Effect of Cyclic Loading on Mode I Fracture Toughness of Granite under Real-Time High-Temperature Conditions DOI Creative Commons
Fei Lv, Fan Zhang,

Subiao Zhang

et al.

Applied Sciences, Journal Year: 2024, Volume and Issue: 14(2), P. 755 - 755

Published: Jan. 16, 2024

Under hot dry rock development, formations undergo the combined challenges of cyclic loading and high temperatures, stemming from various sources such as hydraulic fracturing mechanical excavation. Therefore, a fundamental understanding how rocks fracture under these demanding conditions is for technology. To this end, series three-point bending tests were conducted on granite samples. These entailed exposing samples to varying real-time high-temperature environments, ranging 25 °C 400 °C. Furthermore, different upper load limits (75%, 80%, 85%, 90% peak load) obtained in monotonic used explore behavior conditions. The analysis encompassed study load–displacement curves, elastic stiffness, mode I toughness In addition, microscopic features surface examined using scanning electron microscope (SEM). findings revealed notable patterns granite. Cumulative vertical displacement increased with growing number cycles, especially at °C, 200 300 This exhibited unique trend, initially decreasing before subsequently rising cycle count increased. Additionally, critical damage threshold gradual decline temperature rose. As ascended typically ranged between 80% 85% load. At declined approximately 75–80% load, it fell below 75% Within we noted significant increase incidence cracks, crystal microfracture zones, dislodging mineral particles within cycles

Language: Английский

Effect of Cyclic Loading on Mode I Fracture Toughness of Granite under Real-Time High-Temperature Conditions DOI Creative Commons
Fei Lv, Fan Zhang,

Subiao Zhang

et al.

Applied Sciences, Journal Year: 2024, Volume and Issue: 14(2), P. 755 - 755

Published: Jan. 16, 2024

Under hot dry rock development, formations undergo the combined challenges of cyclic loading and high temperatures, stemming from various sources such as hydraulic fracturing mechanical excavation. Therefore, a fundamental understanding how rocks fracture under these demanding conditions is for technology. To this end, series three-point bending tests were conducted on granite samples. These entailed exposing samples to varying real-time high-temperature environments, ranging 25 °C 400 °C. Furthermore, different upper load limits (75%, 80%, 85%, 90% peak load) obtained in monotonic used explore behavior conditions. The analysis encompassed study load–displacement curves, elastic stiffness, mode I toughness In addition, microscopic features surface examined using scanning electron microscope (SEM). findings revealed notable patterns granite. Cumulative vertical displacement increased with growing number cycles, especially at °C, 200 300 This exhibited unique trend, initially decreasing before subsequently rising cycle count increased. Additionally, critical damage threshold gradual decline temperature rose. As ascended typically ranged between 80% 85% load. At declined approximately 75–80% load, it fell below 75% Within we noted significant increase incidence cracks, crystal microfracture zones, dislodging mineral particles within cycles

Language: Английский

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