04.1 - Aerospace Grade Materials, Structural Analysis, Fatigue and Damage Tolerance
FATIGUE OF NOTCHED STANDARD SPECIMENS – THE INFLUENCE OF THE STRESS GRADIENT ON THE S-N CURVE IN AL2024
S. Sieberer¹, J. Homan, Fatec Engineering, Netherlands; M. Schagerl¹; ¹Johannes Kepler University Linz, Austria
The fatigue life of three designs of notched aluminium specimens with nominally similar stress concentration factor is compared by experimental testing. It is shown to be dependent on the geometry of the notch, i.e. the stress gradient, and size of specimen. Usual correction factors do not account for this and new approaches may be necessary to utilise the full potential of the material.