Mechanical and fractal characteristics of sandstone with Pre-existing fissures of different lengths under varying impact loads in SHPB tests

Du, Weihang; Zhang, Dongming; Yu, Beichen

doi:10.1016/j.tafmec.2023.103884

Cited by 12 publications

(3 citation statements)

References 35 publications

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“…Notably, there was a more extensive crushing area at the end in contact with the projectile rod. Importantly, the damage modes across all specimens did not exhibit a "T"-shaped three-piece split, consistent with findings in dynamic Brazilian disk splitting tests conducted on rock materials [49].…”

Section: Failure Modesupporting

confidence: 84%

“…extensive crushing area at the end in contact with the projectile rod. Importantly, the damage modes across all specimens did not exhibit a "T"-shaped three-piece split, consistent with findings in dynamic Brazilian disk splitting tests conducted on rock materials [49]. This study attributes the observed damage modes to the platforms at both ends of the specimen, which mitigate the stress concentration at the loaded contact end [50].…”

Section: Failure Modesupporting

confidence: 83%

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Effect of Expansion Agent and Glass Fiber on the Dynamic Splitting Tensile Properties of Seawater–Sea-Sand Concrete

Zhu,

Xiong,

Song

et al. 2024

Buildings

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In marine structural engineering, the impact resistance of concrete holds high significance. The determination of whether the combined use of expansion agent (EA) and glass fiber (GF) has a synergistic effect on the impact resistance of seawater–sea-sand concrete (SSC) and plays a role in its performance and application. In this study, the dynamic Brazilian disc test at various strain rates was carried out with an SHPB device to investigate the effect of mixing 0% and 6% EA with 0% and 1% GF on the dynamic splitting tensile properties of SSC. The results show that strain rate effect on EA and GF-reinforced SSC during dynamic splitting tensile tests at higher strain rates, indicating strong strain rate sensitivity. The synergistic reinforcement of EA and GF consumed more energy under impact loading, thus maintaining the morphological integrity of concrete. However, the dynamic splitting tensile strength obtained in the Brazilian disc test had a significant overload effect which cannot be ignored. EA doped at 6% and GF doped at 1% showed a synergistic enhancement of SSC’s dynamic splitting tensile properties.

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Section: Failure Modesupporting

confidence: 84%

Section: Failure Modesupporting

confidence: 83%

Effect of Expansion Agent and Glass Fiber on the Dynamic Splitting Tensile Properties of Seawater–Sea-Sand Concrete

Zhu,

Xiong,

Song

et al. 2024

Buildings

View full text Add to dashboard Cite

show abstract

“…Yang et al [7] tested single-cleavage granite specimens under uniaxial compression and found that the rock mechanical parameters were highly correlated with fissure angle and temperature. Du et al [8] studied the impact of crack length on sandstone's mechanical properties using the SHPB device under different impact air pressure conditions. The results of the study show that sandstone with the presence of fissures has an increased proportion of plastic deformation in the stress-strain curve.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Dynamic Mechanical Properties and Energy Dissipation of Water-Saturated Fissured Sandstone Specimens

Ping,

Sun,

et al. 2024

Applied Sciences

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To investigate the dynamic mechanical properties of water-saturated fissure rock at different strain rates, prefabricated sandstone specimens with a 45° dip angle were treated with water saturation and the impact compression test was performed with a Split Hopkinson Pressure Bar (SHPB) test device at different impact pressures. The results show that the clusters of dynamic stress–strain curves of water-saturated and natural sandstone specimens with a 45° dip angle of prefabricated fissures are basically similar under different impact air pressures. A distinct strain rate effect was observed for dynamic strain and dynamic compressive strength, both of which increased with increasing strain rate. From the failure pattern of the specimen, it can be seen that cracks appeared from the tip of the prefabricated fissure under axial stress, spreading to both ends and forming wing cracks and anti-wing cracks associated with shear cracks. As the strain rate increased, the energy dissipation density of the specimen gradually increased, and the macroscopic cracks cross-expanded with each other. The fracture form of the specimen showed a small block distribution, and the average particle size of the specimen gradually decreased. The specimen crushing energy dissipation density was negatively correlated with fracture size, reflecting a certain rate correlation. The sandstone fragments’ fractal dimension increases with the increase in crushing energy dissipation density, and the fractal dimension may be applied as a quantitative index to characterize sandstone crushing.

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Investigation of the dynamic compressive mechanical properties of concrete under the combined effects of freeze–thaw and salt erosion

Chen,

Ren,

Liu

et al. 2023

Construction and Building Materials

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Mechanical and fractal characteristics of sandstone with Pre-existing fissures of different lengths under varying impact loads in SHPB tests

Cited by 12 publications

References 35 publications

Effect of Expansion Agent and Glass Fiber on the Dynamic Splitting Tensile Properties of Seawater–Sea-Sand Concrete

Effect of Expansion Agent and Glass Fiber on the Dynamic Splitting Tensile Properties of Seawater–Sea-Sand Concrete

Analysis of the Dynamic Mechanical Properties and Energy Dissipation of Water-Saturated Fissured Sandstone Specimens

Investigation of the dynamic compressive mechanical properties of concrete under the combined effects of freeze–thaw and salt erosion

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