Skip to Main content Skip to Navigation
Journal articles

Modeling flat to slant fracture transition using the computational cell methodology

Abstract : Macroscopic mode I ductile crack propagation in metallic sheets or plates often starts in mode I as a flat triangle (coplanar with the precrack) whose normal corresponds to the loading direction. After some limited extension, the crack becomes slanted and propagates under local mixed mode I/III. Modeling and understanding this phenomenon is challenging. In this work, the "computational cell" methodology proposed in [1], which uses a predefined crack path, is used to study flat to slant fracture transition. The energy dissipation rate is studied as a function of the assumed crack tilt angle. It is shown that a minimum is always reached for an angle equal to 45°. This correlates well with the variation of the crack tip opening angle (CTOA) or the mean plastic deformation along the crack path. Stress and strain states in the stable tearing region hardly depend on the assumed tilt angle. A parametric study shows that flat to slant fracture transition is less likely to occur in materials having high work hardening and favored if additional damage is caused by the local stress/strain state (plane strain, low Lode parameter) in the stable tearing region.
Document type :
Journal articles
Complete list of metadatas

https://hal-mines-paristech.archives-ouvertes.fr/hal-00830626
Contributor : Bibliothèque Umr7633 <>
Submitted on : Wednesday, June 5, 2013 - 2:52:37 PM
Last modification on : Wednesday, October 14, 2020 - 4:02:01 AM

Identifiers

Citation

Jacques Besson, E.S. Drexler, C.N. Mc Cowan. Modeling flat to slant fracture transition using the computational cell methodology. Engineering Fracture Mechanics, Elsevier, 2013, 104, pp.80-95. ⟨10.1016/j.engfracmech.2013.02.032⟩. ⟨hal-00830626⟩

Share

Metrics

Record views

219