Finite Element Modeling of Concrete Fracture in Tension with the Brazilian Splitting Test on the Case of Plane-stress and Plane-strain

Indriyantho, Bobby Rio; Nuroji,

doi:10.1016/j.proeng.2014.12.185

Cited by 18 publications

(12 citation statements)

References 9 publications

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“…Stress profiles in the y direction were very similar for all three breakage modes: the stress was tensile in the central part of the disc and compressive in locations close to the loading platens. The shape of this stress profile was consistent with the findings of experimental [23], theoretical [22], finite element [52], and DEM [43] studies. These studies have indicated the domination of the tension stress in locations close to centre of the disc, which results in cracking, and domination of the compressive stress in locations close to the loading platens, which results in crushing.…”

Section: Breakage Modessupporting

confidence: 86%

Discrete Element Method Modelling of the Diametral Compression of Starch Agglomerates

et al. 2020

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Starch agglomerates are widely applied in the pharmaceutical, agricultural, and food industries. The formation of potato starch tablets and their diametral compression were simulated numerically and verified in a laboratory experiment to analyse the microscopic mechanisms of the compaction and the origins of their breakage strength. Discrete element method (DEM) simulations were performed using EDEM software. Samples comprised of 120,000 spherical particles with radii normally distributed in the range of 5–36 μm were compacted in a cylindrical die with a diameter of 2.5 cm. The linear elastic–plastic constitutive contact model with a parallel bonded-particle model (BPM) was used to model the diametral compression. DEM simulations indicated that the BPM, together with the linear elastic–plastic contact model, could describe the brittle, semi-brittle, or ductile breakage mode, depending on the ratio of the strength to Young’s modulus of the bond and the bond-to-contact elasticity ratio. Experiments confirmed the findings of the DEM simulations and indicated that potato starch (PS) agglomerates can behave as a brittle, semi-brittle, or ductile material, depending on the applied binder. The PS agglomerates without any additives behaved as a semi-brittle material. The addition of 5% of ground sugar resulted in the brittle breakage mode. The addition of 5% gluten resulted in the ductile breakage mode.

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Section: Breakage Modessupporting

confidence: 86%

Discrete Element Method Modelling of the Diametral Compression of Starch Agglomerates

et al. 2020

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“…where (14) and (15) into Equation 1and considering that z = x + iy, α + β = 90°, the stress solution for the chordwise loading is obtained as follows:…”

Section: Advances In Mathematical Physicsmentioning

confidence: 99%

“…From the current research results, tensile strength measured by a splitting test is still quite discrete and is affected by many factors, such as the thickness of disc specimen, the contact mode of the load, and the size of the spacer. For example, aiming at the size effect [14][15][16][17] caused by the thickness to diameter ratio, the result shows that the tensile stress on the axle wire of the disc is not a constant but a high-end, low-middle distribution, with an obvious spatial effect. At the same time, the compression failure near the loading point of the disc violates the hypothesis of the initiation of the crack from the center of the disc due to the strong stress concentration.…”

Section: Introductionmentioning

confidence: 99%

Deviation Effect of Coaxiality on the Rock Brazilian Split

Zhao

Zhang

et al. 2020

Advances in Mathematical Physics

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Tension failure is one of the main forms of instability in geotechnical engineering. Aiming at the calculation error caused by the loading direction deviation of the Brazilian disc splitting method, a mechanical model of a disc under chord loading was constructed firstly. Based on the theory of complex variable function, the analytic solutions of stresses in a circular disc were deduced, and the calculation error of the tensile strength under chord loading was characterized by defining the error impact rate. And the stress distribution of a disc and the law of rock fracture under chord loading were detailed analyzed through numerical calculation. Through numerical calculation, the stress distribution of the disc and rock failure law under chordwise loading are discussed in detail. The results show that the stress concentration near the loading point is stronger under the chordwise loading comparing with the radial loading, which makes the disc more vulnerable to produce compression failure near the loading point. The disc exhibits a maximum tensile stress and a minimum compressive stress at the intersection of the loaded string and the horizontal diameter, so that tensile rupture damage is likely to occur here. With the increase of deviation angle, the tensile strength measured by the Brazilian splitting test decreases gradually, and the influence rate of error increases significantly. The proposed analytical solution under chord loading provides theoretical guiding significance for nonradial splitting failure of a disc.

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“…is technique provides a practical and less expensive alternative test compared to the direct tensile test [4,5]. Unlike the classical uniaxial test, it is not necessary to attach the specimen ends to the loading device, thereby avoiding premature failure during the test setup [6,7]. In the Brazilian test, a circular disk sample extracted from the material is diametrically compressed until the transverse stress normal to the loading diameter causes specimen failure.…”

Section: Introductionmentioning

confidence: 99%

“…e results from several research studies performed to date show that the finite element method (FEM) can effectively recreate the indirect test in its different configurations (flat pattern, loading arc, and classical Brazilian). Indriyantho and Nuroji [6] developed a finite element programme that is able to accurately reproduce the load-displacement curves of the concrete under the Brazilian test.…”

Section: Introductionmentioning

confidence: 99%

A Novel Analytical Solution for the Brazilian Test with Loading Arcs

Gutiérrez-Moizant

Ramírez-Berasategui

Santos-Cuadros

et al. 2020

Mathematical Problems in Engineering

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This research study presents a new theoretical model to calculate the indirect tensile strength for the Brazilian disk with loading arcs, based on numerical simulations, two-dimensional elasticity theory, and Griffith failure criterion. The new expression incorporates a no uniform contact pressure distribution determined by the results of the simulations with the finite element method. A computational experiment design has been developed to test the accuracy of the predictions made with the proposed model. This study demonstrates that the stresses predicted with the new model are closer to those determined by the finite element models than other theoretical solutions available in the literature. Additionally, a comparative analysis with experimental results obtained by other authors also indicates that the new model provides a more accurate magnitude of the indirect tensile strength.

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Finite Element Modeling of Concrete Fracture in Tension with the Brazilian Splitting Test on the Case of Plane-stress and Plane-strain

Cited by 18 publications

References 9 publications

Discrete Element Method Modelling of the Diametral Compression of Starch Agglomerates

Discrete Element Method Modelling of the Diametral Compression of Starch Agglomerates

Deviation Effect of Coaxiality on the Rock Brazilian Split

A Novel Analytical Solution for the Brazilian Test with Loading Arcs

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