Open AccessImpact of weld seams and connected elements parameters on stress concentration
Author(s) -
Aleksandr Shuvalov,
Oleg Emel’yanov,
Mikhail Kovalev
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/687/3/033022
Subject(s) - structural engineering , durability , stress concentration , stress (linguistics) , welding , fracture (geology) , materials science , deformation (meteorology) , finite element method , engineering , composite material , linguistics , philosophy
Existing construction regulations use durability estimations in nominal stress to ensure structural parameters of building elements. The maintenance time factor is only indirectly accounted for by load safety and service factors. Decreasing the number of accidents and minimising the damage caused by them leads to need of reliability and durability prediction for structural elements that go through cyclic loads. To make a reasonable choice regarding the sizes of constructive forms (due to concentration zones) of such elements, deformation criteria of fracture should be used. This makes it possible to account for kinetics of local elastoplastic deformations, with one-time and cyclic loads. Nowadays, dependencies connecting concentration coefficients of elastoplastic pressure and deformations with a concentration coefficient for elastic stress have been found. This article presents the results of change in elastic stress concentration coefficient around the heel and toe in zones of the fracture of gusset plates and from the frontal angles depending on their structural parameters (width and thickness of the angle’s shelf, thickness of gusset plate, length and cathetus of weld) based on the research on stress strain behavior of rods of the T-section from paired equilateral angles using the finite element method.