Naslov
Scalar damage model for concrete without explicit evolution law

Autori
Ožbolt, Joško ; Ananiev, Sergej

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the EURO-C 2003 Conference on Computational Modelling of Concrete Structures / N. Bicanic, R. de Borst, H. Mang, G. Meschke - Lisse : A.A. Balkema Publishers, 2003, 100-108

ISBN
90 5809 536 3

Skup
Computational Modelling of Concrete Structures

Mjesto i datum
Mayrhofen, Austrija, 27.03.2003. - 30.03.2003

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Concrete; damage; finite elements

Sažetak
Based on the fact that for an isotropic material model the elastic predictor and the projected stress tensors have the same eigenvectors, it is shown that the scalar damage can be obtained directly from the projection algorithm. This eliminates the difficulty of a proper definition of equivalent strain which serves as a driving force for evolution of damage in concrete. Moreover, if eigenvectors are known it is not more nec-essary to use invariants of the stress tensor for the formulation of loading surface. In the present model the loading surface is represented in the polynomial form. This has two advantages: (i) it automatically fulfils C1 continuity and (ii) plane stress formulation is achieved by simply setting the third stress to zero. The perform-ance of the model is illustrated on example of a mixed-mode fracture of concrete. It is shown that for the pre-sent example the model prediction strongly depends on the choice of the stress degradation law.

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo

POVEZANOST RADA