Fracture and Structural Integrity (Oct 2017)

Fatigue crack growth in 2017A-T4 alloy subjected to proportional bending with torsion

  • D. Rozumek,
  • S. Faszynka

DOI
https://doi.org/10.3221/IGF-ESIS.42.3
Journal volume & issue
Vol. 11, no. 42
pp. 23 – 29

Abstract

Read online

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

Keywords