Mechanical and Failure Behavior of Soft-Hard Composite Rock with Three Parallel Joints Under Uniaxial Loading: Insights Based on AE and DIC Techniques DOI Open Access
Chaoyi Yang, Su Li, Xinglong Feng

et al.

Materials, Journal Year: 2025, Volume and Issue: 18(5), P. 1088 - 1088

Published: Feb. 28, 2025

Jointed soft-hard composite rocks are frequently encountered in nature, and this complex structure contributes to unpredictable fracturing mechanisms failure behavior. In study, with three joints were fabricated conduct a uniaxial loading experiment, supplemented by Digital Image Correlation (DIC) Acoustic Emission (AE) experiments. The results indicate that the mechanical parameters display V-shape variation trend increase of joint angle, which minimized at 30°. peak strength ranges from 33.48 MPa 44.93 MPa. characteristics change tensile shear finally intact failure. According displacement curves on both sides crack, initiation wing cracks is driven direct field indirect for specimens angles 0-30° 75-90°, respectively. While crack tips corresponding angle 45-60° controlled fields. Wherein initiate coplanar hard layer, field, expanding upward other more susceptible field.

Language: Английский

Mechanical and Failure Behavior of Soft-Hard Composite Rock with Three Parallel Joints Under Uniaxial Loading: Insights Based on AE and DIC Techniques DOI Open Access
Chaoyi Yang, Su Li, Xinglong Feng

et al.

Materials, Journal Year: 2025, Volume and Issue: 18(5), P. 1088 - 1088

Published: Feb. 28, 2025

Jointed soft-hard composite rocks are frequently encountered in nature, and this complex structure contributes to unpredictable fracturing mechanisms failure behavior. In study, with three joints were fabricated conduct a uniaxial loading experiment, supplemented by Digital Image Correlation (DIC) Acoustic Emission (AE) experiments. The results indicate that the mechanical parameters display V-shape variation trend increase of joint angle, which minimized at 30°. peak strength ranges from 33.48 MPa 44.93 MPa. characteristics change tensile shear finally intact failure. According displacement curves on both sides crack, initiation wing cracks is driven direct field indirect for specimens angles 0-30° 75-90°, respectively. While crack tips corresponding angle 45-60° controlled fields. Wherein initiate coplanar hard layer, field, expanding upward other more susceptible field.

Language: Английский

Citations

0