Material characterization based on micro-structural computations and homogenization
- verfasst von
- Peter Wriggers, M. Hain
- Abstract
Based on a micro-structural finite-element model using computer-tomography scans at micro meter length-scale, damage due to frost within hardened cement paste (HCP) is evaluated. In order to establish microscopic constitutive equations comparison with experimental data at macro-level are performed together with parameter identification. 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. Upscaling then leads to an effective correlation between moisture, temperature and the inelastic material behaviour. Finally, thermomechanically coupling is introduced on the macro-scale and an effective constitutive equation for HCP is developed using the abovementioned temperature-moisture-damage correlation.
- Organisationseinheit(en)
-
Institut für Kontinuumsmechanik
- Externe Organisation(en)
-
Mercedes-Benz Group AG
- Typ
- Aufsatz in Konferenzband
- Seiten
- 15-26
- Anzahl der Seiten
- 12
- Publikationsdatum
- 2008
- Publikationsstatus
- Veröffentlicht
- Peer-reviewed
- Ja
- ASJC Scopus Sachgebiete
- Tief- und Ingenieurbau, Fahrzeugbau, Luft- und Raumfahrttechnik, Akustik und Ultraschall, Maschinenbau
