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hal.structure.identifierEmerson-Leroy Somer
hal.structure.identifierLaboratoire des Arts et Métiers ParisTech d'Angers - Procédés Matériaux Durabilité [LAMPA - PMD]
dc.contributor.authorDEHMANI, Helmi
dc.contributor.authorBRUGGER, Charles
dc.contributor.authorPALIN LUC, Thierry
IDREF: 136498752
hal.structure.identifierLaboratoire des Arts et Métiers ParisTech d'Angers - Procédés Matériaux Durabilité [LAMPA - PMD]
dc.contributor.authorMAREAU, Charles
hal.structure.identifierEmerson-Leroy Somer
dc.contributor.authorKOECHLIN, Samuel
dc.date.accessioned2021-05-14T09:40:18Z
dc.date.available2021-05-14T09:40:18Z
dc.date.issued2015-12
dc.identifier.issn1877-7058
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/76554
dc.description.abstractRotors of electric machines are built from stacks of thin steel sheets. The fabrication process of these components usually involves punching operations that generate defects on the steel sheet edges. In this study, high cycle fatigue tests are performed on punched and polished edges specimens to investigate the effect of the punching process on the fatigue behaviour of these thin sheets. Results show a significant decrease of the fatigue strength for punched specimens. SEM observations of fracture surfaces reveal that crack initiation always occurs on a punching defect. Residual stresses on punched edges are analysed using X-Ray diffraction techniques. High tensile residual stresses along the loading direction are found. Some specimens edges were scanned using 3D topography prior to the fatigue tests. This allows for identifying the real geometry of the most critical defect. Murakami criterion was then evaluated in order to take into account the effect of defects. The best trend of the experimental results is given when residual stresses are taken into account. Local elastic stresses for 3 defects geometries have been calculated using FEA. Crossland fatigue criterion has been evaluated to try accounting for the local stress state around defects. Results show that the assessed fatigue strength is overestimated using this criterion.
dc.language.isoen
dc.publisherElsevier
dc.subjecthigh cycle fatigue
dc.subjectcrack initiation
dc.subjectThin sheet
dc.subjectelectrical steel
dc.subjectpunching
dc.subjectdefects
dc.titleCharacterization and simulation of the effect of punching on the high cycle fatigue strength of thin electric steel sheets
dc.typeArticle de revue
dc.subject.halPhysique [physics]
bordeaux.journalProcedia Engineering
bordeaux.page556-561
bordeaux.volume133
bordeaux.hal.laboratoriesInstitut de Mécanique et d’Ingénierie de Bordeaux (I2M) - UMR 5295*
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionBordeaux INP
bordeaux.institutionCNRS
bordeaux.institutionINRAE
bordeaux.institutionArts et Métiers
bordeaux.peerReviewedoui
hal.identifierhal-02333342
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02333342v1
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