A microscale model for concrete failure in poro-elasto-plastic media

verfasst von
Fadi Aldakheel
Abstract

This work provides a micromechanical framework for modeling water-induced failure mechanisms of concrete in an experimental-virtual lab. The complicated geometry and content of concrete at a lower scale can be detected by a computed tomography (micro-CT) scan. Based on the experimental observations, we developed a constitutive model for the coupled problem of fluid-saturated heterogeneous porous media at fracture. The poro-plasticity model is additively decomposed into reversible-elastic and irreversible-plastic parts. The governing formulations are based on an energetic response function and a dissipated work due to plasticity (Drucker-Prager model), fluid transport (Darcy's law) and fracture (phase-field method) for the multiphysics problem. The model performance is demonstrated through some representative examples in 2D, representing an idealized microstructure of concrete.

Organisationseinheit(en)
Institut für Kontinuumsmechanik
Typ
Artikel
Journal
Theoretical and Applied Fracture Mechanics
Band
107
ISSN
0167-8442
Publikationsdatum
06.2020
Publikationsstatus
Veröffentlicht
Peer-reviewed
Ja
ASJC Scopus Sachgebiete
Werkstoffwissenschaften (insg.), Physik der kondensierten Materie, Maschinenbau, Angewandte Mathematik
Elektronische Version(en)
https://doi.org/10.1016/j.tafmec.2020.102517 (Zugang: Geschlossen)
 

Details im Forschungsportal „Research@Leibniz University“