Analytische Chemie
Filtern
Dokumenttyp
- Vortrag (2)
Sprache
- Englisch (2)
Referierte Publikation
- nein (2)
Schlagworte
- Matrix array (2) (entfernen)
Organisationseinheit der BAM
Eingeladener Vortrag
- nein (2)
Components made of fibre-reinforced plastic are a prominently used material in modern safety-relevant structures. Periodic in-service non-destructive inspection of these structures is necesary. The EMRP-funded project VITCEA aims on the evaluation of the performance of various non-destructive testing methods on the inspection of fibre-reinforced plastics.
The physical layout of fibre layers leads to complex structures of fibre-reinforced plastic parts. Furthermore different material properties of the fibre and the resin cause anisotropic behaviour of the material.This poses a challenge for ultrasonic NDT by causing a complex acoustical response.
The acoustical behaviour of fibre-reinforced plate materials has been simulated. Specimens with artificial flaws for the evaluation of the detection thresholds have been designed and manufactured.
Mechanized ultrasonic testing methods using phased-array sensors, air-coupled transducers, immersion tank testing and contact technique have been evaluated on the specimen.
In this talk results of different ultrasonic testing methods will be compared and discussed.
The application of phased arrays in either linear or matrix arrangement in combination with signal processing opens the door for the mechanized inspection of different thin wall materials itself as well as their joining methods.
Modern lightweight components are typically manufactured by a composition of different types of e.g. steels, metals, fiber reinforced plastics and glass. Dependent on the material combinations e.g. welding, brazing, bonding, cladding or coating may be applied during the manufacturing process to join different semi-finished products to form the component.
The resulting complex material composition and different damage mechanisms pose new challenges to non-destructive testing with ultrasound due to the different material properties and the overall arrangement of the materials employed.
The sound field variation capabilities of array probes may be helpful to overcome some of these challenges if adapted to the specific inspection task.
Examples for the non-destructive mechanized phased array inspection of different types of materials and joining methods will be presented.