Influence of a 3D realistic crack path in the driving forces for fatigue crack growth under mode I+II loading

Vincent Maurel (1) , Vincent Chiaruttini (2) , Manon Abecassis (1) , Alain Köster (1) , Sébastien Dezecot (3)

1 CDM - Centre des Matériaux
2 DMAS, ONERA, Université Paris Saclay (COmUE) [Châtillon]
3 MATEIS - Matériaux, ingénierie et science [Villeurbanne]

The aim of this paper is to test the influence of different crack path models, from oversimplification currently used in literature of a straight crack front orthogonal to the specimen sides to a realistic 3D crack path. On the basis of experimental features observed for Ti17 and Ti6242 alloys under multiaxial loading, a sensitivity analysis is proposed to address the impact of realistic 3D crack path on SIF and FCGR assessment.

Mots clés: Fatigue crack growth; titanium based alloys; integral J; mode mixity

Domaines: Sciences de l'ingénieur [physics]; Physique [physics]; Chimie

Vincent Maurel, Vincent Chiaruttini, Manon Abecassis, Alain Köster, Sébastien Dezecot. Influence of a 3D realistic crack path in the driving forces for fatigue crack growth under mode I+II loading. Theoretical and Applied Fracture Mechanics, 2020, 108, pp.102570. ⟨10.1016/j.tafmec.2020.102570⟩. ⟨hal-02873578⟩