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

authored by: 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.
Organisation(s): Institute of Continuum Mechanics
Type: Article
Journal: Theoretical and Applied Fracture Mechanics
Volume: 107
ISSN: 0167-8442
Publication date: 06.2020
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: General Materials Science, Condensed Matter Physics, Mechanical Engineering, Applied Mathematics
Electronic version(s): https://doi.org/10.1016/j.tafmec.2020.102517 (Access: Closed)
: Details in the research portal "Research@Leibniz University"

BibTeX

@article{edbcc8bf3f1b4878a5f3cfb82ce8feea,
title = "A microscale model for concrete failure in poro-elasto-plastic media",
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.",
keywords = "Concrete, Experimental observation, Microstructure, Phase-field modeling, Poro-plasticity",
author = "Fadi Aldakheel",
note = "Funding Information: The corresponding author (FA) gratefully acknowledges support for this research by the “German Research Foundation” ( DFG ) in the Priority Program SPP 2020 within its second funding phase. FA would like to thank Dr. Bla{\v z} Hudobivnik for his support with numerical issues. Professors Peter Wriggers (IKM) and Ludger Lohaus (IfB) detailed comments and suggestions are highly acknowledged. ",
year = "2020",
month = jun,
doi = "10.1016/j.tafmec.2020.102517",
language = "English",
volume = "107",
journal = "Theoretical and Applied Fracture Mechanics",
issn = "0167-8442",
publisher = "Elsevier",
}