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Title: Multiscale Concrete Modeling of Aging Degradation

Abstract

In this work a numerical finite element framework is implemented to enable the integration of coupled multiscale and multiphysics transport processes. A User Element subroutine (UEL) in Abaqus is used to simultaneously solve stress equilibrium, heat conduction, and multiple diffusion equations for 2D and 3D linear and quadratic elements. Transport processes in concrete structures and their degradation mechanisms are presented along with the discretization of the governing equations. The multiphysics modeling framework is theoretically extended to the linear elastic fracture mechanics (LEFM) by introducing the eXtended Finite Element Method (XFEM) and based on the XFEM user element implementation of Giner et al. [2009]. A damage model that takes into account the damage contribution from the different degradation mechanisms is theoretically developed. The total contribution of damage is forwarded to a Multi-Stage Fatigue (MSF) model to enable the assessment of the fatigue life and the deterioration of reinforced concrete structures in a nuclear power plant. Finally, two examples are presented to illustrate the developed multiphysics user element implementation and the XFEM implementation of Giner et al. [2009].

Authors:
 [1];  [1];  [1]
  1. Mississippi State Univ., Mississippi State, MS (United States)
Publication Date:
Research Org.:
Mississippi State Univ., Mississippi State, MS (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1223389
Report Number(s):
10-956
10-956
DOE Contract Number:  
AC07-05ID14517
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English

Citation Formats

Hammi, Yousseff, Gullett, Philipp, and Horstemeyer, Mark F. Multiscale Concrete Modeling of Aging Degradation. United States: N. p., 2015. Web. doi:10.2172/1223389.
Hammi, Yousseff, Gullett, Philipp, & Horstemeyer, Mark F. Multiscale Concrete Modeling of Aging Degradation. United States. https://doi.org/10.2172/1223389
Hammi, Yousseff, Gullett, Philipp, and Horstemeyer, Mark F. 2015. "Multiscale Concrete Modeling of Aging Degradation". United States. https://doi.org/10.2172/1223389. https://www.osti.gov/servlets/purl/1223389.
@article{osti_1223389,
title = {Multiscale Concrete Modeling of Aging Degradation},
author = {Hammi, Yousseff and Gullett, Philipp and Horstemeyer, Mark F.},
abstractNote = {In this work a numerical finite element framework is implemented to enable the integration of coupled multiscale and multiphysics transport processes. A User Element subroutine (UEL) in Abaqus is used to simultaneously solve stress equilibrium, heat conduction, and multiple diffusion equations for 2D and 3D linear and quadratic elements. Transport processes in concrete structures and their degradation mechanisms are presented along with the discretization of the governing equations. The multiphysics modeling framework is theoretically extended to the linear elastic fracture mechanics (LEFM) by introducing the eXtended Finite Element Method (XFEM) and based on the XFEM user element implementation of Giner et al. [2009]. A damage model that takes into account the damage contribution from the different degradation mechanisms is theoretically developed. The total contribution of damage is forwarded to a Multi-Stage Fatigue (MSF) model to enable the assessment of the fatigue life and the deterioration of reinforced concrete structures in a nuclear power plant. Finally, two examples are presented to illustrate the developed multiphysics user element implementation and the XFEM implementation of Giner et al. [2009].},
doi = {10.2172/1223389},
url = {https://www.osti.gov/biblio/1223389}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jul 31 00:00:00 EDT 2015},
month = {Fri Jul 31 00:00:00 EDT 2015}
}