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 hal.structure.identifier
DEHMANI, Helmi
164351 Institut de Mécanique et d'Ingénierie de Bordeaux [I2M]
dc.contributor.author
 hal.structure.identifier
BRUGGER, Charles
164351 Institut de Mécanique et d'Ingénierie de Bordeaux [I2M]
dc.contributor.author
 hal.structure.identifier
PALIN-LUC, Thierry
164351 Institut de Mécanique et d'Ingénierie de Bordeaux [I2M]
dc.contributor.author
 hal.structure.identifier
MAREAU, Charles
206863 Laboratoire des Arts et Métiers ParisTech d'Angers - Procédés Matériaux Durabilité [LAMPA - PMD]
dc.contributor.author
 hal.structure.identifier
KOECHLIN, Samuel
467842 Emerson-Leroy Somer
dc.date.accessioned2016
dc.date.available2017
dc.date.issued2016
dc.date.submitted2016
dc.identifier.urihttp://hdl.handle.net/10985/11225
dc.description.abstractSome parts of electrical machines are built from stacks of thin steel sheets, for which the coarse grain microstructure allows for minimizing magnetic losses. The fabrication process of these parts usually involves punching operations that generate important defects on the edges. Since these alterations may result in a degradation of the fatigue strength, this study aims at elaborating on a fatigue design strategy for such punched parts. To reach this objective, high cycle fatigue tests are performed on different specimens with either punched or polished edges. The results show a significant decrease of the fatigue strength for punched specimens. Scanning electron microscope observations of specimen facture surfaces reveal that defects on punched edges are at the origin of the fatigue cracks. The influence of temperature is also investigated. Fatigue tests are performed at ambient temperature (20°C) and at 180°C. According to the experimental results, no significant influence on the median fatigue strength is observed. Since crack initiation always occur on the edges, additional investigations are performed to characterize how edges are altered by punching operations. Residual stresses are determined on punched edges using x-ray diffraction techniques. As a consequence of punching, important tensile residual stresses exist along the loading direction. In association with the stress concentration caused by geometrical defects, residual stresses promote crack initiation and fast crack propagation. For a better understanding of crack initiation, edge geometries are scanned with a 3D optical profilometer, allowing us to identify the critical defect. It is found that the typical defect size is comparable to the grain size.
dc.language.isoen
dc.publisherASTM
dc.rightsPost-print
dc.subjectFe–Si steel sheet
dc.subjectHigh Cycle Fatigue
dc.subjectPunching effect
dc.subjectTemperature effect
dc.subjectresidual stress
dc.subjectdefect
dc.titleHigh Cycle Fatigue Strength of Punched Thin Fe-Si Steel Sheets
ensam.embargo.terms2017-01-01
dc.identifier.doi10.1520/MPC20150063
dc.typdocArticles dans des revues avec comité de lecture
dc.localisationCentre de Angers
dc.localisationCentre de Bordeaux-Talence
dc.subject.halSciences de l'ingénieur: Mécanique
dc.subject.halSciences de l'ingénieur: Mécanique: Génie mécanique
dc.subject.halSciences de l'ingénieur: Mécanique: Mécanique des matériaux
dc.subject.halSciences de l'ingénieur: Mécanique: Mécanique des structures
ensam.audienceInternationale
ensam.page1-15
ensam.journalMaterials Performance and Characterization
ensam.volume5
ensam.issue3
ensam.peerReviewingOui
hal.identifierhal-01375905
hal.version1


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