SAMPE Journal - September/October 2022 - 32

FEATURE
COMPOSITE PRESSURE VESSELS
Towpreg-Based Design and Manufacture of MultiSupply
Filament-Wound Composite Pressure Vessels
Kumar C. Jois, Tim Mölling, Thomas Gries and Johannes Sackmann
Institute for Textile Technology (ITA), RWTH Aachen University
Aachen, Germany
Email: Tim.Molling@ita.rwth-aachen.de
ABSTRACT
Hydrogen-powered vehicles enable an emission-free mobility. One of the main
hindrances to a widespread application of these systems, is the component costs,
e.g., the hydrogen storage. In order to facilitate a broad deployment of hydrogen
vehicles, emerging high-productive manufacturing technologies are preferred. In this
paper, the design and manufacture of composite pressure vessels (CPV) based on preimpregnated
fibers, so-called towpregs, is investigated. For the manufacturing, the novel
multi-supply filament winding (MFW) technology is used. MFW allows the processing
of up to 48 towpregs simultaneously and is especially suited for towpregs. Initially,
the influence of the winding parameters on the mechanical properties are analyzed.
Suitable process parameters are selected for the calculation of the laminate layout
through finite element analysis and as machine input parameters. After consolidation,
the manufactured vessel is subjected to internal pressure to ascertain the failure
pressure and failure mechanism. Samples of the dome and cylindrical part are analyzed
via computer-tomography to determine the void content of the laminate. In summary,
a novel, and an effective manufacturing process for CPV is illustrated with emphasis on
its process parameters for an industrial implementation. Further, a sufficient laminate
layup for the processing of towpregs is developed.
32 | SAMPE JOURNAL | SEPTEMBER OCTOBER 2022
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SAMPE Journal - September/October 2022

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