Concept Study on Optimized Auxiliary Material Designs and Application Techniques for Vacuum Bagging of Full-Scale CFRP Rocket Boosters
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Rising production rates in CFRP aerospace manufacturing cause a growing need for effectivity,
reproducibility and enhanced quality standards. State of the art vacuum bagging for vacuum infusion
technologies still involves a high amount of manual process steps. More efficient production
technologies could increase the economic attractiveness of vacuum infusion processes for large
aerospace structures.
In the context of a research project, the German Aerospace Center (DLR), Augsburg and
MT Aerospace GmbH, Augsburg develop design methods and application concepts for vacuum
bagging on a full-scale CFRP rocket booster case. With a diameter of 3.4 m manual application of
auxiliary materials is challenging in terms of deposition accuracy, reproducibility and reachability.
Facing these challenges, a design method has been developed to generate near net-shape auxiliary
materials with reduced wrinkling. As joining technology for auxiliary material packages, continuous
ultrasonic welding has been selected and validated based on the suitability for vacuum infusion and
out-of-autoclave curing. Manual application tests were conducted on a full-scale booster case
demonstrator. The results show, that a developable shape design of the packages for the doubly curved
dome sections allows best results with regards to wrinkle minimization and the complexity of the
handling procedure.
[1] Roland Glück,et al. Automated Preforming of a solid rocket motor case in full-scale dimensions using dry carbon fiber products , 2016 .
[2] L. Mishnaevsky,et al. Materials for Wind Turbine Blades: An Overview , 2017, Materials.
[3] Clemens Schmidt-Eisenlohr,et al. AUTOMATED HANDLING OF AUXILIARY MATERIALS FOR VACUUM BAGGING IN CFRP FUSELAGE PRODUCTION , 2016 .
[4] Tobias Gerngross,et al. Automated manufacturing of large, three-dimensional CFRP parts from dry textiles , 2016 .