沥青混合料断裂数值模拟进展  

Advance in Numerical Simulation of Asphalt Mixture Fracture

作　　者：张东 何亮[1] 侯曙光[2] 边疆[2] 

机构地区：[1]重庆交通大学交通土建工程材料国家地方联合工程实验室,重庆400074 [2]南京工业大学道路工程研究所,江苏南京210009

出　　处：《公路交通科技》2017年第12期1-8,22,共9页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金项目(51608266);中国博士后科学基金项目(2016M590448);重庆交通大学交通土建工程材料国家地方联合工程实验室开放基金项目(LHSYS-2014-011)

摘　　要：以沥青混合料为建筑材料的沥青路面是我国高等级公路的主要铺面形式,裂缝是造成沥青路面破坏的主要原因之一。研究沥青混合料的开裂机理有助于优化沥青混合料的设计,提高其抗裂性能。数值模拟是研究沥青混合料断裂的有效手段。但是,由于沥青混合料组成材料的多相性和细观结构的不均匀性,沥青混合料的断裂模式非常复杂。尽管目前断裂力学理论和数值模拟手段取得了很大进步,沥青混合料的断裂模拟问题还处于探索阶段。本研究总结了基于经典断裂力学理论的有限元方法、内聚力模型的有限元方法、细观结构模型的有限元方法和细观结构模型的离散元方法在沥青混合料断裂模拟中的应用和取得的成果。在分析各种数值模拟方法优劣的基础上,展望了今后的研究重点。在有限元方面,建议进一步研究基于沥青混合料三维细观结构的有限元方法,重点解决三维细观结构构建、计算收敛性和单元畸变问题。在离散元方面,建议进一步研究基于沥青混合料三维细观结构的离散元方法,重点解决计算效率和细观断裂本构模型问题。Asphalt pavement constructed with asphalt mixture is the main type of high - grade roads in China. Cracking is one of the main reasons for the asphalt pavement failure. Investigation of the fracture mechanism of asphalt mixture helps to optimize the asphalt mixture design and increase its crack resistance. Numerical modeling is a useful tool for studying the fracture of asphalt mixture. However, the fracture mode of asphalt mixture is very complicated because of the heterogeneity of material and the nonuniformity of mesostructure. The fracture simulation of asphalt mixture is at the stage of exploration although the fracture mechanics theory. and numerical simulation methods have made great progress. Several methods applied in the fracture simulation and the progress, such as the finite element method based on classical theory of fracture mechanics, the finite element method based on the cohesive zone model, the finite element method based on the mesostructure model, and the discrete element method based on the mesostructure model, are summarized. Furthermore, the future research focus is summarized based on the advantages and disadvantages of different numerical methods. For the finite element method, the model based on the 3D mesostructure of asphalt mixtures should be further studied, the 3 D mesostructure construction, computational convergence and element distortion are the main problems to be solved. For the discrete element method, the model based on 3D mesostructure of asphalt mixture should be further studied, and the computational efficiency and mesoscopic fracture constitutive model are the main problems to be solved.

关 键 词：道路工程 断裂研究进展 数值模拟 沥青混合料 内聚力模型 

分 类 号：U416.217[交通运输工程—道路与铁道工程]