Computational modeling of fiber flow during casting of fresh concrete

Gudžulić, Vladislav; Dang, Thai Son; Meschke, Günther

doi:10.1007/s00466-018-1639-9

Cited by 24 publications

(23 citation statements)

References 53 publications

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“…Numerical flow simulation provides an alternative approach for predicting the fiber geometry of UHPFRC samples for given production parameters 27,28 . Simulation based approaches can reduce the effort of such investigations compared to the production, characterization and testing of large amounts of concrete samples.…”

Section: Resultsmentioning

confidence: 99%

Influence of production parameters on the fiber geometry and the mechanical behavior of ultra high performance fiber‐reinforced concrete

Maryamh

Hauch

Redenbach

et al. 2020

Structural Concrete

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In this paper, the relationship between production parameters of ultra high performance fiber‐reinforced concrete (UHPFRC) and the spatial distribution and orientation of the steel fibers is investigated. UHPFRC specimens with varying fiber diameter, fiber volume fraction, and rheology of the mixture are produced. Additionally, casting is performed from the side or the middle of the formwork. Imaging by micro computed tomography allows for a statistical analysis of the spatial arrangement of the fibers in the test specimens. The flexural behavior and the load capacity of the specimens are analyzed by four point bending tests. The results of the bending tests are well explained by characteristics of the fiber systems determined from the image data.

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Section: Resultsmentioning

confidence: 99%

Influence of production parameters on the fiber geometry and the mechanical behavior of ultra high performance fiber‐reinforced concrete

Maryamh

Hauch

Redenbach

et al. 2020

Structural Concrete

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“…The results of the sensitivity analysis can be used to efficiently reduce the variance of SFRC beams' flexural behavior, by reducing the variance of the material properties with high Sobol' indices. For example, the variance of SFRC's residual tensile strength, primarily caused by the random dispersion of fibers, can be reduced using casting procedures that lead to a more predictive distribution of fibers in the structural element (e.g., horizontal instead of vertical casting), by increasing the fiber content [6] or using advanced computational models to simulate the position and orientation of fibers in an SFRC element, reducing the uncertainty in the distribution of steel fibers along the structural element [43]. Furthermore, the results can help in understanding how changing the values of certain material properties will affect the flexural behavior of the SFRC beam.…”

Section: Discussionmentioning

confidence: 99%

Flexural Behavior of Steel Fiber Reinforced Concrete Beams: Probabilistic Numerical Modeling and Sensitivity Analysis

Blagojević

Kukaras

2021

Applied Sciences

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One of the principle issues concerning the practical application of steel fiber reinforced concrete (SFRC) is the uncertainty related to its structural behavior, primarily caused by the partially random distribution and orientation of steel fibers in SFRC structural elements. This paper aims to provide a better understanding of how the variance of material properties of the SFRC affects the flexural behavior of SFRC beams. First, a distributed plasticity fiber finite element model of beam flexural behavior is proposed and validated. Then, probability distributions of selected material properties are defined based on existing probabilistic models and experimental results from the literature. Finally, a variance-based sensitivity analysis is performed using Sobol’ indices to identify uncertainties in material properties that contribute most to the uncertainties related to three characteristic points of a beam’s flexural behavior: first crack, yield, and collapse point. Sensitivity analysis is performed by surrogating the numerical model using polynomial chaos expansion. The variance in residual tensile strength is identified as the main contributor to the variance in the flexural behavior of an SFRC beam used in the case study.

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“…The technical and economic benefits from fiber reinforcement may be mobilized for the development of innovative and sustainable FRC structural systems. However, due to the aforementioned complex phenomena, design should be executed by using computational models of high sophistication at the level of computational mechanics and at the approaches that simulate the behavior of the constituent materials from the fresh 32 up to the hardened stage of the FRC. 33 Commercial software (C_S) based on the finite element method (FEM) has been used for the simulation of the nonlinear material behavior of FRC structures, as the contribution of fiber reinforcement is mainly activated after the fibers have been crossed by cracks.…”

Section: Numerical Approaches For Modeling the Behavior Of Frc Structuresmentioning

confidence: 99%

Blind competition on the numerical simulation of steel‐fiber‐reinforced concrete beams failing in shear

Barros

Sanz

Kabele

et al. 2020

Structural Concrete

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Experimental research has shown the extraordinary potential of the addition of short fibers to cement-based materials by improving significantly the behavior of concrete structures for serviceability and ultimate limit states. Software based on the finite element method has been used for the simulation of the material nonlinear behavior of fiber-reinforced concrete (FRC) structures. The applicability of the existing approaches has often been assessed by simulating experimental tests with structural elements, in general of a small scale, where the parameter values of the material constitutive laws are adjusted for the aimed predicting level, which constitutes an inverse technique of arguable Discussion on this paper must be submitted within two months of the print publication. The discussion will then be published in print, along with the authors' closure, if any, approximately nine months after the print publication.

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Computational modeling of fiber flow during casting of fresh concrete

Cited by 24 publications

References 53 publications

Influence of production parameters on the fiber geometry and the mechanical behavior of ultra high performance fiber‐reinforced concrete

Influence of production parameters on the fiber geometry and the mechanical behavior of ultra high performance fiber‐reinforced concrete

Flexural Behavior of Steel Fiber Reinforced Concrete Beams: Probabilistic Numerical Modeling and Sensitivity Analysis

Blind competition on the numerical simulation of steel‐fiber‐reinforced concrete beams failing in shear

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