000013307 001__ 13307
000013307 005__ 20161114160335.0
000013307 04107 $$aeng
000013307 046__ $$k2009-06-22
000013307 100__ $$aArmero, F.
000013307 24500 $$aNumerical modelling of dynamic fracture

000013307 24630 $$n2.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013307 260__ $$bNational Technical University of Athens, 2009
000013307 506__ $$arestricted
000013307 520__ $$2eng$$aWe 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.

000013307 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013307 653__ $$aEnhanced finite elements, strong discontinuities, dynamic fracture, failure mode transitions, crack branching. Abstract. 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.

000013307 7112_ $$aCOMPDYN 2009 - 2nd International Thematic Conference$$cIsland of Rhodes (GR)$$d2009-06-22 / 2009-06-24$$gCOMPDYN2009
000013307 720__ $$aArmero, F.$$iLinder, C.
000013307 8560_ $$ffischerc@itam.cas.cz
000013307 8564_ $$s478439$$uhttps://invenio.itam.cas.cz/record/13307/files/CD453.pdf$$yOriginal version of the author's contribution as presented on CD, section: Numerical simulation for structural dynamics.
000013307 962__ $$r13074
000013307 980__ $$aPAPER