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July 10, 2026Geomechanics and Geophysics for Geo-Energy and Geo-ResourcesOpen Access

Systematic investigation on true-triaxial mechanical behavior of sandstone across brittle-ductile regime

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Authors

JLJiacun LiuCZChi ZhangJXJunjie Xiao

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Overview

Quantitative analysis investigates strength and deformation in sandstone, indicating new insights for underground engineering.

Key Points

  • The study aims to analyze the strength, failure, and deformation characteristics of sandstone under true-triaxial stress conditions.
  • Conducted true-triaxial tests on green sandstone following a common loading path.
  • Proposed a Matsuoka-Nakai-Mohr–Coulomb strength model validated with various sandstone types.
  • Classified stress-strain behavior into distinct categories based on observed characteristics.
  • Strain trajectories showed a clockwise rotation trend as intermediate principal stress increased, indicating enhanced volumetric deformation.
  • Failure modes identified were penetrating, discrete, and indistinct shear bands, influenced by hydrostatic pressure.
  • Increased hydrostatic pressure caused shear bands to shift from dilatant to contractive behavior, affecting plastic hardening.

Cite This Study

Liu et al. (2026) studied this question.

synapsesocial.com/papers/6a508b536eeac72a437a0189https://doi.org/10.1007/s40948-026-01189-5
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Deformation and Failure Characteristics of Three Sandstone Types Under True Triaxial Stress With a Fixed Lateral Stress Difference2026
  2. 2True triaxial unloading test on the mechanical behaviors of sandstone: Effects of the intermediate principal stress and structural plane2024 · 33 citations
  3. 3Numerical investigation of strength and micro-cracking behavior of anisotropic sandstone under true triaxial stress2026 · 2 citations
  4. 4Progressive damage and fracture behavior of brittle rock under multi-axial prestress constraint and cyclic impact load coupling2024 · 8 citations
  5. 5Study on True triaxial Creep Experiment and Viscoplastic Creep Constitutive Model of Sandstone under Coupled damage Conditions at Submicroscopic Scales2026