A Predictive Model to Determine Tensile Strength and Fracture-Toughness of 3D Printed Fiber-Reinforced Concrete Loaded in Different Directions (2022-03)¶

10.1016/j.tafmec.2022.103309

Yang Shutong, Lan Tian, Sun Zhongke, Xu Mingqi, Wang Mingxin, Feng Yaodong
Journal Article - Theoretical and Applied Fracture Mechanics, Vol. 119

Abstract

Concrete 3D printing is getting increased attention in civil engineering. Fibers are generally added to reinforce printed concrete. Crack resistance of 3D printed fiber reinforced concrete in different directions need to be evaluated in a rational manner due to its anisotropic behavior. Therefore, fracture test was performed on printed and mold-cast concrete first in this paper, and failure mechanism were then examined. An analytical model was subsequently proposed based on the analysis of test results to predict the realistic tensile strength ft, fracture toughness KIC and fracture energy GF in different loading directions by incorporating material heterogeneity and discontinuity. The physical meaning of microstructure characteristic parameter reflecting the material heterogeneity was clarified according to the degree of fiber toughness. Closed-form solutions of ft, KIC and GF were obtained related to the maximum fracture load Fmax. The influence of loading direction on the predicted fracture parameters was analyzed and discussed. Results show that the ft, KIC and GF from specimens loaded perpendicularly to the printing direction were significantly larger than those parallel to the printing direction. Besides, the formers were also higher than the parameters from mold-cast specimens due to the fiber preferential alignment along the printing direction in printed concrete.

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30 References

24 Citations

BibTeX

@article{yang_lan_sun_xu.2022.APMtDTSaFTo3PFRCLiDD,
  author            = "Shutong Yang and Tian Lan and Zhongke Sun and Mingqi Xu and Mingxin Wang and Yaodong Feng",
  title             = "A Predictive Model to Determine Tensile Strength and Fracture-Toughness of 3D Printed Fiber-Reinforced Concrete Loaded in Different Directions",
  doi               = "10.1016/j.tafmec.2022.103309",
  year              = "2022",
  journal           = "Theoretical and Applied Fracture Mechanics",
  volume            = "119",
}

Formatted Citation

IEEE

S. Yang, T. Lan, Z. Sun, M. Xu, M. Wang and Y. Feng, “A Predictive Model to Determine Tensile Strength and Fracture-Toughness of 3D Printed Fiber-Reinforced Concrete Loaded in Different Directions”, Theoretical and Applied Fracture Mechanics, vol. 119, 2022, doi: 10.1016/j.tafmec.2022.103309.

CMOS

Yang, Shutong, Tian Lan, Zhongke Sun, Mingqi Xu, Mingxin Wang, and Yaodong Feng. “A Predictive Model to Determine Tensile Strength and Fracture-Toughness of 3D Printed Fiber-Reinforced Concrete Loaded in Different Directions”. Theoretical and Applied Fracture Mechanics 119 (2022). https://doi.org/10.1016/j.tafmec.2022.103309.