Fatigue Crack Growth in Specimens with Rectangular Section under Torsion and Bending with Torsion
The paper presents the test results on the fatigue crack growth under torsion and proportional bending with torsion in the aluminium alloy EN AW 2017A T4. The tests were performed at the fatigue test stand MZGS 100 at the constant amplitude of moment MB MT MBT 15.84 Nm and stress ratio R 1. Plane specimens with stress concentrators in form of the external one sided blunt notch were tested. The results of experiments were described on graphs of the fatigue crack length ,a" versus numbers of cycles N. A non uniform fatigue cracks growth on both lateral surfaces of specimens was observed during experimental tests.