Abstract
In the project multiSat multifunctional composite structures for satellite application have been developed. Functions such as protection against space debris, radiation shielding and passive thermal control have been integrated into the load-bearing composite spacecraft structure by use of suitable materials and components. Sandwich panels have been studied as representative structural parts of a conventional satellite structure. Measures for increased space debris protection include the substitution of the conventional honeycomb core by 3D-printed aluminum cellular structures and the reinforcement of the sandwich panel by integration of high performance fabrics which effectively break up and catch impacting debris particles. This paper describes the development and design of multifunctional sandwich concepts with increased impact protection capability and presents the experimental results of hypervelocity impact testing with different types of CFRP sandwich panels.
Highlights
During development and production of conventional satellites usually structural, functional and protective functions are considered separately
A satisfactory consistency of the results with regards to the impact event and the type and size of damage caused in the impacted target was observed, which provides important data and knowledge as empirical base for subsequent and more extensive hypervelocity test campaigns in the future
The section cut at the location of impact reveals concentrated but severs damage of the honeycomb core which is indicative of the channelling effect caused by the honeycomb cell walls
Summary
During development and production of conventional satellites usually structural, functional and protective functions are considered separately. The concept of a multifunctional structure allows for the reduction of the overall satellite mass and installation space required for subsystems It opens up new opportunities for highly integrative and standardized production processes and aims at lowering total costs and time for manufacturing, qualification and launch of a satellite. Innovative manufacturing technologies such as additive manufacturing (AM) are increasingly playing an important role in the development of space structures. In the following the development, analysis and testing of sandwich concepts with integrated space debris protection is presented
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