Details
| Original language | English |
|---|---|
| Pages (from-to) | 233-244 |
| Number of pages | 12 |
| Journal | Finite Elements in Analysis and Design |
| Volume | 44 |
| Issue number | 5 |
| Publication status | Published - 1 Mar 2008 |
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
ASJC Scopus subject areas
- Mathematics(all)
- Analysis
- Engineering(all)
- Computer Science(all)
- Computer Graphics and Computer-Aided Design
- Mathematics(all)
- Applied Mathematics
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In: Finite Elements in Analysis and Design, Vol. 44, No. 5, 01.03.2008, p. 233-244.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Computational homogenization of micro-structural damage due to frost in hardened cement paste
AU - Hain, M.
AU - Wriggers, Peter
N1 - Funding information: Financial support from the Deutsche Forschungsgemeinschaft (German Research Foundation) under contract number SPP1122 is gratefully appreciated. The Bundesanstalt für Materialforschung undprüfung (Dr. Urs Müller) 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 für Bauforschung (Director: Prof. Brameshuber) at RWTH Aachen, Germany. Special thanks are addressed to Matthias Koster who generated the artificially saturated micro-structures of HCP.
PY - 2008/3/1
Y1 - 2008/3/1
N2 - 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.
AB - 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.
KW - Damage due to frost
KW - Hardened cement paste
KW - Micro-structure
KW - Multi-scale model
UR - http://www.scopus.com/inward/record.url?scp=40249114884&partnerID=8YFLogxK
U2 - 10.1016/j.finel.2007.11.020
DO - 10.1016/j.finel.2007.11.020
M3 - Article
AN - SCOPUS:40249114884
VL - 44
SP - 233
EP - 244
JO - Finite Elements in Analysis and Design
JF - Finite Elements in Analysis and Design
SN - 0168-874X
IS - 5
ER -