Meso-Scale Simulation of Concrete Uniaxial Behavior Based on Numerical Modeling of CT Images

doi:10.3390/ma12203403

CORC > 武汉岩土力学研究所 > 中科院武汉岩土力学所 > 岩土力学所知识全产出 > 期刊论文

	Meso-Scale Simulation of Concrete Uniaxial Behavior Based on Numerical Modeling of CT Images
	Sun, Haokai ; Gao, Yang ; Zheng, Xinyu ; Chen, Yibo ; Jiang, Zhen ; Zhang, Zeyao
刊名	MATERIALS
	2019
卷号	12 期号:20 页码:-
关键词	aggregate boundary CT grain based model
DOI	10.3390/ma12203403
英文摘要	It is important to study the failure mechanism of concrete by observing the crack expansion and capturing key structures at the mesoscale. This manuscript proposed a method for efficiently identifying aggregate boundary information by X-ray computed tomography technology (CT) and a discrete element modeling method (DEM) for equivalent random polygon aggregates. This method overcomes the shortcomings of the Grain Based Model (GBM) which is impossible to establish a mesoscopic model with a large difference in grain radius. Through the above two methods, the CT slice images were processed in batches, and the numbers of edges, axial length, elongation of the aggregate were identified. The feasibility of the method was verified by the comparison between experimental and simulating results. Three mesoscopic models for different porosities were established. Based on aggregate statistics, this manuscript achieved the meso-model recovery to the maximum extent. The test results show that the crack appeared at the tip of the aggregate firstly, and then the broken boundary was applied in the direction of the applied load and around the pores. Finally, the crack was selectively expanded under the axial force. During the loading process, the minor principal stress was normally distributed. As the porosity and loading time increased, the heterogeneity increased.
WOS研究方向	Materials Science
语种	英语
WOS记录号	WOS:000498402100125
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/14865]
专题	岩土力学所知识全产出_期刊论文
作者单位	1.Shijiazhuang Tiedao Univ, Hebei Prov Key Lab Struct Hlth Monitoring & Contr, Shijiazhuang 050043, Hebei, Peoples R China; 2.Chinese Acad Sci, State Key Lab Geomech & Geotech Engn, Inst Rock Soil Mech, Wuhan 430071, Hubei, Peoples R China; 3.Shandong Univ, Geotech & Struct Engn Res Ctr, Jinan 250061, Shandong, Peoples R China; 4.Southwest Jiaotong Univ, Key Lab Transportat Tunnel Engn, Minist Educ, Chengdu 610031, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	Sun, Haokai,Gao, Yang,Zheng, Xinyu,et al. Meso-Scale Simulation of Concrete Uniaxial Behavior Based on Numerical Modeling of CT Images[J]. MATERIALS,2019,12(20):-.
APA	Sun, Haokai,Gao, Yang,Zheng, Xinyu,Chen, Yibo,Jiang, Zhen,&Zhang, Zeyao.(2019).Meso-Scale Simulation of Concrete Uniaxial Behavior Based on Numerical Modeling of CT Images.MATERIALS,12(20),-.
MLA	Sun, Haokai,et al."Meso-Scale Simulation of Concrete Uniaxial Behavior Based on Numerical Modeling of CT Images".MATERIALS 12.20(2019):-.