This paper studies the fatigue crack initiation and fatigue crack propagation of notched cylindrical bars made of 7050-T6 aluminium alloy subjected to multiaxial bending-torsion loading. The sites of crack initiation and the angles of crack initiation were successfully predicted from the distribution of the first principal stress at the notch surface. Fatigue crack initiation lives were computed through the new concept of energy field intensity formalised in a linear-elastic framework along with a local stress-strain model for notch plasticity analysis. Regardless of the model used to compute the cyclic response at the geometric discontinuity, the fatigue life predictions were in good agreement with the experimental observations.
Authors
- Ricardo Branco,
- José Domingos Costa,
- L.p. Borrego,
- dr hab. inż. Wojciech Macek link open in new tab ,
- Filippo Berto
Additional information
- DOI
- Digital Object Identifier link open in new tab 10.1016/j.ijfatigue.2022.106947
- Category
- Publikacja w czasopiśmie
- Type
- artykuły w czasopismach
- Language
- angielski
- Publication year
- 2022
