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Internal fatigue crack monitoring during ultrasonic fatigue test using temperature measurements and tomography

Article dans une revue avec comité de lecture
Author
ccRANC, Nicolas
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
ccMESSAGER, Alexandre
1002421 Institut de Mécanique et d'Ingénierie [I2M]
JUNET, A.
31551 Matériaux, ingénierie et science [Villeurbanne] [MATEIS]
ccPALIN-LUC, Thierry
1002421 Institut de Mécanique et d'Ingénierie [I2M]
BUFFIÈRE, J.Y.
31551 Matériaux, ingénierie et science [Villeurbanne] [MATEIS]
ccSAINTIER, Nicolas
1002421 Institut de Mécanique et d'Ingénierie [I2M]
ELMAY, Wafa
1002421 Institut de Mécanique et d'Ingénierie [I2M]
MANCINI, L.
251505 Elettra Sincrotrone Trieste
KING, A.
1744 Synchrotron SOLEIL [SSOLEIL]
NADOT, Yves
118112 Institut Pprime [PPRIME]

URI
http://hdl.handle.net/10985/22660
DOI
10.1016/j.mechmat.2022.104471
Date
2022-09
Journal
Mechanics of materials

Abstract

Very high cycle fatigue fracture is often associated with internal crack propagation and one major problem to study the initiation and the propagation of this internal crack is to detect its initiation and quantify its propagation rate. The objective of the present work is to develop an experimental methodology to follow the initiation and propagation of the internal crack. The experimental technique presented here is based on temperature field measurement on the specimen surface during an ultrasonic fatigue test using infrared thermography. Indeed, plasticity in the reverse cyclic plastic zone near the crack front generates heat sources due to the dissipation of plastic energy rate and thus an increase of the temperature which propagates through the specimen thanks to heat conduction. By considering the heat source located in the reverse cyclic plastic zone and the geometry of the crack obtained by tomographic observations, finite element simulation of the heat transfer problem enables us to establish a relationship between the internal crack growth and the temperature field evolution on the specimen surface. The results obtained for a cast aluminum alloy are presented and analyzed.

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  • Institut de Mécanique et d’Ingénierie de Bordeaux (I2M)
  • Laboratoire Procédés et Ingénierie en Mécanique et Matériaux (PIMM)

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