Mesoscale models for concrete

Homogenisation and damage behaviour

authored by: Peter Wriggers, S. O. Moftah
Abstract: In this paper three-dimensional geometrical models for concrete are generated taking the random structure of aggregates at the mesoscopic level 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 and then placed into the concrete specimen in such a way that there is no intersection between the particles. For high volume fractions of aggregates, new algorithms for generating realistic concrete models are proposed. The generated geometrical models are then meshed using the aligned approach in which the finite element boundaries are coincident with materials interfaces and therefore there are no material discontinuities within the elements. The finite element method (FEM) is used in the direct computation of the effective properties of concrete. The results obtained from the numerical simulations and the subsequent homogenisation are then compared with experimental data. Furthermore numerical simulations of the damage and fracture process of concrete are performed using an isotropic damage model to model the progressive degradation of concrete. Finally, a concrete block is investigated where numerical and experimental results are discussed.
Organisation(s): Institute of Mechanics and Computational Mechanics
Type: Article
Journal: Finite Elements in Analysis and Design
Volume: 42
Pages: 623-636
No. of pages: 14
ISSN: 0168-874X
Publication date: 04.2006
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.2005.11.008 (Access: Unknown)
: Details in the research portal "Research@Leibniz University"

BibTeX

@article{f9bb35e3db7945178b10bad4b257a0c5,
title = "Mesoscale models for concrete: Homogenisation and damage behaviour",
abstract = "In this paper three-dimensional geometrical models for concrete are generated taking the random structure of aggregates at the mesoscopic level 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 and then placed into the concrete specimen in such a way that there is no intersection between the particles. For high volume fractions of aggregates, new algorithms for generating realistic concrete models are proposed. The generated geometrical models are then meshed using the aligned approach in which the finite element boundaries are coincident with materials interfaces and therefore there are no material discontinuities within the elements. The finite element method (FEM) is used in the direct computation of the effective properties of concrete. The results obtained from the numerical simulations and the subsequent homogenisation are then compared with experimental data. Furthermore numerical simulations of the damage and fracture process of concrete are performed using an isotropic damage model to model the progressive degradation of concrete. Finally, a concrete block is investigated where numerical and experimental results are discussed.",
keywords = "Concrete, Damage, Finite element, Homogenisation, Sieve curves",
author = "Peter Wriggers and Moftah, {S. O.}",
year = "2006",
month = apr,
doi = "10.1016/j.finel.2005.11.008",
language = "English",
volume = "42",
pages = "623--636",
journal = "Finite Elements in Analysis and Design",
issn = "0168-874X",
publisher = "Elsevier",
number = "7",
}