What does this research mean for the field?

The proposed Stiffness Rising Contact Model (SRCM) accurately captures the stress-strain response and crack closure behavior of rocks under triaxial compression, yielding significantly smaller errors than traditional constant stiffness models. Novelty: ClaimNovelty.METHODOLOGICAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

This study aims to explore how microcracks affect stiffness during crack closure under triaxial compression.

June 6, 2026International Journal for Numerical and Analytical Methods in Geomechanics

The Behavior of Compression‐Hardening at Crack Closure Stage Explored by Stiffness Rising Model (SRCM) Under Triaxial Compression: A DEM Study

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Authors

JRJunnan RenSouthwest Jiaotong University QYQixiang YanSouthwest Jiaotong University JWJie WeiMinistry of Education of the People's Republic of China

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Implication

Randomized trial examines stiffness evolution in microcracked materials, suggesting a new modeling approach.

Key Points

This study aims to explore how microcracks affect stiffness during crack closure under triaxial compression.
Developed a stiffness rising contact model (SRCM) to simulate stiffness evolution.
Conducted numerical simulations using 2D discrete element model (DEM) framework based on ISRM standards.
Analyzed the relationship between secant shear modulus and deviatoric stress during crack closure.
The SRCM predicted stress-strain responses closely match experimental data from red sandstone.
The model demonstrated significantly smaller errors compared to the constant stiffness approach.
Found a power function accurately describes the relationship between shear modulus and deviatoric stress.

Cite This Study

Ren et al. (2026) studied this question.

synapsesocial.com/papers/6a23bafd71a5da9775e76a14 https://doi.org/10.1002/nag.70360

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The Behavior of Compression‐Hardening at Crack Closure Stage Explored by Stiffness Rising Model (SRCM) Under Triaxial Compression: A DEM Study

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Key Points

Cite This Study

The Behavior of Compression‐Hardening at Crack Closure Stage Explored by Stiffness Rising Model (SRCM) Under Triaxial Compression: A DEM Study

Discussion

Member takes

Implication

Key Points

Cite This Study

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