Fatigue crack growth in 2017A-T4 alloy subjected to proportional bending with torsion
DOI:
https://doi.org/10.3221/IGF-ESIS.42.03Keywords:
Fatigue crack growth, Load ratio, Notch, Bending with torsionAbstract
The paper presents the results of tests on the fatigue crack growth for a constant moment amplitude under combined bending with torsion in the aluminium alloy AW-2017A-T4. The tests were performed under different values of the load ratio R. Plane specimens with stress concentrators in form of the external one-sided sharp notch were tested. A non-uniform fatigue cracks growth on both lateral surfaces of specimens was observed during experimental tests. Fatigue cracks were developing in the specimens in two stages; quarter-elliptic edge cracks were observed at the beginning, then evolving into through cracks.
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