Poberezhny L. Regularities of deformation and failure of submarine pipelines under static and low frequency loading

It is created automated test system with computer for complex studies of the deformation, fracture, electrode potential of pipeline steel under static and low frequency loading in technological environments. Full curves of low frequency fatigue and corrosion fatigue of texturated and not texturated steel and welded join of pipes was presented. The complex concepts of low cycle and high cycle low frequency fatigue and corrosion fatigue of sea pipelines was offered. For the first time, in the field of low frequency (0,8 Hz) fatigue and corrosion fatigue, is revealed anomalous deformation behaviour texturated steel 20 and welded join, which reveals itself in deformation peaks. For the first time kinetic curves of deformation and electrode potential are presented in united type for the reason deepened their analysis, which is executed in complex with graphic interpretation of fracture surfaces macrostructure.