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Numerical study of mixed-mode fracture in concrete

Ozbolt, J. / Reinhardt, H.W.

In the present paper, a finite element code based on the microplane model for concrete is used for the analysis of typical mixed-mode geometries: a Single-Edge-Notched beam, a Double-Edge-Notched specimen and a Dowel-Disk specimen. A local smeared fracture finite element analysis is carried out. As a regularization procedure, the crack band method is used. The principal objective of the study was to investigate whether the smeared fracture finite element code is able to predict mixed-mode fracture of concrete with no optimisation of the material model parameters. Comparison between experimental and numerical results shows that the used code predicts structural response and crack patterns realistically for all cases investigated. Moreover, it is shown that for most of the Studied geometries a mixed-mode fracture mechanism dominates at crack initiation, however, with increase of the crack length mode-1 fracture becomes dominant and the specimens finally failed in mode-1 fracture.

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Numerical study of mixed-mode fracture in concrete

Ozbolt, J. / Reinhardt, H.W.

In the present paper, a finite element code based on the microplane model for concrete is used for the analysis of typical mixed-mode geometries: a Single-Edge-Notched beam, a Double-Edge-Notched specimen and a Dowel-Disk specimen. A local smeared fracture finite element analysis is carried out. As a regularization procedure, the crack band method is used. The principal objective of the study was to investigate whether the smeared fracture finite element code is able to predict mixed-mode fracture of concrete with no optimisation of the material model parameters. Comparison between experimental and numerical results shows that the used code predicts structural response and crack patterns realistically for all cases investigated. Moreover, it is shown that for most of the Studied geometries a mixed-mode fracture mechanism dominates at crack initiation, however, with increase of the crack length mode-1 fracture becomes dominant and the specimens finally failed in mode-1 fracture.

Numerical study of mixed-mode fracture in concrete

Ozbolt, J. / Reinhardt, H.W.

In the present paper, a finite element code based on the microplane model for concrete is used for the analysis of typical mixed-mode geometries: a Single-Edge-Notched beam, a Double-Edge-Notched specimen and a Dowel-Disk specimen. A local smeared fracture finite element analysis is carried out. As a regularization procedure, the crack band method is used. The principal objective of the study was to investigate whether the smeared fracture finite element code is able to predict mixed-mode fracture of concrete with no optimisation of the material model parameters. Comparison between experimental and numerical results shows that the used code predicts structural response and crack patterns realistically for all cases investigated. Moreover, it is shown that for most of the Studied geometries a mixed-mode fracture mechanism dominates at crack initiation, however, with increase of the crack length mode-1 fracture becomes dominant and the specimens finally failed in mode-1 fracture.

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Title:

Numerical study of mixed-mode fracture in concrete

Contributors:

Ozbolt, J. (author) / Reinhardt, H.W. (author)

Published in:

International Journal of Fracture ; 118 ; 145-161

Publication date:

2002

Size:

17 Seiten, 27 Quellen

ISSN:

DOI:

https://doi.org/10.1023/A:1022886127806

Type of media:

Article (Journal)

Type of material:

Print

Language:

English

Keywords:

Sprödigkeit , Riss , Finite-Elemente-Methode , Bruchmechanik , Kerbschlagzähigkeit , Entfestigung , Zugfestigkeit , Young-Modul , Beton , numerisches Verfahren

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