Meso-scale FE analyses of textile composite reinforcement deformation based on X-ray computed tomography

2014 ◽  
Vol 116 ◽  
pp. 165-176 ◽  
Author(s):  
N. Naouar ◽  
E. Vidal-Sallé ◽  
J. Schneider ◽  
E. Maire ◽  
P. Boisse
Keyword(s):  
Computed Tomography ◽  
Textile Composite ◽  
X Ray ◽  
X Ray Computed ◽  
Meso Scale ◽  
Composite Reinforcement

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

Materials ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3403 ◽  
Author(s):  
Haokai Sun ◽  
Yang Gao ◽  
Xinyu Zheng ◽  
Yibo Chen ◽  
Zhen Jiang ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Applied Load ◽  
Discrete Element Modeling ◽  
Test Results ◽  
X Ray ◽  
Mesoscopic Models ◽  
X Ray Computed ◽  
Boundary Information ◽  
Minor Principal Stress ◽  
Meso Scale

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.

3D composite reinforcement meso F.E. analyses based on X-ray computed tomography

2015 ◽  
Vol 132 ◽  
pp. 1094-1104 ◽  
Author(s):  
N. Naouar ◽  
E. Vidal-Salle ◽  
J. Schneider ◽  
E. Maire ◽  
P. Boisse
Keyword(s):  
Computed Tomography ◽  
X Ray ◽  
X Ray Computed ◽  
3D Composite ◽  
Composite Reinforcement
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