Numerical simulation of the casting process of steel fiber reinforced self-compacting concrete: Influence of material and casting parameters on fiber orientation and distribution

Zhao, Yun; Bi, Jia; Wang, Zhaoyao; Huo, Linying; Guan, Jian; Zhao, Yazan; Sun, Yongtao

doi:10.1016/j.conbuildmat.2021.125337

Cited by 21 publications

(8 citation statements)

References 52 publications

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“…The composite casting process uses chromite ore sand with stronger heat storage capacity for the thicker side, and uses the quartz sand with stronger heat storage capacity for the thickest side, so the solidification time of all sides of the casting is about 300 s, almost achieving simultaneous solidification [18,4].…”

Section: Numerical Simulation Of Temperature Field During Solidificat...mentioning

confidence: 99%

Numerical Simulation and Optimal Control of Composite Nonlinear Mechanical Parts Casting Process

Li,

Wang

2024

SCPE

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In order to understand the numerical simulation and optimal control of the casting process of Machine element, the author proposed a study based on the numerical simulation and optimal control of the casting process of composite Machine element. Firstly, the author analyzed the structural characteristics of composite Machine element, introduced them in detail, and studied their casting technology in combination with the actual situation. Secondly, the casting process of composite Machine element was simulated by using numerical simulation method, and the temperature field and flow field in the casting filling and solidification process were analyzed. Finally, selecting square cylinders with different wall thicknesses as typical components, the scheme design of traditional single casting process and multi material composite casting process based on dieless casting composite forming technology were carried out. Finite element numerical simulation and experimental research were conducted on the two processes, respectively. The results indicate that: The casting obtained by the multi material composite casting process almost solidifies simultaneously around 200 seconds later, and the graphite morphology around the casting is Type A, with a length of about 100 um, with small differences and uniform distribution; The minimum difference in tensile strength around the casting is about 3.8%, and the maximum increase in tensile strength value is 21%. This research achievement can provide technical reference for high-performance and high-quality casting of complex iron castings. In order to improve the casting quality, the author optimized the casting process of composite Machine element by numerical simulation.

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Section: Numerical Simulation Of Temperature Field During Solidificat...mentioning

confidence: 99%

Numerical Simulation and Optimal Control of Composite Nonlinear Mechanical Parts Casting Process

Li,

Wang

2024

SCPE

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“…The modulus of elasticity of reinforced concrete depends to a large extent on the orientation of the fibres; the more the fibres are aligned with the direction of stresses, the lower the tensile elastic limit [ 24 ]. The residual strength (strength once cracking occurs), which governs the bending strength capacity, also depends on the angle of inclination of the fibres, so that the smaller the angle, the higher the bending strength [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

“…It has been shown that the change in fibre orientation and fibre distribution is highly dependent on the length and height of the formwork [ 24 ]. Studies conclude that fibres align as a result of the formwork wall effect [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

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Statistical Analysis of the Pouring Method’s Influence on the Distribution of Metallic Macrofibres into Vibrated Concrete

Gonzalez¹,

Sainz-Aja

Gaute-Alonso³

et al. 2023

Materials

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The use of fibre-reinforced concrete (FRC) in structural applications is increasing significantly as a result of (1) the acceptance of this composite into design guidelines and (2) the improvement in terms of sustainability performance that has been reported for cases where FRC has been used. In this context, fibre orientation and distribution are factors that govern the post-cracking response of the FRC. Researchers have already dealt with the analysis of both variables from an experimental and numerical perspective, and design-oriented recommendations were included in existing design guidelines (i.e., fib Model Code 2020). Nonetheless, there are still technical aspects to be answered within a research framework before the influence of these variables on the mechanical response of FRC could be covered with sufficient reliability. In this regard, this research is aimed at shedding light on the influence of the mould geometry and concrete pouring/vibration procedures on the fibre orientation and distribution variables as well as on the post-cracking performance of the FRC. An extensive experimental programme aimed at characterising these variables using novel testing techniques (i.e., an inductive non-destructive approach for quantifying fibre amount and orientation and the BCN test for assessing the pre- and post-cracking responses of the FRC) was carried out for this purpose. A relationship has been found between the shape of the formwork and the direction of pouring, along with the direction and distribution of the fibres, both of which proved to have an influence on the residual tensile strength of the concrete. However, it has been confirmed that the first crack resistance depends on the concrete matrix, with the addition of fibres having no relevant influence on that mechanical parameter. The results and conclusions derived from this experimental programme can be extended to FRCs and boundary conditions similar to those established herein.

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“…In 3D printing applications, fibre orientation also plays a key role [ 12 , 13 , 14 , 15 ]. Many methods can be used to achieve fibre orientation, notably the casting technique of fresh concrete [ 16 , 17 , 18 ]. In the case of steel fibres, magnetic field orientation can be used.…”

Section: Introductionmentioning

confidence: 99%

Simulations of the Behaviour of Steel Ferromagnetic Fibres Commonly Used in Concrete in a Magnetic Field

et al. 2021

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The efficiency of fibre reinforcement in concrete can be drastically increased by orienting the fibres using a magnetic field. This orientation occurs immediately after pouring fresh concrete when the fibres can still move. The technique is most relevant for manufacturing prefabricated elements such as beams or columns. However, the parameters of such a field are not immediately apparent, as they depend on the specific fibre reaction to the magnetic field. In this study, a numerical model was created in ANSYS Maxwell to examine the mechanical torque acting on fibres placed in a magnetic field with varying parameters. The model consists of a single fibre placed between two Helmholtz coils. The simulations were verified with an experimental setup as well as theoretical relationships. Ten different fibre types, both straight and hook-ended, were examined. The developed model can be successfully used to study the behaviour of fibres in a magnetic field. The fibre size plays the most important role together with the magnetic saturation of the fibre material. Multiple fibres show significant interactions.

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Numerical simulation of the casting process of steel fiber reinforced self-compacting concrete: Influence of material and casting parameters on fiber orientation and distribution

Cited by 21 publications

References 52 publications

Numerical Simulation and Optimal Control of Composite Nonlinear Mechanical Parts Casting Process

Numerical Simulation and Optimal Control of Composite Nonlinear Mechanical Parts Casting Process

Statistical Analysis of the Pouring Method’s Influence on the Distribution of Metallic Macrofibres into Vibrated Concrete

Simulations of the Behaviour of Steel Ferromagnetic Fibres Commonly Used in Concrete in a Magnetic Field

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