UDC
620.178.3:669.295
DOI
10.18577/2307-6046-2026-0-9-173-183
Article PDF (Russian) (1.24 MB)
How to cite
Ryzhkov P.V., Monin S.A., Kashapov O.S. Effect of loading frequency and cycle shape on the parameters of the fatigue crack growth kinetic diagram of VT8-1 titanium alloy // Proceedings of VIAM. 2026. No. 9 (163). С. 173-183. URL: https://www.viam-works.ru. DOI: 10.18577/2307-6046-2026-0-9-173-183.

Effect of loading frequency and cycle shape on the parameters of the fatigue crack growth kinetic diagram of VT8-1 titanium alloy

Ryzhkov P.V., Monin S.A., Kashapov O.S.
Abstract

The influence of loading frequency, dwell time at the maximum load, and block loading on fatigue crack growth kinetics in VT8-1 titanium alloy room temperature is examined. Diagrams were obtained, showing the dependence of crack growth rate da/dN on the stress intensity factor (ΔK) for a sinusoidal cycle (5–50 Hz), a trapezoidal cycle with dwell time (30–300 s), and block loading (quantity of cycles in a block 240–480). It was shown that in the stable crack growth region, an increase in the time component of the cycle and in the block duration leads to a decrease in the crack growth rate. The level of statistical scatter was determined from repeated tests.

Keywords
VT8-1 titanium alloy, fatigue crack, crack growth rate, stress intensity factor, dwell at maximum load, block loading

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The article was submitted
2026-05-05
approved and accepted for publication after reviewing
2026-06-05