Open AccessNumerical modelingof a composite section element from thin-walled profiles taking into account the initial geometric imperfections
Author(s) -
D. A. Prostakishina,
N. D. Korsun
Publication year - 2020
Publication title -
vestnik graždanskih inženerov
Language(s) - English
Resource type - Journals
ISSN - 1999-5571
DOI - 10.23968/1999-5571-2020-17-1-82-86
Subject(s) - buckling , structural engineering , finite element method , composite number , bending , compression (physics) , stability (learning theory) , load bearing , section (typography) , element (criminal law) , computer simulation , moving load , cross section (physics) , bearing (navigation) , materials science , mechanics , engineering , computer science , physics , composite material , quantum mechanics , machine learning , law , political science , operating system , artificial intelligence
The article describes the process of numerical simulation of a composite symmetric section element made of thin-walled Sigma profiles operating under conditions of longitudinal compressive force with bending, taking into account the initial geometric imperfections. At numerical modeling, the main criterion of the load-bearing capacity exhaustion in case of eccentric compression is the stability loss in one of the forms. However, for thin-walled elements, the loss of local stability does not mean that the load-bearing capacity is completely exhausted, since the element continues to carry the load, but to a lesser extent. Therefore, simulation was carried out in two stages: initially, in the elastic formulation, the possible buckling modes were determined, afterwards, there was made calculation on the deformed pattern taking into account possible imperfections.