About the regularities of fatigue fracture and fatigue strength due to the influence of asymmetry of the tension cycle

V. P. BAGMUTOV, A. A. BELOV, V. I. VODOPYANOV, O. V. KONDRATYEV

Abstract


The fatigue curves are obtained and the regulari-ties of the effect of the tensile cycle asymmetry in the range –2 ≤ R ≤ 0.5 on the length and position of the transi-tion section of the fatigue curve of steel 45 and titanium alloy PT-3V are investigated. Diagrams of limit amplitudes for the studied alloys are constructed. A method for calcu-lating the position and length of the transition stage of the fatigue curve is proposed.

DOI: http://dx.doi.org/10.5755/j01.mech.24.5.14474


Keywords


fatigue fracture; the asymmetry cycle ratio; 45 steel; titanium alloy PT-3V; the curve of fatigue

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Print ISSN: 1392-1207
Online ISSN: 2029-6983