Evaluation of mixed mode I/II fracture toughness of C 50/60 from Brazilian disc test

Seitl, Stanislav; Miarka, Petr

doi:10.3221/igf-esis.42.13

Cited by 11 publications

(10 citation statements)

References 16 publications

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“…Gain knowledge of the introduced combination of ODM and DIC methods for evaluation of fracture mechanical properties will be used for future analysis: Estimation of fracture process zone in concrete Studies in Brazilian test that is used for combined mixed mode loads Determination of effective values of the SIF and thereby investigation of crack tip shielding mechanisms. …”

Section: Discussionmentioning

confidence: 99%

Williams' expansion‐based approximation of the displacement field in an Al 2024 compact tension specimen reconstructed from optical measurements

Seitl

Malíková

Ruzicka

et al. 2018

Fatigue Fract Eng Mat Struct

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A study on the approximation of the displacement field in the vicinity of a crack tip in a compact tension specimen made from Al 2024‐T351 is presented. Components of displacements vector are expressed using the linear elastic fracture mechanics theory via Williams' power series multi‐parameter formulation. Determination of the coefficients of the terms of this series is performed using a least squares‐based regression technique known as over deterministic method for which displacements data obtained experimentally via optical measurements are taken as inputs. The displacement fields reconstructed are discussed, and several conclusions are drawn regarding the number of the Williams' power series terms considered and the region where the displacement are investigated.

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Section: Discussionmentioning

confidence: 99%

Williams' expansion‐based approximation of the displacement field in an Al 2024 compact tension specimen reconstructed from optical measurements

Seitl

Malíková

Ruzicka

et al. 2018

Fatigue Fract Eng Mat Struct

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“…where P is the compressive load, a is the initial notch length, R is the radius of the disc (D/2), B is the disc's thickness, a is the inclination angle and Y I (a/R,a), Y II (a/R,a) are the dimensionless shape functions for mode I and mode II, respectively. The geometry functions Y I and Y II used in Equation (2) and (3) can be found in 7,9 . To calculate the T-stress, a direct extrapolation method 10 was used, for the polar angle q = 0°t he following Equation (4) was used:…”

Section: Brazilian Disc Test With a Central Notch (Bdcn)mentioning

confidence: 99%

“…This disadvantage leads to the development of the GMTS criterion. The GMTS criterion has been recently used with an accurate prediction of fracture resistance by Aliha et al for PMMA, 15 Seitl et al for concrete C 50/60 9,16 and Hou et al 17 for mortar and concrete.…”

Section: Gmts Criterionmentioning

confidence: 99%

Mixed-mode fracture analysis in high-performance concrete using a Brazilian disc test

Miarka¹,

Seitl²,

Bílek³

2019

Mater. Tehnol.

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This paper reports and discusses the results of an experimental investigation into the fracture mechanical properties of high-performance concrete (HPC) with a compressive strength higher than 100 MPa. In total, 6 specimens for a three-point bending test and 12 specimens of a Brazilian disc under a mixed-mode load were included in the experimental measurements. The fracture toughness was evaluated for mode I in the case of a three-point bend test and a Brazilian disc test, allowing a correlation between two geometrically different specimens. The fracture resistance under mixed mode I/II was analysed using the Brazilian disc test specimen with a central notch. To evaluate the fracture resistance under the mixed mode a generalised maximum tangential stress criterion was employed and the value of the critical distance rC is discussed as an appropriate HPC material characteristic. The last objective of this study was to provide some experimental data that can be useful in engineering practice for calibrating numerical constitutive models.Avtorji poro~ajo in razpravljajo o eksperimentalnih raziskavah lomno-mehanskih lastnosti visokokakovostnega betona (HPC; angl.: High Performance Concrete) s tla~no trdnostjo nad 100 MPa. V kompletu so izvedli trito~kovne upogibne preizkuse na {estih (6) vzorcih in na dvanajstih (12) vzorcih v obliki diskov so izvedli brazilski preizkus, ki predstavlja me{ano (natezno/tla~no) obremenitev. Dolo~ili so lomno`ilavost za na~in I v obeh primerih; to je trito~kovnega upogibnega preizkusa in brazilskega testa, upo{tevajo~geometrijske lastnosti obeh vrst vzorcev. Odpornost proti lomu v me{anem na~inu I/II so analizirali s pomo~jo brazilskega preizkusa na vzorcih (diskih) s centralno zarezo. Da bi ovrednotili odpornost proti lomu v me{anem na~inu, so uporabili posplo{eni kriterij maksimalne tangencialne napetosti in ocenili, da je vrednost kriti~ne razdalje primeren kriterij za oceno lastnosti HPC. V zadnjem delu te {tudije so podali nekaj eksperimentalnih podatkov, ki bi lahko bili uporabni v in`enirski praksi za kalibracijo numeri~nih konstitutivnih modelov.

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“…Brazilian disc test with a central notch (BDC) is specimen with circular cross section, made from the cylinder with a notch in the middle of specimen (see Figure 1a) [8][9][10]. The test performed on the BDC specimen is carried out under relatively simple experimental conditions (see Figure 1b), using only the testing press with sufficient load capacity.…”

Section: Brazilian Disc Testmentioning

confidence: 99%

“…Geometry functions YI and YII used in Equations (2) and (3) can be found in [8,9]. To calculate T-stress, a direct extrapolation method [13] is used, for polar angle θ = 0° the following equation is used:…”

Section: Brazilian Disc Testmentioning

confidence: 99%

Comparison of Fracture Resistance of the Normal and High Strength Concrete Evaluated by Brazilian Disc Test

Miarka

Seitl

Bílek

2018

The 18th International Conference on Experimental Mechanics

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Nowadays, high performance concrete is used more frequently because of the many advantages compared to traditional concrete. The higher mechanical properties (e.g., compressive strength, flexural strength, and Young's modulus) allow for larger spans and slender cross-sections. Despite the use of advanced material, standards for structural design do not fully use materials' potential. This can be minimized by using fracture mechanical properties in structural analysis. The fracture mechanical properties help to perform advanced structural analysis, especially when some of the structural elements have a crack. The load presence on the structure can be divided into tensile-mode I, shear-mode II, and combination of tension and shear-mixed mode I/II load. Therefore, it is necessary to perform test, which covers mixed mode loading conditions. One of the tests usually used for the evaluation of fracture resistance of concrete is Brazilian disc test. This contribution compares fracture resistance of two types of structural concrete (normal and high strength) under the mixed mode I/II. The generalized maximum tangential stress (GMTS) criterion was used for the evaluation of the fracture resistance.

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Evaluation of mixed mode I/II fracture toughness of C 50/60 from Brazilian disc test

Cited by 11 publications

References 16 publications

Williams' expansion‐based approximation of the displacement field in an Al 2024 compact tension specimen reconstructed from optical measurements

Williams' expansion‐based approximation of the displacement field in an Al 2024 compact tension specimen reconstructed from optical measurements

Mixed-mode fracture analysis in high-performance concrete using a Brazilian disc test

Comparison of Fracture Resistance of the Normal and High Strength Concrete Evaluated by Brazilian Disc Test

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