On the Fatigue Strength Calculation of Welded Shell Structures Made of High-Strength Steels under Low-Cycle Loading: Part 1. Estimation at the Initial Stage of Fatigue Failure

• Published in: Inorganic materials : applied research Vol. 13; no. 6; pp. 1666 - 1682
• Main Authors: Ilyin, A. V., Sadkin, K. E., Zabavichev, N. S.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.12.2022; Springer Nature B.V
• Subjects: Chemistry; Chemistry and Materials Science; Crack propagation; External pressure; Fatigue failure; Fatigue strength; High strength steels; Industrial Chemistry/Chemical Engineering; Inorganic Chemistry; Internal pressure; Materials Science; Mathematical analysis; Physical simulation; Residual stress; Shells (structural forms); Stress cycles; Structural and Technological Strength and Performance of Materials; Welded joints; fatigue strength; high-strength steels; welded shell structures; low-cycle loads; calculation procedure
• ISSN: 2075-1133; 2075-115X
• DOI: 10.1134/S2075113322060090

—Current regulatory procedures for calculation of the fatigue strength of welded joints are of limited use for low-cycle loads and, typically, do not consider a possible variation in the asymmetry of the operating stress cycle, differences in the expected level of residual stresses, and a variety of possible joint geometries. Estimation procedures for shell structures made of high-strength steels exposed to external and internal pressure loadings were developed using experimental data on the resistance to fatigue fracture, as well as by physical simulation of individual stages of fatigue failure and summarization of data from numerical finite element studies of the stress-strain state.