Tomography reconstruction of concrete materials for mesoscale modelling
| Autor: | Carmelo Maiorana, Giovanna Xotta, B. Pomaro, Gianluca Mazzucco, Valentina Salomoni |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Work (thermodynamics)
Aggregate (composite) Computer science 0211 other engineering and technologies General Engineering Mesoscale meteorology Mechanical engineering 02 engineering and technology Finite element method Computer Science Applications Elastic–plastic damage model Stress (mechanics) Recycled aggregates Digital image 020303 mechanical engineering & transports 0203 mechanical engineering Computational Theory and Mathematics Computed tomography Concrete mechanical behaviour Mesoscale 021105 building & construction Tomography Representation (mathematics) Software |
| Popis: | Purpose The purpose of this paper is the numerical assessment of concrete behaviour close to failure, via the development of robust elastoplastic models inclusive of damage effects. If mesoscale investigations are to be considered, the model must take into account the local confinement effects because of the presence of aggregate inclusions in the cement paste and, correspondingly, the possibility to account for local 3D stress states even under uniaxial compression. Additionally, to enhance the predictive capabilities of a mesoscale representation, the reconstructed geometry must accurately follow the real one. Design/methodology/approach The work provides a procedure that combines a 3D digital image technique with finite element (FE) modelling thus maintaining the original 3D morphology of the composite. Findings The potentialities of the proposed approach are discussed, giving new insights to a FE modelling (FEM)-based approach applied together with a computer-aided design. Coupled mechanisms of mechanical mismatch and confinement, characterizing the combined cement matrix-aggregates effect, are captured and highlighted via the numerical tests. Originality/value The novelty of this research work lies in the proposal of a digitally based methodology for a precise concrete reconstruction together with the adoption of an upgraded elastic–plastic damage model for the cement paste. |
| Databáze: | OpenAIRE |
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