Comparison of Different Material Systems for Filament Winding Based on the Split-Disk Experiment and Setup of a Digital Twin

Wound components have gained relevance in recent years, especially due to hydrogen pressure vessels. However, the burst pressure test of the vessel structures is associated with a high time and monetary expenditure, which is why a simplified split-disk test is often applied. In the split-disk test, ring fragments are cut from a test pipe and are loaded in tension, which induces a membrane-like stress state in the laminate. The present study addresses the different mechanical material behavior during split-disk testing of a wet-wound material compared to a commercial Towpreg and the \({\text {TPreg}}^{\circledR }\) material developed at the Institute of Aircraft Design. All three materials have the same layer orientation as well as similar process parameters. In addition to a mechanical investigation of the samples, optical measurement techniques are used to evaluate the quality of the material in terms of porosity and resulting resin areas. Furthermore, a finite element model is used and thus a digital twin of the experimental setup is created to test suitable numerical methods for the different material systems. This is done in order to be able to optimally design a real tank structure with a reduced experimental effort.