Numerical Analysis on Mechanical Properties of Coral Aggregate Concrete Using 3D Random Mesoscale Model

被引：0
|
作者：
Wu Z. [1 ]
Zhang J. [2 ]
Yu H. [1 ]
Ma H. [1 ]
Fang Q. [3 ]
机构：
[1] College of Civil Aviation, Nanjing University of Aeronautics and Astronautics, Nanjing
[2] School of Civil Engineering, Southeast University, Nanjing
[3] College of National Defence Engineering, Army Engineering University of PLA, Nanjing
来源：
Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2021年 / 49卷 / 11期
关键词：
3D mesoscale modelling; Coral aggregate concrete; Dynamic mechanical property; Random convex particle model; Static mechanical property; Strain rate effect;
D O I：
10.14062/j.issn.0454-5648.20210124
中图分类号：
学科分类号：
摘要：
To investigate the mechanical behavior and failure mechanism of coral aggregate concrete (CAC) under static and dynamic load, this paper proposed a 3D random mesoscale model composed of three mesoscale components, i.e., aggregate, mortar matrix and interfacial transition zone (ITZ). Using the 3D random convex particle model into the characterization of the random features of broken coral aggregates, i.e., shape and spatial distribution, was proposed. Based on the developed model and corresponding material models, i.e., CONCRETE_DAMAGE_REL3 and HOLMQUIST-JOHNSON-COOK, the static- and dynamic responses of CAC were analyzed in terms of stress-strain relation, failure pattern and process, strain rate effect, etc. The failure mechanism of CAC under different loading conditions was discussed as well. The results indicate that there is a high reliability for the developed 3D random mesoscale model in simulating the static- and dynamic properties of CAC, particularly in its failure patterns and fracture processes, which is of great significance for the failure mechanism analysis of CAC under various loading conditions. © 2021, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.
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页码：2518 / 2528
页数：10
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