水泥混凝土切削过程仿真

Dynamic Model of Concrete Cutting Process

根据混凝土率相关连续损伤本构理论,建立了铣刨机铣削水泥混凝土的有限元模型,对不同切削深度下的水泥混凝土的切削温度、应力、应变分布情况以及切削总热能进行了有效的仿真。随着切削深度的增大,水泥混凝土路面Mises等效应力变化很小,维持在940MPa附近,但距离刀尖越近的地方应力越集中;水泥混凝土的应变随切削深度的变化较小,在1.1附近波动,故铣刨机铣削水泥混凝土也可以从剪切应变失效这方面进行研究;切削温度随着切削深度的增大而不断升高,且前角的温度要高出后角温度。

According to rate-dependent continuum damage concrete constitutive theory, a millingmachine milling concrete finite element model, under different depth of cut concrete cutting temperature, stress, strain distribution and the total cutting energy for an effective simulation. As the cutting depth increases, the cement concrete pavement Mises equivalent stress is very small, maintained at 940MPa nearby, but away from the more recent tip places morestress concentration; cement concrete strain with small changes in depth of cut, 1.1fluctuations in the vicinity, so the milling machine milling concrete shear failure can alsoconduct research in this area; cutting temperature increases with the depth of cut of the rising, and the temperature is higher than the former horn of the posterior horn of the temperature.