Mahdevari Satar, Sayehvand Habibollah, Bakhtiari Haftlang Pedram
Department of Mining Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran.
Department of Mechanical Engineering, Faculty of Engineering, Bu-Ali Sina University, Hamedan, Iran.
Sci Rep. 2025 Apr 30;15(1):15212. doi: 10.1038/s41598-025-00277-y.
This research was conducted to determine the optimal parameters affecting the quality and efficiency of rock cutting by high-pressure Abrasive Water Jets (AWJs). The process was simulated using the combined Finite Element Method-Smoothed Particle Hydrodynamics (FEM-SPH) in LS-DYNA software. In order to validate the two-phase state of numerical model, several experimental tests were performed on Sandstone and Marble rock samples. The effect of parameters such as jet flow velocity, dwell time, abrasive volumetric concentration (feed rate), and diameter of abrasive particles on the Cutting Depth (CD) and Cutting Volume (CV) was separately investigated. The results showed that increasing the jet velocity led to an increase in CD and CV. Increasing the dwell time resulted in more energy being spent on the cutting process, leading to an increase in CD and CV. Increasing the volumetric concentration of abrasive particles up to 3% led to a sensible growth in CD and CV, but no significant effect was observed for concentrations more than 3%. Similarly, increasing the diameter of abrasive particles up to 1.25 mm led to an initial intensification in CD and CV, and thereafter any improvement was not observed. Therefore, an abrasive volumetric concentration of 3% and an abrasive particle diameter of 1.25 mm are recommended to improve the cutting quality of the rocks studied in this research, in addition to logical increasing the jet velocity and dwell time.
本研究旨在确定影响高压磨料水射流（AWJ）切割岩石质量和效率的最佳参数。采用LS-DYNA软件中的有限元法-光滑粒子流体动力学（FEM-SPH）联合方法对该过程进行模拟。为了验证数值模型的两相状态，对砂岩和大理岩岩石样本进行了多项实验测试。分别研究了射流流速、停留时间、磨料体积浓度（进给速率）和磨料颗粒直径等参数对切割深度（CD）和切割体积（CV）的影响。结果表明，射流速度的增加导致CD和CV增加。停留时间的增加导致切割过程中消耗更多能量，从而导致CD和CV增加。磨料颗粒体积浓度增加到3%会使CD和CV显著增长，但浓度超过3%时未观察到显著影响。同样，磨料颗粒直径增加到1.25毫米会使CD和CV最初增强，此后未观察到进一步改善。因此，除了合理提高射流速度和停留时间外，建议采用3%的磨料体积浓度和1.25毫米的磨料颗粒直径来提高本研究中岩石的切割质量。
