2D and 3D homogenization and fracture analysis of concrete based on in-situ X-ray Computed Tomography images and Monte Carlo simulations
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- 作者：Yujie Huang ; Dongming Yan ; dmyan@zju.edu.cn" class="auth_mail" title="E-mail the corresponding author ; Zhenjun Yang ; Guohua Liu
- 关键词：Mesoscale modelling of concrete ; In-situ X-ray Computed Tomography ; Image-based modelling ; Homogenization ; Damaged plasticity model
- 刊名：Engineering Fracture Mechanics
- 出版年：2016
- 出版时间：September 2016
- 年：2016
- 卷：163
- 期：Complete
- 页码：37-54
- 全文大小：5220 K
文摘
The homogenized elastic properties and tensile fracture behaviours of concrete are captured by Monte Carlo simulations (MCSs) of realistic meso-scale models based on high-resolution micro-scale X-ray Computed Tomography (XCT) images, using asymptotic homogenization and the concrete damaged plasticity (CDP) model. The obtained realistic models are quite promising in characterising meso-scale mechanical behaviours of concrete. The statistical analysis shows that the intrinsic heterogeneity of meso-structures caused by random spatial distribution of multi-phases can significantly affect macroscopic responses of concrete, e.g. homogenized elastic properties, crack patterns and load-carrying capacities. Moreover, since the 3D model is built from 2D images by a bottom-up stacking algorithm, the resultant 3D model is strongly correlated to the 2D models in physical nature, thus the 2D-3D comparisons can yield more insightful views. The effects of aggregate/void area fraction on homogenized elastic modulus and tensile strength are also analysed.