摘要
应用数字图像处理技术及工业CT扫描获得试件图像,结合有限元建模方法,建立了包含集料、空隙和胶浆在内的沥青混合料有限元模型,并模拟研究了沥青混合料劈裂试验。结果表明:通过定义应力集中因子,可用来描述沥青混合料内部应力的不均匀分布,级配类型、模量比、有无空隙及加载位置都对模拟结果有较大影响。采用DIP-FEM方法能够很好地将沥青混合料的微观结构和宏观力学性能结合起来。
A finite element analysis model was built for the asphalt mixture including the aggregate,the air void,and the asphalt mastic using the specimen images acquired by industrial CT and the digital image processing（DIP） as well as the finite element modeling（FEM） technique.The splitting tests（indirect tensile tests） of the asphalt mixture were simulated in consideration of the air void distribution,different loading directions,and different aggregate asphalt modulus ratios.The results indicate that the stress concentration factor can be used to describe the distribution of stress inside the asphalt mixture,and the mixture gradation,the modulus ratio,the air void and the loading position affect the simulation results significantly.By the DIP-FEM method the microstructure and the macromechanics of the asphalt mixture can be interrelated well.
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2011年第4期968-973,共6页
Journal of Jilin University:Engineering and Technology Edition
基金
国家自然科学基金项目(51008131
51038004)
华南理工大学中央高校基本科研业务费专项项目(2009ZM0206)
关键词
道路工程
沥青混合料
劈裂试验
数字图像处理
有限元法
DIP-FEM
road engineering
asphalt mixture
splitting test
digital image processing（DIP）
finite element modeling（FEM）
DIP-FEM
