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June 5, 2026Scientific ReportsOpen Access

A discrete element model for rock pressure sensitivity and stress-driven contact stiffness evolution

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Authors

CWCong WangYZYong ZhaoYZYongquan Zhu

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Overview

Randomized trial evaluates a new model predicting rock behavior in deep environments, suggesting improved stress response accuracy.

Key Points

  • This study aims to develop a more accurate discrete element model to describe rock mechanical behavior under high stress conditions.
  • Integrated triaxial test data from multiple rock types including granite, slate, and sandstone.
  • Developed a variable stiffness parallel bond model with real-time contact stiffness updating.
  • Implemented a multi-confining-pressure calibration strategy for improved parameter mapping.
  • The model accurately reproduced the full stress-strain curves in validation tests.
  • Observed a relative error in peak strength that remained within a small margin.
  • Captured key pressure-sensitive responses such as peak strength enhancement and brittleness transition.

Cite This Study

Wang et al. (2026) studied this question.

synapsesocial.com/papers/6a22672f763171746d545ea2https://doi.org/10.1038/s41598-026-49864-7
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