Assessment of the bearing capacity of welded joints for an arbitrary character of failure

¹ Ufa State Petroleum Technological University, Kosmonavtov Str. 1, Ufa, 450062, the Republic of Bashkortostan, Russia
² Air Force Military Educational and Scientific Centre Air Force Academy n.a. Prof. N.E. Zhukovsky and Yu.A. Gagarin, Gorodok-11, 1, Chelyabinsk, 454015, Russia

^* Corresponding author: olgai3@mail.ru

Abstract

In this paper, we propose one of the approaches to assess the load-bearing capacity of metal structures for an arbitrary type of failure based on the use of interpolation-type criteria based on the principle of boundary interpolation. This approach allows for the standardization of defects taking into account their location, sharpness at the top, as well as the properties of the base metal or welded joints. The use of the calculated calculated ratios that have been experimentally confirmed during the testing of welded joints with surface defects allows us to estimate the range of their admissible sizes that do not lead to a decrease in operating loads acting on welded metal structures during their operation, proceeding from ensuring the required level of allowable stresses. This range of permissible defect sizes is determined by a number of parameters characterizing the type of defect, the mechanical properties of the weld metal, the type, stiffness and concentration of the stressed state, the thickness of the metal structures, the operating conditions (temperature T), and the accepted safety factor.