Uniaxial tensile behavior of aligned steel fibre reinforced cementitious composites

Qing, Longbang; Yu, Kelai; Mu, Ru; Forth, John

doi:10.1617/s11527-019-1374-5

Cited by 26 publications

(10 citation statements)

References 38 publications

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“…The B-nozzle increased the mean fiber orientation coefficient by approximately 31~39% and the fiber distribution coefficient by 3~23%. By comparing aligned steel fiber cementitious composites and plain cement composite with randomly distributed steel fibers, fiber alignment contributed better performance in terms of uniaxial tensile strength and post-cracking toughness as demonstrated by Qing et al [ 18 ]. Ma et al [ 19 ] proposed a printed cementitious material with a good fiber alignment.…”

Section: Introductionmentioning

confidence: 99%

Effect of Fiber Content and Alignment on the Mechanical Properties of 3D Printing Cementitious Composites

et al. 2021

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This paper studies aligned glass fiber-reinforced composites for printing. To determine the influence of fiber content and alignment on the mechanical properties of this novel material, a large number of standard test specimens were prepared, which included samples fabricated by mold-casting, randomly dispersed fiber reinforced mixtures and aligned fiber cement composites containing 10 types of fiber volume ratios manufactured by nozzle sizes ranging of 24 and 10 mm (fiber length = 12 mm). Mechanical properties and failure modes of the specimens under compression and flexural tests were studied experimentally. The anisotropic behaviors of printed samples were analyzed by different loading directions. As a result, the compressive and flexural strength of printed samples showed obvious anisotropy. With the increase of fiber volume ratio, flexural strength of the fiber reinforced composite was elevated tremendously but its compression strength reduced slightly. Moreover, fiber alignment also had a significant influence on the mechanical properties of the fiber reinforced composite. The composite cement-based material with 1 vol.-% aligned fiber exhibited an excellent flexural strength of 9.38 MPa, which increased by 483% in comparison to that of the plain cement paste.

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Section: Introductionmentioning

confidence: 99%

Effect of Fiber Content and Alignment on the Mechanical Properties of 3D Printing Cementitious Composites

et al. 2021

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“…In 1977, Miller and Björklund 17 pioneered the magnetic field method and utilized it for the first time to realize fiber alignment. Mu et al 22–25 prepared ASFRC specimens by electromagnetic field method and found that compared with SFRC, with the same fiber volume dosage, the tensile strength, flexural strength, and shear strength of ASFRC were increased by 30%–60%, 50%–900%, and 35%–45%, respectively. Qing et al 26 found that for ASFRC relative to that of random SFRC, the average efficiency of fracture parameters improved by 50%–80% in pre‐peak behavior and more than 100% in terms of post‐peak response.…”

Section: Introductionmentioning

confidence: 99%

Investigation on crack extension resistance curve of aligned steel fiber‐reinforced cement‐based composites

Qing

Zhang

et al. 2023

Fatigue Fract Eng Mat Struct

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In this study, an analytical method was proposed to predict the crack extension resistance curve (KR curve) of aligned steel fiber‐reinforced cement‐based composites (ASFRC). The three‐point bending tests were carried out on notched ASFRC specimens. Based on the predicted results, the influence of size effect and fiber dosage on KR curves of ASFRC specimens was discussed. Finally, the relationship between KR curves of ASFRC and steel fiber‐reinforced cement‐based composite (SFRC) specimens was investigated. The results show that the analytical results agree well with the experimental ones. The KR curve of ASFRC specimen has size effect and increases with fiber dosage. The ASFRC specimen shows a 30% improvement in the crack extension resistance at peak load over the SFRC specimen when the fiber volume dosage is 0.8%, and the improvement becomes more pronounced with increasing fiber dosage. When the KR curves of ASFRC and SFRC specimens are the same, the fiber consumption can be reduced by at least 40%.

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“…It is now widely accepted that the steel fibres mainly provide crack bridging and constraining capacity coming from the bonding between fibres and mortar matrix, the slip‐dependent friction, and the snubbing friction 22 . The slip‐dependent friction depends on the matrix strength, fibre length, fibre geometries, and interfacial bonding properties, while the snubbing friction is closely related to fibre geometries, fibre yielding strength, matrix strength, and especially the fibre inclination angle with respect to the crack surface 23,24 . The snubbing effect increases as the snubbing friction and is associated with matrix spalling at the pullout exit 23 .…”

Section: Introductionmentioning

confidence: 99%

A 3D cohesive‐frictional coupled interface model for mesoscale simulation of steel fibre‐reinforced concrete

Yang,

Zhang,

Wang

et al. 2023

Numerical Meth Engineering

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A 3D mesoscale finite element modelling approach is developed for simulating complicated damage and fracture behaviour in steel fibre‐reinforced concrete (SFRC) with explicit modelling of fibre–matrix interfaces. In this approach, a new 3D four‐noded cohesive‐frictional coupled interface element is developed to model the nonlinear interfacial bond‐slip behaviour, supplemented by a kinematic multiple‐point‐constraint (kMPC) algorithm to simulate the wrapping effect of the mortar around the fibres. They are implemented as a user‐defined element (UEL) and a user‐defined MPC subroutine in ABAQUS, respectively. Three cohesive‐frictional constitutive relationships are proposed to describe the nonlinear bond‐slip behaviour of different fibre–matrix compositions. The new approach is validated by single fibre pullout tests, direct tensile tests and three‐point bending tests of SFRC specimens with randomly distributed fibres. The results show that the new approach is capable of effectively capturing typical failure mechanisms in SFRC, such as fibre yielding, matrix failure, and fibre–matrix debonding and slipping.

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Uniaxial tensile behavior of aligned steel fibre reinforced cementitious composites

Cited by 26 publications

References 38 publications

Effect of Fiber Content and Alignment on the Mechanical Properties of 3D Printing Cementitious Composites

Effect of Fiber Content and Alignment on the Mechanical Properties of 3D Printing Cementitious Composites

Investigation on crack extension resistance curve of aligned steel fiber‐reinforced cement‐based composites

A 3D cohesive‐frictional coupled interface model for mesoscale simulation of steel fibre‐reinforced concrete

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