Dynamic splitting behavior of microcapsule-based self-healing cementitious composites under SHPB impact loading

Sheng, Min; Wang, Xianfeng; Huang, Yijiao; Song, Qiao; Zhou, Xiaoqing; Yang, Lei; Xing, Feng

doi:10.1016/j.jobe.2024.109638

Journal of Building Engineering

2024

DOI: 10.1016/j.jobe.2024.109638

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Dynamic splitting behavior of microcapsule-based self-healing cementitious composites under SHPB impact loading

Min Sheng,

Xianfeng Wang,

Yijiao Huang

et al.

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Mesoscale Modeling of Microcapsule-Based Self-Healing Cementitious Composites under Dynamic Splitting Tension

Zhou,

Lu,

Wang

2024

Buildings

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Microcapsule-based self-healing cementitious composite (MSCC) offers autonomous damage repair, extending the service life of structures. However, most of the existing studies focus on static behavior and healing effectiveness but rarely explore dynamic responses. This study developed the mesoscale modeling approach to investigate MSCC behavior under dynamic split tensile loading. At the mesoscale, MSCC can be treated as a four-phase composite consisting of coarse aggregates, interfacial transition zones, cement mortar, and microcapsules. Alternatively, it can be simplified as a two-phase composite comprising a homogeneous mortar matrix and microcapsules. Four-phase and two-phase mesoscale MSCC models were developed for 2D simulations, while a two-phase 3D model was also developed for comparison. Mesoscale numerical simulations were conducted based on Split-Hopkinson Pressure Bar Brazilian disk-splitting tests, considering various strain rates. Simulation results of different mesoscale models were compared with experimental results. All of the models accurately predicted the tensile strength of MSCC, with the 2D four-phase model providing the best representation of failure modes and crack propagation. Both experimental and numerical data exhibited obvious strain rate effects, indicating that MSCC’s mechanical properties were sensitive to the loading rate. Dynamic increase factors were obtained, quantifying rate sensitivity. The obtained dynamic mechanical properties of MSCC provide insights for designing MSCC components and structures that can better withstand collisions or explosions.

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Mesoscale Modeling of Microcapsule-Based Self-Healing Cementitious Composites under Dynamic Splitting Tension

Zhou,

Lu,

Wang

2024

Buildings

View full text Add to dashboard Cite

show abstract

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Dynamic splitting behavior of microcapsule-based self-healing cementitious composites under SHPB impact loading

Cited by 1 publication

References 61 publications

Mesoscale Modeling of Microcapsule-Based Self-Healing Cementitious Composites under Dynamic Splitting Tension

Mesoscale Modeling of Microcapsule-Based Self-Healing Cementitious Composites under Dynamic Splitting Tension

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