Numerical modelling of dynamic fracture

Abstract eng:
We present in this paper a brief account of recently proposed finite elements with embedded strong discontinuities for the modeling of localized failures in solids. The finite elements capture these discontinuous solutions in the displacements through a local enhancement of the element strains based on a linear interpolation of the displacement jumps. The strain enhancement is obtained by the incorporation of the proper strain modes in the discrete strain field of the element, avoiding in the process the so-called stress locking. The local character of the enhanced degrees of freedom, modeling the displacement jumps across the propagating discontinuity, allows their elimination at the element level through their static condensation, thus leading to a computationally efficient formulation, very easily incorporated into an existing finite element code. The interest in this contribution is in the evaluation of the performance of these elements in the dynamic range. To this purpose we consider representative numerical simulations involving dynamic failure mode transitions and crack branching in dynamic fracture.

• Export as: BibTeX | MARC | MARCXML | DC | EndNote | NLM | RefWorks
• Add to your basket