Mode I and Mode II Granite Fractures after Distinct Thermal Shock Treatments

Li, Xiang; Zhang, Zhuoyao; Chen, Wei; Yin, Tubing

doi:10.1061/(asce)mt.1943-5533.0002627

Cited by 39 publications

(2 citation statements)

References 45 publications

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“…Literature data were collected from various references such that different rock types, i.e., soft and hard, and core K IC test methods can be represented. In the literature data, rocks from different countries were considered such as China [6,19,[50][51][52][53][54], UK [18], Australia [55,56], Japan [57,58], USA [59], Canada [59] and Turkey [10,60,61]. Static and level I testing conditions were considered in this study because they are the most common and simplest conditions for K IC testing.…”

Section: Methodsmentioning

confidence: 99%

Study of the Relationship between Mode I Fracture Toughness and Rock Brittleness Indices

Ameen,

Elwageeh,

Abdelaziz

et al. 2023

Applied Sciences

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Mode I fracture toughness (KIC) and rock brittleness are important properties that influence many rock engineering applications. Due to the difficulties in determining KIC experimentally, previous studies have investigated the relationship between KIC and rock brittleness indices. However, only rock brittleness indices (based on strength parameters) and KIC obtained from Chevron Bend and Short Rod test methods were considered. In this paper, regression analysis was carried out to investigate the relationship between KIC and rock brittleness using literature data collected from different rock types and core KIC test methods under level I and static test conditions. Rock brittleness was assessed using ten indices based on strength and pre-peak elastic parameters. The results showed that elastic-based indices were not good predictors of KIC, while strength-based indices correlated well with KIC. A comparison with previous studies revealed that the correlations between KIC and strength-based indices were significantly sensitive to the rock type, i.e., soft or hard, and the KIC test method. However, a brittleness index, based on both strength and pre-peak elastic parameters, was found to be the best index to predict KIC because of its lower sensitivity to the test method and rock type.

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Section: Methodsmentioning

confidence: 99%

Study of the Relationship between Mode I Fracture Toughness and Rock Brittleness Indices

Ameen,

Elwageeh,

Abdelaziz

et al. 2023

Applied Sciences

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show abstract

“…Their results showed that the index properties of rocks after repeated TS decrease in varying levels with respect to initial values. Li et al [30] investigated the effects of TS on the mechanical responses of granite through Brazilian tests on the cracked straight through Brazilian disc (CSTBD) under Mode I and Mode II loading. Their results indicated that the peak load values and the Mode I and Mode II fracture toughness for water-cooled specimens are lower than those for air-cooled specimens.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Properties of Thermal Shock Treated Sandstone Subjected to Coupled Dynamic and Static Loads

Huang

Yin

et al. 2021

Minerals

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In deep rock engineering, the rock mass can be subjected to thermal stress caused by sudden changes in temperature, which is referred to as thermal shock (TS). To study the effect of TS on heated sandstone, three cooling methods are used to provide different cooling rates. Then the coupled dynamic and static loading tests are carried out on the heated sandstone by means of a modified split Hopkinson pressure bar (SHPB) system. The test results show that as the heating level increases, the dry density, P-wave velocity, and the dynamic combined strength of the heated sandstone decrease, while specimen porosity increases. Particularly, a sharp change in the physical properties of sandstone can be observed at 650 °C, which is believed to be caused by the α-β transition of quartz at 573 °C. At each heating level of the test, the damage caused by the higher cooling rate to the heated sandstone is more than that caused by the lower cooling rate. The different failure modes of sandstone with increasing temperature are analyzed. The mechanism of TS acting on heated sandstone is discussed, and two typical fracture patterns reflecting the action of TS are identified through SEM.

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Mode-I Fracture Toughness and Fracturing Damage Model for Sandstone Subjected to Cryogenic Treatment to − 160 °C

Zhang,

Gu,

2024

Rock Mech Rock Eng

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Mode I and Mode II Granite Fractures after Distinct Thermal Shock Treatments

Cited by 39 publications

References 45 publications

Study of the Relationship between Mode I Fracture Toughness and Rock Brittleness Indices

Study of the Relationship between Mode I Fracture Toughness and Rock Brittleness Indices

Dynamic Properties of Thermal Shock Treated Sandstone Subjected to Coupled Dynamic and Static Loads

Mode-I Fracture Toughness and Fracturing Damage Model for Sandstone Subjected to Cryogenic Treatment to − 160 °C

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