Abstract
Microcapsule-enabled self-healing concretes are appealing due to the advantages of self-healing and the potential for controllable quantifiable healing on a large scale with little initial damage. The damage-healing mechanics and discrete element method (DEM) are emerging as increasingly adopted approaches for investigating the damage phenomenon of materials. Based on experimental results, a two-dimensional micromechanical damage-healing model and a 3D discrete element model of microcapsule-enabled self-healing cementitious materials are proposed. The healing effect on microcrack-induced damage can now be predicted quantitatively by its microscopic healing mechanism. Subsequently, different system parameters of the microcapsule-enabled self-healing concrete, such as the radius and volume fraction of microcapsules, fracture toughness of healing agents, and initial damage, are investigated. In particular, the proposed damage-healing models demonstrate the potential capability to explain and simulate the physical behavior of microcapsule-enabled self-healing materials at multi-scales.
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Acknowledgments
This research was funded by the National Natural Science Foundation of China (No. 52002040), the State Key Laboratory of High Performance Civil Engineering Materials (No. 2020CEM004) and the Fundamental Research Funds for the Central Universities (No. 2020CDJQY-A002).
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Zhou, S., Ju, J.W., Zhu, H.H., Yan, Z.G. (2020). Class of Damage-Healing Models for Cementitious Composites at Multi-scales. In: Voyiadjis, G.Z. (eds) Handbook of Damage Mechanics. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-8968-9_51-1
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DOI: https://doi.org/10.1007/978-1-4614-8968-9_51-1
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