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

—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...

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Bibliographic Details
Published inInorganic materials : applied research Vol. 13; no. 6; pp. 1683 - 1702
Main Authors Ilyin, A. V., Sadkin, K. E., Zabavichev, N. S.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 2022
Springer Nature B.V
Subjects
Chemistry
Chemistry and Materials Science
Crack propagation
Estimation
Fatigue failure
Fatigue strength
Fatigue tests
High strength steels
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Interpolation
Materials Science
Mathematical models
Shells (structural forms)
Structural and Technological Strength and Performance of Materials
Welded joints
Welded structures
fatigue strength
estimation
high-strength steels
welded shell structures
low-cycle load
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Summary:—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.
ISSN:2075-1133
2075-115X
DOI:10.1134/S2075113322060107