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Two dimensional distribution simulation of concrete
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In order to study the meso mechanical phenomenon of concrete, the mechanical behavior of concrete is numerically simulated. The two-dimensional meso structure is used to simulate the random placement of aggregate, which provides a numerical structure model for the finite element meso mechanical analysis of concrete, The concrete is considered as a three-phase composite material composed of aggregate, mortar and the bonding interface between them. In the process of placing, the aggregate area ratio is taken as the basic parameter, and the bonding interface thickness is taken as 5% of the aggregate radius. The aggregate shape is drawn by self-made function, and the error of using positive polygon instead of circular aggregate is analyzed, The results meet the requirements of randomness. Finally, two graded concrete and three graded concrete examples are used to verify the results
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