The strength of steam turbine bolts

Ulla Mäkelä, Pertti Auerkari, Paavo Rautala, Stefan Sandlin, Kim Wallin

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review


    A simple model was developed for predicting steam turbine bolt relaxation during a service cycle. The model appears to agree reasonable well with experimental results from bolted joints, although the strains of bolt threads, nuts and flanges in the joint are assumed insignificant compared to bolt shaft strain.

    The material parameters involved in the model are those generally applied for elastic and viscoplastic deformation, and therefore should reflect material properties as shown by ordinary material testing.

    For testing the model and determining material parameters, relaxation testing will be carried out using steam turbine bolt joint models.
    Original languageEnglish
    Title of host publicationStrength of Metals and Alloys (ICSMA 8)
    Subtitle of host publicationProceedings of the 8th International Conference On The Strength Of Metals and Alloys
    EditorsP.O. Kettunen, T.K. Lepistö, M.E. Lehtonen
    PublisherPergamon Press
    ISBN (Print)978-0-08-034804-9
    Publication statusPublished - 1988
    MoE publication typeA4 Article in a conference publication
    Event8th International Conference on Strength of Metals and Alloys, ICSMA 8 - Tampere, Finland
    Duration: 22 Aug 198826 Aug 1988


    Conference8th International Conference on Strength of Metals and Alloys, ICSMA 8


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