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June 12, 2026Scientific ReportsOpen Access

Study on the crack propagation mechanism of single cracks in red sandstone based on stress field evolution characteristics

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Authors

WZWenhua ZhaEast China University of TechnologyYCYichao CaoEast China University of TechnologyTXTao XuEast China University of Technology

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Implication

Randomized trial examines crack propagation in red sandstone, indicating implications for engineering stability assessments.

Key Points

  • The study aims to explore how the fracture dip angle affects the mechanical response and crack evolution in red sandstone.
  • Constructed a single-fracture sandstone model using discrete element software PFC2D.
  • Conducted uniaxial compression tests under varying fracture dip angles.
  • Integrated ‘stress field–microcrack’ coupling criterion with fracture initiation displacement characteristics.
  • Crack initiation stress increased from 11.5 MPa (α = 0°) to 25.0 MPa (α = 90°), a 117% increase.
  • Peak stress rose from 24.2 MPa to 33.6 MPa, a 39% increase.
  • Microcrack activity shifted from growth in the middle section to triggering at the fracture tip.

Cite This Study

Zha et al. (2026) studied this question.

synapsesocial.com/papers/6a2ba29a8101cf8926f01868https://doi.org/10.1038/s41598-026-56547-w
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