000003892 001__ 3892
000003892 005__ 20141118153343.0
000003892 04107 $$acze
000003892 046__ $$k2009-05-11
000003892 100__ $$aHorák, M.
000003892 24500 $$aLocalization properties of isotropic damage models

000003892 24630 $$n15.$$pEngineering Mechanics 2009
000003892 260__ $$bInstitute of Theoretical and Applied Mechanics AS CR, v.v.i., Prague
000003892 506__ $$arestricted
000003892 520__ $$2eng$$aContinuum damage mechanics provides an appropriate modeling framework for materials weakened by evolving defects. However, local damage models fail to provide an objective description of the material behavior after the loss of ellipticity, which can be detected by classical methods of localization analysis based on the acoustic tensor. This paper presents analysis of localization properties of the family of isotropic damage models with one scalar damage variable driven by the equivalent strain, and also of a more sophisticated model proposed by Comi and Perego (2001) and designed specifically for concrete. Necessary conditions for the formation of a weak discontinuity (jump in strain) are derived and the dependence of the orientation of potential discontinuity surface and of the critical tangent modulus on the stress state is discussed. The results are confirmed by finite element simulations. ´

000003892 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000003892 653__ $$a

000003892 7112_ $$aEngineering Mechanics 2009$$cSvratka (CZ)$$d2009-05-11 / 2009-05-14$$gEM2009
000003892 720__ $$aHorák, M.$$iJirásek, M.
000003892 8560_ $$ffischerc@itam.cas.cz
000003892 8564_ $$s571482$$uhttps://invenio.itam.cas.cz/record/3892/files/Horak-208-PT.pdf$$y
             Original version of the author's contribution as presented on CD, 208.
            
000003892 962__ $$r3852
000003892 980__ $$aPAPER