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Characterization of concrete by a multiscale approach
In this paper different length scales that are needed to set up a multiscale model for concrete are introduced and modeled. Basically three scales are considered: the microscale, being the cement paste, the mesoscale, being the mortar, and a macroscale, being the heterogenous material concrete. At each scale a homogenization process is performed in order to obtain the constituive models for the next scale. The three-dimensional geometrical models for the cement past, the mortar and the concrete are either taken from CT-scan or they are generated taking the random structure of aggregates into consideration. The generation process is based upon Monte Carlo's simulation method wherein the aggregate particles are generated from a certain aggregate size distribution. The model for cement paste is upscaled to model pores within a hydrated cement paste (HCP) where the effective constitutive equations of the cement paste will be used to describe macro cracking in the HCP phase with pores.
Characterization of concrete by a multiscale approach
In this paper different length scales that are needed to set up a multiscale model for concrete are introduced and modeled. Basically three scales are considered: the microscale, being the cement paste, the mesoscale, being the mortar, and a macroscale, being the heterogenous material concrete. At each scale a homogenization process is performed in order to obtain the constituive models for the next scale. The three-dimensional geometrical models for the cement past, the mortar and the concrete are either taken from CT-scan or they are generated taking the random structure of aggregates into consideration. The generation process is based upon Monte Carlo's simulation method wherein the aggregate particles are generated from a certain aggregate size distribution. The model for cement paste is upscaled to model pores within a hydrated cement paste (HCP) where the effective constitutive equations of the cement paste will be used to describe macro cracking in the HCP phase with pores.
Characterization of concrete by a multiscale approach
Betonkennzeichnung mit einer mehrskaligen Näherung
Wriggers, P. (author) / Löhnert, S. (author)
2010
10 Seiten, 10 Bilder, 22 Quellen
Conference paper
English
Beton , Monte-Carlo-Simulation , Zement , Mörtel , Porosität , Hydrat , Rissbildung
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