Open AccessAsessment of corrosion fatigue strength of gas-transport system constructions under atmospheric forcing
Author(s) -
Narine Pirumyan,
M. G. Stakyan
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/698/2/022077
Subject(s) - service life , durability , welding , fatigue limit , materials science , structural engineering , corrosion , forcing (mathematics) , deformation (meteorology) , probabilistic logic , dislocation , composite material , mathematics , engineering , mathematical analysis , statistics
Calculated influence method of strengthening technology (surface plastic deformation) of gas-transport system (GTS) weld bead in the conditions of atmospheric forcing in order to increase its bearing capacity and service life is suggested. It is shown that relative strength factor of weld bead at the same time is a probabilistic function of fatigue life. Ananalogical function of the new coefficient is proposed-relative life to assess the service life of the GTS with its periodic loading. Using the system comparable and initial quantitative lines of corrosion fatigue, the equations of the functions of these coefficients are obtained, allowing to clarify the strength and durability of GTS in the real service interval and variable loading, taking into account the strengthening of weld beads.