Computation of residual stresses for a repair weld case

Heikki Keinänen

    Research output: Contribution to journalArticleScientificpeer-review

    5 Citations (Scopus)


    The target of EU FP7 STYLE project (Structural integrity for lifetime management - non-RPV component) was to improve and unify the methods of a structural integrity assessment in the ageing and lifetime management of reactor coolant pressure boundary components. One of the mock-ups in the project was manufactures from two pipes welded together. After completion of the girth weld, a deep weld repair was inserted into the girth weld. As a part of the work, roundrobin finite element computations were performed to determine residual stresses after repair welding and the computational results were compared to the deep hole drilling measurements. In this paper, the details and recomputed results of one of the analyses is presented. A part of the input data was generated with in-house codes. Sequential thermal and mechanical analyses were performed with a small strain and displacement formulation. The comparison of computed and measured temperatures and stresses shows good agreement. The computed hoop stress at the repair mid-length was higher than the axial stress. Both stresses were tensile through the wall thickness. Confidence in the results was also gained as the results were compared to those presented in the literature for a repair welding case.
    Original languageEnglish
    Pages (from-to)507-513
    JournalWelding in the World
    Issue number3
    Publication statusPublished - 2016
    MoE publication typeA1 Journal article-refereed


    • finite element analysis
    • residual stresses
    • repair
    • welding


    Dive into the research topics of 'Computation of residual stresses for a repair weld case'. Together they form a unique fingerprint.

    Cite this