Details

Autor(en) / Beteiligte

• Brünig, Michael
• Michalski, Alexander

Titel

A stress-state-dependent continuum damage model for concrete based on irreversible thermodynamics

Ist Teil von

• International journal of plasticity, 2017-03, Vol.90, p.31-43

Ort / Verlag

New York: Elsevier Ltd

Erscheinungsjahr

2017

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The paper deals with an anisotropic continuum damage model for plain concrete to provide an efficient macroscopic approach suitable for boundary-value problems involving nonlinear behavior. The thermodynamically consistent model is based on kinematic description of damage. The Helmholtz free energy function is introduced leading to an elastic constitutive equation which is affected by damage modeling deterioration of elastic material properties. A damage condition is proposed characterizing onset of damage whereas irreversible deformations and volume increase are reproduced by a damage strain tensor. Different branches of these criteria are considered corresponding to different damage mechanisms depending on stress state. Identification of material parameters is discussed in detail. A comparison of results from numerical simulation with available data from different literature experiments demonstrate the efficiency and the applicability of the proposed phenomenological framework. •A new continuum damage model for concrete is presented.•The model is able to reproduce elastic stiffness degradation.•The model is able to simulate irreversible deformations and irreversible volume increase under compression loading.