A Comprehensive Study of Fatigue Crack Initiation and Growth under Very High Cycle Torsional Fatigue Loading

This paper investigates the fatigue behavior of smooth specimens made of VT3-1 titanium alloy under fully reversed loading conditions. Mathematical modeling results are presented for the fatigue fracture of smooth specimens under high cycle torsional fatigue loading. The fatigue quasi-crack initiation and growth are calculated using a multimode two-parameter model of fatigue damage accumulation. The surface and subsurface quasi-crack initiation under torsional loading is studied. The numerical results are in good agreement with the experimental data and can be used to predict the change in crack growth mechanisms under complex multiaxial loadings such as torsion.

Automated summary

This paper investigates the fatigue behavior of smooth specimens made of VT3-1 titanium alloy under fully reversed loading conditions. The fatigue fracture of smooth specimens under high cycle torsional fatigue loading is modeled, and the initiation and growth of fatigue quasi-cracks are calculated. The study examines the initiation of surface and subsurface quasi-cracks under torsional loading. The numerical results are in good agreement with experimental data and can be used to predict the change in crack growth mechanisms under complex multiaxial loadings such as torsion.