Impact toughness and dynamic constitutive model of geopolymer concrete after water saturation

The dynamic compression test of geopolymer concrete (GC) before and after water saturation was carried out by the split Hopkinson pressure bar (SHPB). And the effects of water saturation and strain rate on impact toughness of GC were studied. Based on Weibull statistical damage distribution theory,...

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Bibliographic Details
Published in:Scientific reports 2024-03, Vol.14 (1), p.7117-7117, Article 7117
Main Authors: Yan, Tiecheng, Yin, Xiangxiang, Zhang, Xingyuan
Format: Article
Language:English
Subjects:
639/166
639/301
Constitutive model
Fractals
Geopolymer concrete
Humanities and Social Sciences
Impact toughness
Mathematical models
Mechanical properties
multidisciplinary
Saturation
Science
Science (multidisciplinary)
Size distribution
Statistical damage distribution theory
Strain
Stress-strain curves
Water saturation
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Summary:The dynamic compression test of geopolymer concrete (GC) before and after water saturation was carried out by the split Hopkinson pressure bar (SHPB). And the effects of water saturation and strain rate on impact toughness of GC were studied. Based on Weibull statistical damage distribution theory, the dynamic constitutive model of GC after water saturation was constructed. The results show that the dynamic peak strain and specific energy absorption of GC have strain rate strengthening effect before or after water saturation. The impact toughness of GC decreases after water saturation. The size distribution of GC fragments has fractal characteristics, and the fractal dimension of GC fragments after water saturation is smaller than that before water saturation. The dynamic constitutive model based on Weibull statistical damage distribution theory can accurately describe the impact mechanical behavior of GC after water saturation, and the model fitting curves are in good agreement with the experimental stress–strain curves.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-024-57760-1