Numerical implementation of an anisotropic continuum damage model

Description

In this talk, a thermodynamic formulation for modelling anisotropic damage of elastic-brittlematerials based on Ottosen’s 4-parameter failure surface is proposed. The model is developedby using proper expressions for the Gibbs free energy depending of two second order symmetrictensors - the stress tensor and the damage tensor - and the complementary form of the dissipationpotential. The theory of invariants is utilized in constructing the potential functions. Theformulation predicts the basic characteristic behaviour of concrete well and results in a realisticshape for the damage surface. Implementation of the model to the finite element programELMER as a material model subroutine has been carried out. Simulation results for some wellknown test-cases will be shown.

Aikajakso	27 kesäk. 2019
Tapahtuman otsikko	International Conference on Material Modelling
Tapahtuman tyyppi	Conference
Konferenssinumero	6
Sijainti	Lund, RuotsiNäytä kartalla
Tunnustuksen arvo	International