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On the Fatigue Strength Calculation of Welded Shell Structures Made of High-Strength Steels under Low-Cycle Loading: Part 2. Development of the Calculation Procedure

  • STRUCTURAL AND TECHNOLOGICAL STRENGTH AND PERFORMANCE OF MATERIALS
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Inorganic Materials: Applied Research Aims and scope

Abstract—The first part of this work [1] substantiates a procedure for estimating the number of cycles before the appearance of a technically detectable fatigue crack in the stress concentrators of weld joints, which are typical places of crack occurrence in the absence of major technological defects. This procedure is based on a physical model of the initial stage of fatigue failure, summarized data on the resistance of high-strength steels and their weld joints to fatigue failure, and finite element calculations. The procedure reduces itself to the use of interpolation formulas summarizing the numerical simulation data. The second part of this study presents information necessary for practical estimation of the fatigue strength in the low-cycle load region, including the choice of reserve coefficients in calculating the life of welded structures. The evaluated data are compared with those obtained in the fatigue tests of large-thickness joints welded in a multi-pass manner.

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Authors and Affiliations

  1. National Research Center Kurchatov Institute—Central Research Institute of Structural Materials Prometey, 191015, St. Petersburg, Russia

    A. V. Ilyin, K. E. Sadkin & N. S. Zabavichev

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  1. A. V. Ilyin
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  2. K. E. Sadkin
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  3. N. S. Zabavichev
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Correspondence to A. V. Ilyin.

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Translated by K. Utegenov

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Ilyin, A.V., Sadkin, K.E. & Zabavichev, N.S. On the Fatigue Strength Calculation of Welded Shell Structures Made of High-Strength Steels under Low-Cycle Loading: Part 2. Development of the Calculation Procedure. Inorg. Mater. Appl. Res. 13, 1683–1702 (2022). https://doi.org/10.1134/S2075113322060107

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