Non-threshold acoustic emission analysis of damage evolution in pipe segments of steel S355J2H under bending load
- Four-point bending tests were carried out to analyze the acoustic characteristics of damage development in pipe segments made of steel, grade S355J2H, being 2.5 m long with an outer diameter of 168 mm and 16 mm wall thickness. To induce stable crack growth, the pipe segments were pre-damaged by a 90°circumferential notch in the middle of the pipe length. While the pipe was quasi-statically loaded, microscopic damage and plastic deformation accumulated to form a macroscopic crack that grew through the pipe wall until leakage. For acoustic emission (AE) monitoring, four broadband sensors of type VS 900 M were mounted close to the notch. Continuous AE signal detection was performed by the non-threshold method. Advantages and disadvantages of the non-threshold AE monitoring compared to a commonly employed method analyzing only signals exceeding a predefined threshold are discussed. The results of AE analysis are compared to additional information on the crack growth detected by the directFour-point bending tests were carried out to analyze the acoustic characteristics of damage development in pipe segments made of steel, grade S355J2H, being 2.5 m long with an outer diameter of 168 mm and 16 mm wall thickness. To induce stable crack growth, the pipe segments were pre-damaged by a 90°circumferential notch in the middle of the pipe length. While the pipe was quasi-statically loaded, microscopic damage and plastic deformation accumulated to form a macroscopic crack that grew through the pipe wall until leakage. For acoustic emission (AE) monitoring, four broadband sensors of type VS 900 M were mounted close to the notch. Continuous AE signal detection was performed by the non-threshold method. Advantages and disadvantages of the non-threshold AE monitoring compared to a commonly employed method analyzing only signals exceeding a predefined threshold are discussed. The results of AE analysis are compared to additional information on the crack growth detected by the direct current potential drop (DCPD) technique. These studies were carried out in the course of the interdisciplinary research project AGIFAMOR, Ageing infrastructures - distributed acoustic monitoring of pipes at BAM.…
Autor*innen: | Franziska BaenschORCiD, Wolfram BaerORCiD, Peter Wossidlo, Abdel Karim Habib |
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Dokumenttyp: | Beitrag zu einem Tagungsband |
Veröffentlichungsform: | Graue Literatur |
Sprache: | Deutsch |
Titel des übergeordneten Werkes (Deutsch): | 33rd European Conference on Acoustic Emission Testing |
Jahr der Erstveröffentlichung: | 2018 |
Organisationseinheit der BAM: | 2 Prozess- und Anlagensicherheit |
2 Prozess- und Anlagensicherheit / 2.1 Sicherheit von Energieträgern | |
8 Zerstörungsfreie Prüfung | |
8 Zerstörungsfreie Prüfung / 8.1 Sensorik, mess- und prüftechnische Verfahren | |
9 Komponentensicherheit | |
9 Komponentensicherheit / 9.6 Additive Fertigung metallischer Komponenten | |
Herausgeber (Institution): | European Working Group on Acoustic Emission |
Verlagsort: | France, Senlis |
Erste Seite: | 340 |
Letzte Seite: | 347 |
DDC-Klassifikation: | Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurbau |
Freie Schlagwörter: | Crack growth; Crack initiation; Four-point bending test; Steel pipe Acoustic emissions (AE) |
Themenfelder/Aktivitätsfelder der BAM: | Infrastruktur |
Veranstaltung: | 33rd European Conference on Acoustic Emission Testing |
Veranstaltungsort: | Senlis, France |
Beginndatum der Veranstaltung: | 12.09.2018 |
Enddatum der Veranstaltung: | 14.09.2018 |
Verfügbarkeit des Dokuments: | Datei im Netzwerk der BAM verfügbar ("Closed Access") |
Datum der Freischaltung: | 17.09.2018 |
Referierte Publikation: | Nein |