Investigation on mixed-mode II-III fracture of the sandstone by using eccentric cracked disk

Pan, Xin; Huang, Jiuzhou; Gan, Zhiqiang; Hua, Wen; Dong, Shiyun

doi:10.1016/j.tafmec.2021.103077

Cited by 13 publications

(2 citation statements)

References 30 publications

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“…All specimen cracks were found to have originated at the crack tip and spread outward toward the loading position. Other studies observe this type of cracking pattern[43]. None of the cracks rotated out of a plane, and the fracture surfaces were quite curved for the nonfbrous specimens at diferent loading angles (shown in Figures16(a)-16(g)).…”

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confidence: 61%

Research on Pure Modes I and II and Mixed-Mode (I/II) Fracture Toughness of Geopolymer Fiber-Reinforced Concrete

Karthik

Mohan

Murali

et al. 2023

Advances in Civil Engineering

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The unsustainable use of resources and the rising demand for traditional concrete have disrupted ecological equilibrium, necessitating the adoption of a more appropriate and long-lasting alternative. One such substitute for cement in concrete production is geopolymer concrete, although this material is prone to cracking and fracturing due to its low tensile strength, leading to costly repairs or even structural collapse. Fiber-reinforced concrete has recently been widely adopted as a construction material to counteract these issues. This research examined the crack proliferation and fracture toughness of geopolymer concrete comprising different fibers using a cracked Brazilian disc. Four different fibers were used, such as polypropylene and steel fiber (short and long), at a dosage of 1.5% by volume. Fracture toughness was computed for various modes (I, II, and I/II) of fractures, and crack propagation from cracked specimens was studied. A different angle of inclination (0, 15, 28, 83, 60, 75, and 90 degrees) was used to conduct the Brazilian disc test on the specimens with respect to the preexisting crack direction. The findings indicate that the increasing loading angle increased the load-carrying capacity. The fracture toughness values of specimens under all three modes ranged from 0.26 to 1.75 MPa.m1/2. Additionally, long polypropylene and steel fibers exhibit higher fracture toughness than short fibers.

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confidence: 61%

Research on Pure Modes I and II and Mixed-Mode (I/II) Fracture Toughness of Geopolymer Fiber-Reinforced Concrete

Karthik

Mohan

Murali

et al. 2023

Advances in Civil Engineering

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“…For the majority of engineering parts, the load pattern or direction is more likely to occur in a mixed direction than in just one direction. According to the nature of the load direction on that part, it must be studied in a mixed-mode fracture toughness; either it is studied in mixed-mode I/II [ 2 , 3 ], mixed-mode I/III [ 4 , 5 ], or mixed-mode II/III [ 6 , 7 ], with mixed-mode I/II loading being popularly studied in various research. The fracture toughness values under mixed-mode loading can be calculated under several methods such as actual testing, numerical method, etc.…”

Section: Introductionmentioning

confidence: 99%

Improvement of Mixed-Mode I/II Fracture Toughness Modeling Prediction Performance by Using a Multi-Fidelity Surrogate Model Based on Fracture Criteria

et al. 2022

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Today, artificial intelligence plays a huge role in the mechanical engineering field for solving many complex problems and the problem with fracture mechanics is one of them. In fracture mechanics, artificial intelligence is used to predict crack behavior under various conditions such as mixed-mode loading. Many parameters are used for explaining the crack behavior under various conditions, but those parameters are obtained from destructive testing, in which usually, only one data point is obtained from each test. An artificial problem method requires a large amount of data to train the model to be able to learn crack behavior, which is a disadvantage of applying this method to fracture mechanics. To eliminate the disadvantage of the large amount of experiment data required for modeling, in this study, the small data obtained from the experiment along with data obtained from fracture criteria that were used for elementary prediction of mixed mode fracture toughness were used to create an artificial intelligence model. Data from the experiment was combined with fracture criteria data using the multi-fidelity surrogate model that is described in this study. The mixed mode I/II fracture toughness of the PMMA material was tested in order to primarily propose the data combination technique. After the modeling process, the prediction results indicated that the performance of a model in which the actual test data was combined with the data from the fracture criteria (multi-fidelity surrogate model) was more predictively effective compared to only actual data-based modeling.

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Mechanical Properties and Damage Evolution Characteristics of Thermal Damage Basalt Under Triaxial Loading

Wang,

Song,

Liu

et al. 2023

Rock Mech Rock Eng

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Investigation on mixed-mode II-III fracture of the sandstone by using eccentric cracked disk

Cited by 13 publications

References 30 publications

Research on Pure Modes I and II and Mixed-Mode (I/II) Fracture Toughness of Geopolymer Fiber-Reinforced Concrete

Research on Pure Modes I and II and Mixed-Mode (I/II) Fracture Toughness of Geopolymer Fiber-Reinforced Concrete

Improvement of Mixed-Mode I/II Fracture Toughness Modeling Prediction Performance by Using a Multi-Fidelity Surrogate Model Based on Fracture Criteria

Mechanical Properties and Damage Evolution Characteristics of Thermal Damage Basalt Under Triaxial Loading

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