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<p>Intersecting defects are common in ceramics; however, their damage behavior under uniaxial compression remains less understood compared to that of single defects. This study investigates ceramic materials using the discrete element method (DEM) for numerical simulations. The DEM parameters are first calibrated through microcell experiments, after which DEM models with varying intersecting and orientation angles are developed. By applying a uniaxial compressive load, this study examines crack propagation mechanisms, the mechanical properties of ceramics, and the stress distribution around defects. The findings reveal that both the intersecting and orientation angles significantly influence crack initiation patterns and fracture modes. Moreover, the calculated compressive strength and elastic modulus depend on these angles, forming a distinctive “moth-like” shape in three-dimensional space. The simulated Stress Intensity Factors align well with theoretical predictions. This research offers valuable insights into the damage mechanisms and mechanical properties of ceramic materials with micro-defects, contributing to a deeper understanding of their structural behavior.</p>

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Fracture mechanisms of ceramics with intersecting defects under uniaxial compressive loading using discrete element method

  • 期刊论文

  • 发表日期：

    2026年3月18日

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  • Jianye Zhang,
  • Rongzhen Wang,
  • Yulin Sun,
  • Hongfei Gao,
  • Jiarui Li,
  • Jian Zhang,
  • Yafeng Li

摘要

Intersecting defects are common in ceramics; however, their damage behavior under uniaxial compression remains less understood compared to that of single defects. This study investigates ceramic materials using the discrete element method (DEM) for numerical simulations. The DEM parameters are first calibrated through microcell experiments, after which DEM models with varying intersecting and orientation angles are developed. By applying a uniaxial compressive load, this study examines crack propagation mechanisms, the mechanical properties of ceramics, and the stress distribution around defects. The findings reveal that both the intersecting and orientation angles significantly influence crack initiation patterns and fracture modes. Moreover, the calculated compressive strength and elastic modulus depend on these angles, forming a distinctive “moth-like” shape in three-dimensional space. The simulated Stress Intensity Factors align well with theoretical predictions. This research offers valuable insights into the damage mechanisms and mechanical properties of ceramic materials with micro-defects, contributing to a deeper understanding of their structural behavior.