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Article Dans Une Revue International Journal of Fracture Année : 2023

Revisiting facet nucleation under mixed mode I+III loading with T-stress and mode-dependent fracture properties

Résumé

We study the problem of crack front segmentation into facets under mixed mode I+III loading. Discrete facet network nucleation is determined based on the match asymptotic expansion approach of the coupled criterion considering both the influence of T-stress (parallel to the initial crack front) and modedependent fracture properties. We show that considering exclusively either T-stress or mode dependent properties, facet nucleation may be more favorable than straight crack propagation but in conditions that are incompatible with experimental observations. It is only by coupling mode-dependent fracture properties with T-stress that we are able to determine configurations compatible with experimental observations for which facet nucleation is more likely to occur than straight crack propagation. These configurations depend on the T-stress magnitude and critical shear energy release rate. We thus highlight that crack front segmentation into facets is material and loading dependent phenomenon that is not related to a sole mode mixity threshold but also to T-stress magnitude and shear critical energy release rate.
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Dates et versions

hal-04099410 , version 1 (16-05-2023)
hal-04099410 , version 2 (20-05-2023)

Identifiants

Citer

Aurélien Doitrand, Dominique Leguillon, Gergely Molnár, Veronique Lazarus. Revisiting facet nucleation under mixed mode I+III loading with T-stress and mode-dependent fracture properties. International Journal of Fracture, 2023, ⟨10.1007/s10704-023-00703-0⟩. ⟨hal-04099410v2⟩
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