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对沥青混凝土的切削过程采用离散元软件PFC2D进行动态仿真,对沥青混凝土内部的各作用力用接触粘结模型进行模拟,然后通过计算和分析建立试验参数、模型参数及模型微观参数之间的联系,再通过单轴压缩试验校正模型参数。在不同的切削前角γ0、铣削速度vc、进给速度vf和切削深度th的铣削条件下,采用单因素法和正交试验的方法对刀具的受力进行研究,由正交表分析模拟结果得到刀具前角γ0为+5°、切削速度vc为15 m/min、进给速度vf为1.32 m/min和铣削深度th为20 mm时为最优铣削条件,此时铣刀受到的铣削力相对较小。
Asphalt concrete cutting process using discrete element software PFC2D dynamic simulation, the internal force of asphalt concrete with contact bonding model to simulate, and then through the calculation and analysis of the establishment of test parameters, model parameters and the relationship between model micro parameters , And then through uniaxial compression test to correct model parameters. Under different milling conditions, such as pre-cutting angle γ0, milling speed vc, feed speed vf and cutting depth th, the stress of cutting tool was studied by single factor method and orthogonal test. The optimum milling conditions were obtained when the tool front angle γ0 was + 5 °, the cutting speed vc was 15 m / min, the feed speed vf was 1.32 m / min and the milling depth th was 20 mm, at which point the milling force Relatively small.