000013590 001__ 13590
000013590 005__ 20161114165847.0
000013590 04107 $$aeng
000013590 046__ $$k2011-05-25
000013590 100__ $$aMoes, N.
000013590 24500 $$aDamage Growth As An Interface Problem :  the Thick Level Set (Tls)  Approach

000013590 24630 $$n3.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013590 260__ $$bNational Technical University of Athens, 2011
000013590 506__ $$arestricted
000013590 520__ $$2eng$$aIn this paper, we introduce a new way to model damage growth in solids. A level set is used to separate the undamaged zone from the damaged zone. In the damaged zone, the damage variable is an explicit function of the level set. This function is a parameter of the model. Beyond a critical length, we assume the material to be totally damaged, thus allowing a straightforward transition to fracture. The damage growth is expressed as a level set propagation. The configurational force driving the damage front is non local in the sense thatdamage front is non local in the sense that it averages information over the thickness in the wake of the front. The damage model may be of course dysimmetric, i.e., keeping stiffness in compression. A few important theoretical advantages of the proposed approach are as follows :     •   The zone for which the materials is fully damaged is located inside a clearly identified         domain (given by an iso- level set).     •   The non-locality steps in gradually in the model. At initiation the model is fully local. This is         in accordance with the fact that non locality is the results of micro-cracks interaction. At         initiation, micro-cracks being absent no length scale should prevail.     •   The dissipation in the proposed model is proved to be trivially positive. This proof is not         always straightforward with other nonlocal models as integral non local damage models.   Numerical examples were already described in [1] but new and more complex examples will be shown at the conference demonstrating the capability of the new model to initiate cracks and propagate them even in complex topological patterns (branching and merging for instance). 

000013590 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013590 653__ $$a

000013590 7112_ $$aCOMPDYN 2011 - 3rd International Thematic Conference$$cIsland of Corfu (GR)$$d2011-05-25 / 2011-05-28$$gCOMPDYN2011
000013590 720__ $$aMoes, N.$$iStolz, C.$$iBernard P., E.$$iChevaugeon, N.
000013590 8560_ $$ffischerc@itam.cas.cz
000013590 8564_ $$s12764$$uhttps://invenio.itam.cas.cz/record/13590/files/335.pdf$$yOriginal version of the author's contribution as presented on CD, section: MS 07 Computational Methods for Interface Problems.
000013590 962__ $$r13401
000013590 980__ $$aPAPER