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Article

Reduced Order Multiscale Simulation of Diffuse Damage in Concrete

1
Institute for Structural Mechanics, Ruhr University Bochum, Universitaetsstrasse 150, 44801 Bochum, Germany
2
Chair of Materials Science and Testing, Centre for Building Materials, Technical University of Munich, Franz-Langinger-Strasse 10, 81245 Munich, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Jeong-Gook Jang
Materials 2021, 14(14), 3830; https://doi.org/10.3390/ma14143830
Received: 10 June 2021 / Revised: 1 July 2021 / Accepted: 5 July 2021 / Published: 8 July 2021
(This article belongs to the Collection Concrete and Construction Materials)
Damage in concrete structures initiates as the growth of diffuse microcracks that is followed by damage localisation and eventually leads to structural failure. Weak changes such as diffuse microcracking processes are failure precursors. Identification and characterisation of these failure precursors at an early stage of concrete degradation and application of suitable precautionary measures will considerably reduce the costs of repair and maintenance. To this end, a reduced order multiscale model for simulating microcracking-induced damage in concrete at the mesoscale level is proposed. The model simulates the propagation of microcracks in concrete using a two-scale computational methodology. First, a realistic concrete specimen that explicitly resolves the coarse aggregates in a mortar matrix was generated at the mesoscale. Microcrack growth in the mortar matrix is modelled using a synthesis of continuum micromechanics and fracture mechanics. Model order reduction of the two-scale model is achieved using a clustering technique. Model predictions are calibrated and validated using uniaxial compression tests performed in the laboratory. View Full-Text
Keywords: concrete; mesoscale; reduced order multiscale simulation; microcracking; micromechanics; linear elastic fracture mechanics; anisotropic damage concrete; mesoscale; reduced order multiscale simulation; microcracking; micromechanics; linear elastic fracture mechanics; anisotropic damage
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MDPI and ACS Style

Vu, G.; Diewald, F.; Timothy, J.J.; Gehlen, C.; Meschke, G. Reduced Order Multiscale Simulation of Diffuse Damage in Concrete. Materials 2021, 14, 3830. https://doi.org/10.3390/ma14143830

AMA Style

Vu G, Diewald F, Timothy JJ, Gehlen C, Meschke G. Reduced Order Multiscale Simulation of Diffuse Damage in Concrete. Materials. 2021; 14(14):3830. https://doi.org/10.3390/ma14143830

Chicago/Turabian Style

Vu, Giao, Fabian Diewald, Jithender J. Timothy, Christoph Gehlen, and Günther Meschke. 2021. "Reduced Order Multiscale Simulation of Diffuse Damage in Concrete" Materials 14, no. 14: 3830. https://doi.org/10.3390/ma14143830

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