5 Werkstofftechnik
Filtern
Erscheinungsjahr
- 2018 (1)
Dokumenttyp
Sprache
- Englisch (1)
Referierte Publikation
- nein (1)
Schlagworte
- Rotor blade (1)
- Wind turbine (1)
- X-ray laminography (1)
Organisationseinheit der BAM
- 5 Werkstofftechnik (1) (entfernen)
3D structural investigations are described by X-ray laminography studies of sandwich shell segments, made of a PVC foam core, covered by non-crimp fabric glass fibre composite lay-ups processed by vacuum assisted resin infusion of epoxy. The specific scope of this study is to image transversal flaws within the foam core (joints) and of single ply overlaps. Test flaws were purposely implemented in order to simulate typical failure under cyclic load. In a dedicated test rig for shell structures, the flaw evolution/propagation is monitored by thermography and optical 3D inspection of deformation. Due to the unfavourable preconditions for classical computed tomography as of large aspect ratio, the samples were investigated by coplanar translational laminography. Its limited range of observation angles of ± 45°, results in anisotropic artefacts about the normal to the sample surface, but the typical flaws are well visualized in the as-prepared state, in a state of early damage, and in the repaired state.