achieved by selection of materials with high radiation absorption capability and radiation resistance. The protection performance of sandwich panels against impact of micrometeoroids and space debris can is increased significantly by integrating materials between the face sheets, which effectively break up particles and absorb strain energy. For data and energy transfer the integration of optical fibers and flat electric cables is investigated, where aspiezoelectric systems embedded in the composite material are considered for vibration control. In order to verify the integration of the passive and active functions simulation models of a composite sandwich panel and a composite tube are implemented. For vibration control finite element models of a sandwich and tube are computed to compare the performance of different configurations. To test different controls and electric circuits for shunt damping the dynamic behavior of the composite structures is simulated in Matlab via model order reduction.

: http://publica.fraunhofer.de/documents/N-487139.html