胎/路多场耦合作用下沥青路面摩擦磨损机理研究

项目名称： 胎/路多场耦合作用下沥青路面摩擦磨损机理研究

项目编号： No.51308042

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 建筑科学

项目作者： 孙凤艳

作者单位： 北京科技大学

项目金额： 25万元

中文摘要： 良好的路面摩擦学性能是保障行车安全的前提条件，对社会经济有着重要的影响。我国公路发展历程不长，对于路面摩擦学性能演化规律认识不足，缺乏对多种因素不同演化模式的综合分析，通车后路面摩擦学性能随着车辆磨耗衰减很快。因此本研究首先在纳米尺度上解析轮胎和沥青路面的微观构造和表面特性，建立三维单体模型和整体接触模型，从本质上解析胎/路界面物理、化学和热力学特性；然后基于纳米摩擦学原理，考虑轮胎和沥青路面表面构造、荷载和环境的耦合作用，对胎/路界面摩擦磨损性能进行分子动力学模拟分析，从原子、分子尺度揭示界面摩擦、磨损和润滑等摩擦学行为的力学响应特征；最后进行多场耦合作用下沥青路面摩擦磨损性能演化的分子动力学模拟，探索材料微观性能变化与宏观结构损伤间的联系，研究沥青路面摩擦磨损性能演化规律及衰减机理，建立摩擦磨损寿命预测模型。从而为高速公路沥青路面的摩擦磨损性能评估和寿命预测提供有效的研究手段。

中文关键词： 沥青路面；纳米摩擦学；集料；磨损性能；寿命预测

英文摘要： Good tribological performance of asphalt pavement is the precondition for the safety of driving vehicles, that has an important impact on social economy. Our country's highway development history is not long, there has shortage in pavement tribology study. The tribological performance of asphalt pavement attenuate quickly once the road come into service. In this study, firstly, micro structure and surface properties of the tire and asphalt pavement are analysized, three-dimensional single model and integral contact model are established, and then the physical, chemical and thermodynamic performance on tire/road interface are analysized essentially. Secondly, based on the nano tribology principle，the tribological performances of tire/road interface is studied with molecular dynamics simulation, and the coupling action of surface structure，load and environment are considered. The mechanical response characteristics of the tribological behavior such as friction, wear and lubrication are studied frome atomic scale and molecular scale. Lastly, tribological performance evolution of asphalt pavement is studied with molecular dynamics simulation. Relation of micro material properties and the macro structural damage is explored, the tribological performance evolution discipline of asphalt pavement and attenuation mechani

英文关键词： asphalt pavement；nano-tribology；aggregate；wear resistance；life prediction