Computational homogenization of micro-structural damage due to frost in hardened cement paste

authored by: M. Hain, Peter Wriggers
Abstract: Based on a micro-structural finite-element model using computer-tomography scans at micrometer length-scale, damage due to frost within hardened cement paste (HCP) is evaluated. In order to verify the microscopic constitutive equations, a multi-scale model is introduced which allows a comparison with experimental data at macro-level. Subsequently, damage due to frost is simulated numerically: the water-filled pores of HCP increase in volume during a freezing process which yields an inelastic material behavior. Numerical simulations at micro-structural level are performed for different moistures and temperatures, and an effective correlation between moisture, temperature and the inelastic material behavior is obtained. Finally, thermo-mechanical coupling is introduced and an effective constitutive equation for HCP is developed using the abovementioned temperature-moisture-damage correlation.
Organisation(s): Institute of Continuum Mechanics
Type: Article
Journal: Finite Elements in Analysis and Design
Volume: 44
Pages: 233-244
No. of pages: 12
ISSN: 0168-874X
Publication date: 01.03.2008
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Analysis, Engineering(all), Computer Graphics and Computer-Aided Design, Applied Mathematics
Electronic version(s): https://doi.org/10.1016/j.finel.2007.11.020 (Access: Unknown)
: Details in the research portal "Research@Leibniz University"

BibTeX

@article{0d213be2e30146d4be33b0a6cb3e3d5a,
title = "Computational homogenization of micro-structural damage due to frost in hardened cement paste",
abstract = "Based on a micro-structural finite-element model using computer-tomography scans at micrometer length-scale, damage due to frost within hardened cement paste (HCP) is evaluated. In order to verify the microscopic constitutive equations, a multi-scale model is introduced which allows a comparison with experimental data at macro-level. Subsequently, damage due to frost is simulated numerically: the water-filled pores of HCP increase in volume during a freezing process which yields an inelastic material behavior. Numerical simulations at micro-structural level are performed for different moistures and temperatures, and an effective correlation between moisture, temperature and the inelastic material behavior is obtained. Finally, thermo-mechanical coupling is introduced and an effective constitutive equation for HCP is developed using the abovementioned temperature-moisture-damage correlation.",
keywords = "Damage due to frost, Hardened cement paste, Micro-structure, Multi-scale model",
author = "M. Hain and Peter Wriggers",
note = "Funding information: Financial support from the Deutsche Forschungsgemeinschaft (German Research Foundation) under contract number SPP1122 is gratefully appreciated. The Bundesanstalt f{\"u}r Materialforschung undpr{\"u}fung (Dr. Urs M{\"u}ller) in Berlin assigned the micro-CT scans of HCP, which were tested at the European Synchrotron Radiation Facility in Grenoble by Dr. Lukas Helfen. All experimental results of HCP were performed by the Institut f{\"u}r Bauforschung (Director: Prof. Brameshuber) at RWTH Aachen, Germany. Special thanks are addressed to Matthias Koster who generated the artificially saturated micro-structures of HCP.",
year = "2008",
month = mar,
day = "1",
doi = "10.1016/j.finel.2007.11.020",
language = "English",
volume = "44",
pages = "233--244",
journal = "Finite Elements in Analysis and Design",
issn = "0168-874X",
publisher = "Elsevier",
number = "5",
}