Dec 13, 2024
Two new research articles published
We are pleased to announce the publication of the articles "Multi Scale Systematization of Damage and Failure Modes of High-Pressure Hydrogen Composite Vessels in Aviation. Part 1: Methodology" and "Part 2: Analysis" in the International Journal of Hydrogen (Impact Factor 8.1, Cite Score 13.5 ).
The paper by RTG doctoral student David Schlegel (project F7), former associate member Max Vater, Dr. Sebastian Spitzer (Head of Lightweight Structures from the TUD Institute of Lightweight Engineering and Polymer Technology), Prof. Maik Gude, Chair of Lightweight System Engineering and Multi-Material Design, and Prof. Antonio Hurtado, Chair of Hydrogen and Nuclear Energy and spokesperson of the Boysen-TUD-Research Training Group, systematizes loads and failure modes of high-pressure hydrogen vessels in the aviation context.
The development of high-pressure hydrogen spokes (CGH2) in fiber-plastic composite construction for aviation is characterized by uncertainties in design, material and manufacturing as well as the consideration of complex failure modes such as delamination and fiber breakage, which requires high safety margins. In order to reduce these margins and maximize gravimetric storage density, Part 1 develops a methodology for systematizing loads and failure modes and their propagation over different length scales, on the basis of which a well-founded reliability analysis is possible. Existing approaches are analyzed, requirements are derived and a new development logic is defined.
Schematic representation of the load and failure propagation along the length scales
In Part 2, this methodology is applied as an example to a B2 aircraft equipped with a CGH2 storage system in an external external load container. Load cases, stresses and failure modes are analyzed from the aircraft level to the material level. The application shows how multiscale effects influence reliability and enables the identification of engineering measures to improve the reliability-to-mass ratio.
The articles are available as open access at the following links:
Part 1: https://doi.org/10.1016/j.ijhydene.2024.11.115
Part 2: https://doi.org/10.1016/j.ijhydene.2024.11.457