Finite element meshes for optimal modelling of plasticity induced crack closure

Antunes, F.V.; Camas, D.; Correia, Luís M.; Branco, R.

http://hdl.handle.net/10400.11/5522

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Authors

Antunes, F.V.

Camas, D.

Correia, Luís M.

Branco, R.

Abstract(s)

The main goal here is to optimise the finite element mesh used to predict plasticity induced crack closure (PICC). A numerical model was developed for a M(T) specimen made of 6016-T4 aluminium alloy. The parameters studied were the size of most refined region perpendicularly to crack flank (ym) and along propagation direction (xr), the size of finite elements near crack tip (L1) and the vertical size of refinement close to crack flank (yA/B). A maximum size of about 1.3mm was found for ym, but a smaller value has a limited impact on PICC. An analytical expression was proposed for xr, dependent on δK and Kmax. An optimum value seems to exist for L1.

Keywords

Plasticity induced crack closure Finite element mesh Crack tip plastic deformation Reversed plastic deformation

URI

http://hdl.handle.net/10400.11/5522

Citation

ANTUNES, F.V. [et al.] (2015) - Finite element meshes for optimal modelling of plasticity induced crack closure. Engineering Fracture Mechanics. ISSN 0013-7944. Vol. 142, p. 184-200. Doi 10.1016/j.engfracmech.2015.06.007