Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Aggregate size effects on fracture behavior of concrete SCB specimens
https://orcid.org/0009-0006-5919-2782
https://orcid.org/0000-0002-0396-5057
Highlights Fracture toughness increases as aggregate size increases in modes I, II, and I-II. Highest and lowest fracture loads correspond to 0–19 mm and 0–5 mm aggregate sizes. Accuracy of different fracture criteria predictions depends on the aggregate size. Crack propagation angle decreases as the aggregate size increases.
Abstract Fracture in concrete and rock-like materials is the result of applying external loads, initiation, and propagation of the cracks, and finally, creating the failure surface in the material. The most common type of fractures in solid materials are usually formed under combined tensile/shear loading conditions. The stress intensity factors and , corresponding to opening and sliding modes (I and II), are the main fracture parameters, and their critical values (i.e., fracture toughness) show the material's resistance against the initiation and propagation of cracks. In this paper, the fracture toughness of concrete specimens is determined by considering different aggregate sizes and using the three-point bending test on semi-circular bend (SCB) specimen. The fracture toughness parameters have been determined by different fracture criteria and compared with the values obtained in the laboratory on concrete specimens. The effect of aggregate size on fracture parameters and crack propagation path has been evaluated. To predict thecrack initiation angle and fracture toughness values, themodified maximum tangential stress (MMTS) and extended maximum tangential strain (EMTSN) criteria along with conventional fracture criteriawere used. The results showed, that with the increase in aggregate size, the fracture toughness value under mode I, II, and mixed-mode (I-II) has increased. The laboratory results showed that specimens with aggregate sizes of 0–19 mm have the highest fracture load, and specimens with the aggregate sizes of 0–5 mm have the lowest fracture load
Aggregate size effects on fracture behavior of concrete SCB specimens
https://orcid.org/0009-0006-5919-2782
https://orcid.org/0000-0002-0396-5057
Highlights Fracture toughness increases as aggregate size increases in modes I, II, and I-II. Highest and lowest fracture loads correspond to 0–19 mm and 0–5 mm aggregate sizes. Accuracy of different fracture criteria predictions depends on the aggregate size. Crack propagation angle decreases as the aggregate size increases.
Abstract Fracture in concrete and rock-like materials is the result of applying external loads, initiation, and propagation of the cracks, and finally, creating the failure surface in the material. The most common type of fractures in solid materials are usually formed under combined tensile/shear loading conditions. The stress intensity factors and , corresponding to opening and sliding modes (I and II), are the main fracture parameters, and their critical values (i.e., fracture toughness) show the material's resistance against the initiation and propagation of cracks. In this paper, the fracture toughness of concrete specimens is determined by considering different aggregate sizes and using the three-point bending test on semi-circular bend (SCB) specimen. The fracture toughness parameters have been determined by different fracture criteria and compared with the values obtained in the laboratory on concrete specimens. The effect of aggregate size on fracture parameters and crack propagation path has been evaluated. To predict thecrack initiation angle and fracture toughness values, themodified maximum tangential stress (MMTS) and extended maximum tangential strain (EMTSN) criteria along with conventional fracture criteriawere used. The results showed, that with the increase in aggregate size, the fracture toughness value under mode I, II, and mixed-mode (I-II) has increased. The laboratory results showed that specimens with aggregate sizes of 0–19 mm have the highest fracture load, and specimens with the aggregate sizes of 0–5 mm have the lowest fracture load
Aggregate size effects on fracture behavior of concrete SCB specimens
https://orcid.org/0009-0006-5919-2782
https://orcid.org/0000-0002-0396-5057
Highlights Fracture toughness increases as aggregate size increases in modes I, II, and I-II. Highest and lowest fracture loads correspond to 0–19 mm and 0–5 mm aggregate sizes. Accuracy of different fracture criteria predictions depends on the aggregate size. Crack propagation angle decreases as the aggregate size increases.
Abstract Fracture in concrete and rock-like materials is the result of applying external loads, initiation, and propagation of the cracks, and finally, creating the failure surface in the material. The most common type of fractures in solid materials are usually formed under combined tensile/shear loading conditions. The stress intensity factors and , corresponding to opening and sliding modes (I and II), are the main fracture parameters, and their critical values (i.e., fracture toughness) show the material's resistance against the initiation and propagation of cracks. In this paper, the fracture toughness of concrete specimens is determined by considering different aggregate sizes and using the three-point bending test on semi-circular bend (SCB) specimen. The fracture toughness parameters have been determined by different fracture criteria and compared with the values obtained in the laboratory on concrete specimens. The effect of aggregate size on fracture parameters and crack propagation path has been evaluated. To predict thecrack initiation angle and fracture toughness values, themodified maximum tangential stress (MMTS) and extended maximum tangential strain (EMTSN) criteria along with conventional fracture criteriawere used. The results showed, that with the increase in aggregate size, the fracture toughness value under mode I, II, and mixed-mode (I-II) has increased. The laboratory results showed that specimens with aggregate sizes of 0–19 mm have the highest fracture load, and specimens with the aggregate sizes of 0–5 mm have the lowest fracture load
Aggregate size effects on fracture behavior of concrete SCB specimens
Afshar, Rashid (Autor:in) / Faramarzi, Lohrasb (Autor:in) / Mirsayar, Mirmilad (Autor:in) / Ebrahimi, Behnam J. (Autor:in)
30.04.2023
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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