Open AccessTaking into account multi-axiality of loads on marine structures in their fatigue strength calculations
Author(s) -
G. Kryzhevich,
A. Filatov
Publication year - 2019
Publication title -
trudy krylovskogo gosudarstvennogo naučnogo centra
Language(s) - English
Resource type - Journals
eISSN - 2618-8244
pISSN - 2542-2324
DOI - 10.24937/2542-2324-2019-1-s-i-153-161
Subject(s) - structural engineering , stress (linguistics) , computer science , fatigue testing , stress–strain curve , state (computer science) , finite element method , engineering , algorithm , philosophy , linguistics
This paper studies marine structures made of steels and light alloys and exposed to cyclic operational loads. Stress-strain parameters of their joints were taken from mathematical simulations of loads and strains or from actual strain gauging data.The aim of this study is to develop recommendations on fatigue strength calculations: specifically, how to quite the complex mathematical model of multi-axial loading at critical structural points with fast fatigue wear in favour of a simplified stressstrainstate description based on optimal assignment of design parameters (stresses) in fatigue failure criteria. Preferability of this approach depends on case-specific requirements to calculation accuracy and timeframes. Uniaxial description ofstressed state instead of the three-axial one enables much faster calculation with acceptable drop in accuracy.