Open AccessEvaluation of efficiency of the “K” welded repair technology of marine stationary platform with account ofaccumulated damages
Author(s) -
I. V. Starokon
Publication year - 2020
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/860/1/012025
Subject(s) - welding , joint (building) , submarine pipeline , residual , life extension , structural engineering , residual stress , fracture (geology) , amplitude , computer science , materials science , engineering , mechanical engineering , composite material , geotechnical engineering , algorithm , physics , gerontology , medicine , quantum mechanics
The article discusses the problems associated with calculating the residual life of welded joints of offshore stationary platforms using the example of “K” -type joints. It should be noted that the residual life of such repaired compounds is still not well understood. The author built computer models of offshore platforms, which made it possible to determine the values of the maximum amplitudes of the alternating stresses that arise during the operation of the platform. Based on this information, the author justified the conditions of the experiment. The article describes the method of repairing a crack by the method of its welding with the establishment of so-called “crack traps” along the edges of the crack. The experiment was carried out under conditions of primary and repeated fracture of the welded joint “K” – type. As a result of the studies for the described repair technology, the endurance limits of the repaired K-type welded joints were calculated, which is 13.3 MPa based on the cycle Ng = 3 * 10 6 .