What question did this study set out to answer?

The aim is to investigate how hydraulic–stress coupling influences crack behavior in fractured rock.

Study on the Failure Characteristics and Crack Extension Mechanism of Cracked Rock Under Hydraulic–Stress Coupling Effect

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Examines crack evolution in fractured rock, highlighting hydraulic effects and implications for geo-energy projects.

The aim is to investigate how hydraulic–stress coupling influences crack behavior in fractured rock.
Utilized triaxial compression tests on sandstone specimens with various crack angles.
Employed a self-developed visualization device and an RTR-1500 system.
Applied different hydraulic pressures to assess effects on mechanical behavior.
Peak strength decreased as crack angle increased.
Hydraulic pressure likely enhances compressive strength by limiting microcrack formation.
Crack propagation shifted from tensile to tensile-shear mixed failure with increased hydraulic pressure.

WANG et al. (2026) studied this question.

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