基于离散元法的沥青混合料微观力学模型研究

The Study on Micromechanics Model of Asphalt Mixture based on DEM

沥青混合料是一种气-液-固多相复合的材料,是不连续的离散介质,因此从介质离散角度出发的离散单元法(DEM)比从材料连续角度出发的有限元法能更加精确地模拟沥青混合料的特性。根据胶浆理论,把沥青混合料看作是级配粗集料和沥青砂浆的复合体,对该复合体中集料与集料之间、粗集料内部、集料与沥青砂浆之间、沥青砂浆内部的微观力学模型进行了分析,并提出了自己的一些改进意见。

Asphalt mixture is a kind of gas - liquid - solid multiphase composite materials, is discrete discontinuities, therefore the discrete element method starting from the discrete angle （DEM） characteristics than the finite element method based on the material continuous angle can be more accurate simulation of asphalt mixture. According to the mortar theory, the asphalt mixture as complex gradation of coarse aggregates and asphalt mortar, on, the complex between aggregate and aggregate coarse aggregate, set between the internal micro mechanical model, material and asphalt mortar asphalt mortar internal is analyzed, and puts forward some improvement opinions from his.