TY - JOUR

T1 - A microscale model for concrete failure in poro-elasto-plastic media

AU - Aldakheel, Fadi

N1 - 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. Blaž Hudobivnik for his support with numerical issues. Professors Peter Wriggers (IKM) and Ludger Lohaus (IfB) detailed comments and suggestions are highly acknowledged.

PY - 2020/6

Y1 - 2020/6

N2 - 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.

AB - 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.

KW - Concrete

KW - Experimental observation

KW - Microstructure

KW - Phase-field modeling

KW - Poro-plasticity

UR - http://www.scopus.com/inward/record.url?scp=85081125711&partnerID=8YFLogxK

U2 - 10.1016/j.tafmec.2020.102517

DO - 10.1016/j.tafmec.2020.102517

M3 - Article

AN - SCOPUS:85081125711

VL - 107

JO - Theoretical and Applied Fracture Mechanics

JF - Theoretical and Applied Fracture Mechanics

SN - 0167-8442

M1 - 102517

ER -