Ein Sensorkonzept zur In-situ-Rissüberwachung in plattenartigen Strukturen
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Dennis Bäcker
, Christoph Häusler and Meinhard Kuna
Kurzfassung
Es wird eine neuartige Methode zur Rissüberwachung in Bauteilen aus dünnwandigen plattenartigen Strukturen vorgestellt. Dazu wird ein Sensorfeld aus piezoelektrischer Polyvinylidenfluorid-Folie (PVDF-Folie) auf die Oberfläche des rissbehafteten Bauteils appliziert. Infolge der Verformungen in der Rissumgebung entstehen elektrische Signale an den PVDF-Elektroden. Ausgehend von den gemessenen Signalen werden infolge der Lösung einer inversen Aufgabe die charakteristischen Risskenngrößen berechnet, d. h. die Spannungsintensitätsfaktoren des Risses und dessen Lage. Dieses Sensorkonzept wurde in [1–4] bereits für Scheibenprobleme erfolgreich entwickelt. In dieser Arbeit erfolgt die Erweiterung des Sensorkonzeptes auf Plattenprobleme, wobei speziell die Kirchhoff'sche Plattentheorie gewählt wurde. Die Messmethode wird am Beispiel eines Risses der Länge 2a in einer unendlichen Platte unter allseitiger Biegung erprobt.
Abstract
In the present contribution a new method for monitoring cracks in structure made of thin plate-like structures is presented. The piezoelectric polymer film (PVDF-film) is attached to surface of the structure. Due to strains in around of the crack tip electrical voltages can be measured. The stress intensity factors and the crack tip position are calculated from measured signals by solving the non-linear inverse problem. This sensor concept described previously [1–4] been successfully developed for tensile and shear loaded plate problems. In this work is the extension of the sensor concept on plate problems, particularly concerning the Kirchhoff plate theory. In the following a concept will be tested and verified at the example of a crack of length 2a in an infinite plate under all sides bend.
Literatur
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© 2013, Carl Hanser Verlag, München
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Articles in the same Issue
- Inhalt/Contents
- Inhalt
- Fachbeiträge/Technical Contributions
- Effects of Copper (Cu), Indium (In), Tin (Sn), Antimony (Sb) and Zinc (Zn) in Sterling Silver Alloys on Mechanical Properties Improvement
- Improvement of Surface Properties of Nickel-Based Superalloys Grade Haynes 214 by Pack Aluminizing
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- Failure Analysis of a Hardened Steel Clamping Head
- Improved Stress Shielding on a Cementless Tibia Tray using Functionally Graded Material
- Influence of Plasma Carbonitriding and Nitriding on Phase Composition and Mechanical Properties of a X 12 CrNi 18 10 Ti Stainless Steel Surface
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- Microstructural Effects on Fatigue Behaviour of a Forged Medium Carbon Microalloyed Steel
- Effect of Ti Addition on the Microstructure and Properties of a High Speed Steel Roll
- The Effect of Nanocomposite Coating with Different Concentrations on Fatigue Life of Carbon Steel AISI 1045
- Microstructural Investigations of Electron Beam Welded Joints of Continuous Saw Blades
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