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Geomechanics and Engineering
  Volume 20, Number 5, March10 2020, pages 421-432

Complex analysis of rock cutting with consideration of rock-tool interaction using distinct element method (DEM)
Guangzhe Zhang, Wengang Dang, Martin Herbst and Zhengyang Song

    Cutting of rocks is very common encountered in tunneling and mining during underground excavations. A deep understanding of rock-tool interaction can promote industrial applications significantly. In this paper, a distinct element method based approach, PFC3D, is adopted to simulate the rock cutting under different operation conditions (cutting velocity, depth of cut and rake angle) and with various tool geometries (tip angle, tip wear and tip shape). Simulation results showed that the cutting force and accumulated number of cracks increase with increasing cutting velocity, cut depth, tip angle and pick abrasion. The number of cracks and cutting force decrease with increasing negative rake angle and increase with increasing positive rake angle. The numerical approach can offer a better insight into the rock-tool interaction during the rock cutting process. The proposed numerical method can be used to assess the rock cuttability, to estimate the cutting performance, and to design the cutter head.
Key Words
    crack pattern; cutting force; rake angle; rock-tool interaction; sandstone; tip abrasion
Guangzhe Zhang, Martin Herbst and Zhengyang Song: Geotechnical Institute, TU Bergakademie Freiberg, Gustav-Zeuner-Str. 1, 09599 Freiberg, Germany

Wengang Dang: 1.) School of Civil Engineering, Sun Yat-sen University, Gungzhou 520275, China
2.) Key Laboratory of Marine Civil Engineering of Guangdong, Guangzhou, 510006, China
3.) Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai, 519082 China

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