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<p>Vibrational disc cutting technique is an efficient hard rock excavating method. However, the alterations in rock structure post-failure and the changing contact dynamics between the rock and the cutter results in ambiguous patterns of stress variation within the cutter. A finite element simulation model was established to simulate crack propagation and stress variation during the rock cutting process. The findings reveal that under the influence of the vibration force, the cutting motion of the disc cutter exhibits quasi-periodic fluctuations. The rock damage pattern indicates that in the early stage of cutter penetration, a through-crack forms in the middle of the rock. Subsequently, the damage area expands to both sides and the bottom of the cutting area. Stress analysis of the cutter reveals that the outer edge and the bottom edge are stress concentration areas, when the disc cutter has local contact with the rock, the stress value significantly increases. This research provides a theoretical foundation for optimizing the structural design and working parameters of disc cutters.</p>

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Numerical investigation on rock breakage patterns and stress state of disk cutter during vibrational cutting

  • 期刊论文

  • 发表日期：

    2026年2月2日

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  • Zeping Liu,
  • Zijian Wu,
  • Xuesong Wang,
  • Yanning Zhou,
  • Donghai Wang,
  • Xiangyao Liu,
  • Xiaodong Pei,
  • Hongxiang Jiang

摘要

Vibrational disc cutting technique is an efficient hard rock excavating method. However, the alterations in rock structure post-failure and the changing contact dynamics between the rock and the cutter results in ambiguous patterns of stress variation within the cutter. A finite element simulation model was established to simulate crack propagation and stress variation during the rock cutting process. The findings reveal that under the influence of the vibration force, the cutting motion of the disc cutter exhibits quasi-periodic fluctuations. The rock damage pattern indicates that in the early stage of cutter penetration, a through-crack forms in the middle of the rock. Subsequently, the damage area expands to both sides and the bottom of the cutting area. Stress analysis of the cutter reveals that the outer edge and the bottom edge are stress concentration areas, when the disc cutter has local contact with the rock, the stress value significantly increases. This research provides a theoretical foundation for optimizing the structural design and working parameters of disc cutters.