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Measurement of strain evolution in overloaded roller bearings using energy dispersive X-ray diffraction

Research output: Contribution to journalArticle

Original languageEnglish
Article number105893
Number of pages12
JournalTribology International
Volume140
Early online date2 Aug 2019
DOIs
DateAccepted/In press - 2 Aug 2019
DateE-pub ahead of print - 2 Aug 2019
DatePublished (current) - 1 Dec 2019

Abstract

There are several mechanisms contributing towards detrimental damage in wind turbine gearbox bearings, with sudden overload events believed to reduce their expected operational life. The generation of subsurface plasticity, followed by rolling contact fatigue, may lead to the initiation of either surface or subsurface cracking. This study presents a novel technique capable of measuring subsurface strain evolution in a rotating roller bearing, using energy dispersive X-ray diffraction. A pre-overloaded bearing was tested dynamically and consequently failed prematurely, supporting the hypothesis that overloads accelerate bearing failure. Throughout the test, an increase in compressive radial strain was observed, indicative of material softening, generally associated with the unstable stage of rolling contact fatigue, which occurs prior to definitive bearing failure.

    Research areas

  • Bearing overload, Rolling contact fatigue, Stroboscopic strain, Energy dispersive X-ray diffraction

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  • Full-text PDF (final published version)

    Rights statement: This is the final published version of the article (version of record). It first appeared online via Elsevier at https://doi.org/10.1016/j.triboint.2019.105893 . Please refer to any applicable terms of use of the publisher.

    Final published version, 2 MB, PDF document

    Licence: CC BY

  • Full-text PDF (final published version)

    Rights statement: This is the final published version of the article (version of record). It first appeared online via Elsevier at https://www.sciencedirect.com/science/article/pii/S0301679X19304128?via%3Dihub#! Please refer to any applicable terms of use of the publisher.

    Final published version, 2 MB, PDF document

    Licence: CC BY

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