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A damage-plasticity interface approach to the meso-scale modelling of concrete subjected to cyclic compressive loading
Concrete is characterised by stiff inclusions in a soft matrix separated by weak interfacial transition zones (ITZs). Subjected to cyclic loading, this material exhibits a strongly nonlinear response, which is characterised by the occurrence of hysteresis loops. Furthermore, for cyclic loading, failure may occur before the equivalent strength for monotonic loading is reached. The present work investigates, whether the occurrence of permanent displacements in different phases of the meso-structure of quasi-brittle heterogeneous materials, such as concrete, leads to damage evolution during repeated loading. A new three-dimensional interface model based on a combination of damage mechanics and the theory of plasticity is proposed, which allows one to control the ratio of permanent and total inelastic displacements. The model is based on only a few material parameters, which can be directly determined by experiments. The interface model is applied to the plane-stress analysis of an idealised heterogeneous material with cylindrical inclusions and ITZs subjected to cyclic compressive stresses.
A damage-plasticity interface approach to the meso-scale modelling of concrete subjected to cyclic compressive loading
Concrete is characterised by stiff inclusions in a soft matrix separated by weak interfacial transition zones (ITZs). Subjected to cyclic loading, this material exhibits a strongly nonlinear response, which is characterised by the occurrence of hysteresis loops. Furthermore, for cyclic loading, failure may occur before the equivalent strength for monotonic loading is reached. The present work investigates, whether the occurrence of permanent displacements in different phases of the meso-structure of quasi-brittle heterogeneous materials, such as concrete, leads to damage evolution during repeated loading. A new three-dimensional interface model based on a combination of damage mechanics and the theory of plasticity is proposed, which allows one to control the ratio of permanent and total inelastic displacements. The model is based on only a few material parameters, which can be directly determined by experiments. The interface model is applied to the plane-stress analysis of an idealised heterogeneous material with cylindrical inclusions and ITZs subjected to cyclic compressive stresses.
A damage-plasticity interface approach to the meso-scale modelling of concrete subjected to cyclic compressive loading
Eine plastische Grenzflächenschädigungsnäherung zur meso-skaligen Modellbeschreibung von Beton bei zyklischer Druckbeanspruchung
Grassl, Peter (author) / Rempling, Rasmus (author)
Engineering Fracture Mechanics ; 75 ; 4804-4818
2008
15 Seiten, 57 Quellen
Article (Journal)
English
Massivbau , Beton , Wechsellastbeanspruchung , dynamische Belastung , Elastizität , Hysterese , numerisches Verfahren , Plastizität , dreidimensionale Darstellung , Druckbeanspruchung , Schädigungsmechanismus , heterogenes Material , nichtmetallischer Einschluss , nichtlinearer Effekt , Grenzflächenverhalten , Plastizitätstheorie , bleibende Verformung , Theorie-Experiment-Vergleich , mathematisches Modell
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