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Threshold-driven fatigue damage and multi-scale fracture mechanisms of pre-cracked rocks under varying cyclic loading

delete2026-07-28
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PRE
AI
H
Haineng Shi
Z
Zhixiang Liu *
S
Shenghui Huang *
S
Shuangxia Zhang
DOI：10.1016/j.tafmec.2026.105844delete
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Abstract

Abstract

En 中文
• Multi-scale fatigue fracture of pre-cracked rock revealed by DIC, AE, and PFC2D. • Identifies 60% UCS as the threshold triggering a nonlinear energy dissipation surge. • Reveals tensile-to-mixed mode fracture transition under cyclic loading. • Intrinsic crack initiation stress dictates the onset of fatigue acceleration. • Force-chain buckling triggers a domino effect driving macroscopic shear banding.
Keywords:
Cyclic loading
Fractured rock
Mixed-mode fracture
Energy dissipation ratio
AE characteristics
Micromechanics

Journal

Theoretical and Applied Fracture Mechanics cover
Theoretical and Applied Fracture Mechanics
IF:
5.6
Papers:
4.4K
Citations:
1.3W

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