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PolyCMUTs for ultrasonic nondestructive testing of carbon fiber reinforced plastic: a feasibility study

Welsch, Jonas (2019) PolyCMUTs for ultrasonic nondestructive testing of carbon fiber reinforced plastic: a feasibility study. DLR-Interner Bericht. DLR-IB-BT-AU-2021-13. Masterarbeit. Universität Stuttgart. 67 S.

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Kurzfassung

The following thesis describes the research conducted in between May and October of 2019 on the topic of PolyCMUTs and their usability for nondestructive evaluation of carbon fiber reinforced plastics. The first step was to calculate the acoustic and mechanical material properties of a provided CFRP test plate and the test of those values with a commercially available CMUT probe. The next part is the explanation of the manufacturing process of new prototypes and the many difficulties that occurred during this process. After several trials a working air coupled ultrasonic transducer was fabricated and then thoroughly characterized. The characterization showed some unexpected behaviour which was then investigated and contributed to a so-called Helmholtz resonance. The resonance phenomena was further explained and the possible benefits in PolyCMUT fabrication were evaluated. The last step was to evaluate these phenomena for further improvement to the technology. The result is that PolyCMUTs can indeed be used for NDE but they need further research and development. A commercial usage is not yet possible.

elib-URL des Eintrags:https://elib.dlr.de/140527/
Dokumentart:Berichtsreihe (DLR-Interner Bericht, Masterarbeit)
Titel:PolyCMUTs for ultrasonic nondestructive testing of carbon fiber reinforced plastic: a feasibility study
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Welsch, JonasNICHT SPEZIFIZIERTNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:17 Dezember 2019
Referierte Publikation:Ja
Open Access:Ja
Seitenanzahl:67
Status:veröffentlicht
Stichwörter:ultrasonic transducers, polymer-based capacitive micromachined ultrasonic transducers, air-coupling, non-destructive inspection, prototype manufacture, Helmholtz resonance
Institution:Universität Stuttgart
Abteilung:Institut für Flugzeugbau
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Flugzeuge
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Aircraft Research
DLR - Teilgebiet (Projekt, Vorhaben):L - Strukturen und Werkstoffe (alt)
Standort: Augsburg
Institute & Einrichtungen:Institut für Bauweisen und Strukturtechnologie > Automation und Produktionstechnologie
Hinterlegt von: Huber, Armin
Hinterlegt am:20 Jan 2021 09:44
Letzte Änderung:07 Aug 2023 17:53

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