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

verfasst von
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.

Organisationseinheit(en)
Institut für Kontinuumsmechanik
Typ
Artikel
Journal
Finite Elements in Analysis and Design
Band
44
Seiten
233-244
Anzahl der Seiten
12
ISSN
0168-874X
Publikationsdatum
01.03.2008
Publikationsstatus
Veröffentlicht
Peer-reviewed
Ja
ASJC Scopus Sachgebiete
Analysis, Ingenieurwesen (insg.), Computergrafik und computergestütztes Design, Angewandte Mathematik
Elektronische Version(en)
https://doi.org/10.1016/j.finel.2007.11.020 (Zugang: Unbekannt)
 

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