THREE PHASE MESOSCOPIC CONCRETE MODEL BASED ON REAL INNER STRUCTURE OF CONCRETE SAMPLE
From a mesoscopic point of view,concrete are heterogeneous materials which be defined as a combination of at least two chemically and mechanically distinct materials with a definite interface separating the components.It is hard to deny the significant chemically and mechanically differences among the aggregate,mortar and interface transition zone (ITZ).The photos of sample section are full of this useful information,for example,including the space distribution of aggregates,the shape of aggregates,the areas of aggregates and so on.This information seldom can be caught by the generally random model which is generated through algorithms.Nowadays the quick development of image processing techniques enhances researchers ability to deal with real digital images of concrete samples section.Based on this image,different material parameters represents aggregate,mortar and interfacial transition zone (ITZ) are related to finite elements individually,so digital image-based finite element (FE) model is build.With the help of digital image-based FE model,the results of numerical simulation can be compared with the real ones.
image processing technique finite element method numerical simulation
X.Wu J.Li
Department of Building Engineering.Tongji University,shanghai 20092,China
国际会议
第二届国际非均质材料力学会议(The Second International Conference on Heterogeneous Material Mechanics)
安徽黄山
英文
1173-1176
2008-06-03（万方平台首次上网日期，不代表论文的发表时间）