000013175 001__ 13175
000013175 005__ 20161114160330.0
000013175 04107 $$aeng
000013175 046__ $$k2009-06-22
000013175 100__ $$aChambart, M.
000013175 24500 $$aIntrinsic dissipation for an anisotropic 3d delay damage model - application to reinforced concrete structures under impact loadings

000013175 24630 $$n2.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013175 260__ $$bNational Technical University of Athens, 2009
000013175 506__ $$arestricted
000013175 520__ $$2eng$$aThe anisotropic damage model presented in this paper allows to describe cracking patterns and failure of quasi-brittle materials such as concrete. The dissymetry encountered in concrete between tension and compression is represented through a single thermodynamics variable D, a second order tensor. Thanks to the thermodynamics framework in which the model is written, one can ensure the positivity of intrinsic dissipation and calculate it. A viscosity law is introduced to reproduce the strain rate effect observed in tension. In compression, inertial effects are suffisants to fit with experimental observations. Computations of dynamic sollicitations on 3D concrete and reinforced concrete structures are presented, numerical and experimental results are compared. Damage, volumic dissipation and temperature maps are drawn. The effect of viscosity on total dissipation is also studied, so as regularization in dynamics.

000013175 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013175 653__ $$adamage, induced anisotropy, intrinsic dissipation, impact Abstract. The anisotropic damage model presented in this paper allows to describe cracking patterns and failure of quasi-brittle materials such as concrete. The dissymetry encountered in concrete between tension and compression is represented through a single thermodynamics variable D, a second order tensor. Thanks to the thermodynamics framework in which the model is written, one can ensure the positivity of intrinsic dissipation and calculate it. A viscosity law is introduced to reproduce the strain rate effect observed in tension. In compression, inertial effects are suffisants to fit with experimental observations. Computations of dynamic sollicitations on 3D concrete and reinforced concrete structures are presented, numerical and experimental results are compared. Damage, volumic dissipation and temperature maps are drawn. The effect of viscosity on total dissipation is also studied, so as regularization in dynamics.

000013175 7112_ $$aCOMPDYN 2009 - 2nd International Thematic Conference$$cIsland of Rhodes (GR)$$d2009-06-22 / 2009-06-24$$gCOMPDYN2009
000013175 720__ $$aChambart, M.$$iDesmorat, R.$$iGatuingt, F.$$iGuilbaud, D.
000013175 8560_ $$ffischerc@itam.cas.cz
000013175 8564_ $$s1466482$$uhttps://invenio.itam.cas.cz/record/13175/files/CD231.pdf$$yOriginal version of the author's contribution as presented on CD, section: Contact-impact problems.
000013175 962__ $$r13074
000013175 980__ $$aPAPER