MESOSCALE FRACTURE MODELING OF FOUR-PHASE CONCRETE USING A DEM-ENHANCED STRUCTURE GENERATION METHOD
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Published:2024
Issue:2
Volume:22
Page:27-48
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ISSN:1543-1649
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Container-title:International Journal for Multiscale Computational Engineering
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language:en
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Short-container-title:Int J Mult Comp Eng
Author:
Song Hangtian,Guo Ning,Chen Xudong,Xu Wenxiang,Cao Yajun,Meng Qingxiang
Abstract
The two-dimensional mesoscale concrete model consists of aggregates, mortar, interfacial transition zones, and pores, of which each component is not negligible. This paper proposes a new approach to generate four-phase concrete models by assigning the geometries of small pores to fine aggregates, redistributing all aggregates via the DEM packing method with periodic boundary, and removing some aggregates based on specified pore area intervals and porosity. The size and geometry of aggregates and pores are random. Additionally, this work adopts the rigid block discrete element method to simulate the fracture behavior of these concrete models. Each rigid block is transformed from a finite element mesh, and there are no voids between them, which is more realistic than classical ball-based discrete elements. The effects of aggregate volume fraction, porosity, and pore size are also discussed. This work offers a more practical and effective approach to analyzing the impact of these factors on concrete.
Subject
Computer Networks and Communications,Computational Mechanics,Control and Systems Engineering
Reference47 articles.
1. Bazant, Z. and Planas, J., Fracture and Size Effect in Concrete and Other Quasibrittle Materials, New York: CRC Press, 1997. 2. Beasman, L. and McCuen, R., Estimating the Distribution of Air Voids in Concrete, Civil Eng. Dimension, vol. 13, pp. 15-20, 2011. 3. Bourih, A., Kaddouri,W., Kanit, T., Madani, S., and Imad, A., Effective Yield Surface of Porous Media with Random Overlapping Identical Spherical Voids, J. Mater. Res. Technol., vol. 7, pp. 103-117, 2018. 4. Cao, Y., Shen, W., Shao, J.-F., and Wang, W., Numerical Homogenization of Elastic Properties and Plastic Yield Stress of Rock-Like Materials with Voids and Inclusions at Same Scale, Eur. J. Mech. A/Solids, vol. 81, Article ID 103958, 2020. 5. Chen, F. and Qiao, P., Probabilistic Damage Modeling and Service-Life Prediction of Concrete under Freeze-Thaw Action, Mater. Struct., vol. 48, pp. 2697-2711, 2015.
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