Crack propagation mechanism of single- and double-flawed rock specimens under tension–shear stress condition

Cen, Duofeng; Liu, Chang; Liu, Chao; Huang, Da

doi:10.1007/s12517-022-10065-x

Cited by 4 publications

(1 citation statement)

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“…The fracture process of rock samples already bearing flaws under uniaxial compression was simulated based on an improved smoothed particle hydrodynamics method (ISPH) [10]. The mechanisms governing the crack extension in both single-and double-cracked rocks under tensile and shear stress conditions were investigated with a combination of experimental observation and numerical simulation [11]. The mixed-mode fractures in rock-like materials were studied based on an extended peridynamic model equipped with a novel bond-breakage criterion [12].…”

Section: Introductionmentioning

confidence: 99%

Effects of Pore–Crack Relative Location on Crack Propagation in Porous Granite Based on the Phase-Field Regularized Cohesion Model

Zhang,

Shen

2023

Materials

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This study employs the phase-field regularized cohesion model (PF-CZM) to simulate crack propagation and damage behavior in porous granite. The impact of the pore radius (r), initial crack–pore distance (D), and pore–crack angle (θ) on crack propagation is investigated. The simulation findings reveal that, with a fixed deflection angle and initial crack–pore distance, larger pores are more likely to induce crack extension under identical loading conditions. Moreover, with r and θ remaining constant, the crack extension can be divided into two stages: from its initiation to the lower edge of the pore and then from the lower edge to the upper boundary of the model. Multiple combinations of different D/r ratios and pore radii are derived by varying the values of D and r. These results demonstrate that with a constant r, cracks tend to deflect towards the pore closer to the initial crack. Conversely, when D remains constant, cracks will preferentially deflect toward pores with a larger r. In summary, the numerical simulation of rock pores and initial cracks, based on the PF-CZM, exhibits remarkable predictive capabilities and holds significant potential in advancing rock fracture analyses.

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Section: Introductionmentioning

confidence: 99%