Mechanical Properties and Failure-Pattern of 3D Printed Hollow Cylinders and Wall Segments under Uniaxial Loading (2022-06)¶

10.1007/978-3-031-06116-5_31

Bhattacherjee Shantanu, Jain Smrati, Santhanam Manu, Thiruvenkatamani G.
Contribution - Proceedings of the 3^rd RILEM International Conference on Concrete and Digital Fabrication, pp. 209-215

Abstract

Extrusion-based 3D printed structures are heterogeneous with a combination of solid layers and weak bonds. The weak bonds can be considered to be an amalgamation ofhydrated products and air voids. The hardened state properties of 3D printed structures depend on several factors such as layer strength, bond strength, geometrical imperfection, anisotropy, and printing parameters. The geometrical imperfections may be due to compression ofindividual layers or localized buckling during printing. This research aims to study the mechanical properties of 3D printed hollow cylinders and wall segments. The hollow cylinders correspond to hollow printed columns, whereas wall segments are cut from printed walls. The wall segment used in this study had a fixed design. The study is divided into three phases: hollow cylinders were printed with different aspect ratios (L/D), and compressive strength was measured at different ages in the first phase. The second phase included displacement control tests on 150mmdiameter and 300mmheight hollow printed cylinders. The post-peak behaviour was evaluated. The cylinder fails much later than the initiation of the first crack, but the crack propagates diagonally through the bonds and layers at ultimate failure. The effect of curing (water and air curing) on the compressive strength of hollow cylinders was further evaluated. In the last phase, 1 m by 1 m walls were printed, and segments were cut. The compressive strength was evaluated on the cut segments. This study shows that the initiation of crack is majorly influenced by geometrical irregularity and bond strength between the layers for the hollow cylinders. Whereas, for the wall segment, cracks initiated and propagated through the wall leaves and ribs connection.

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5 References

2 Citations

BibTeX

@inproceedings{bhat_jain_sant_thir.2022.MPaFPo3PHCaWSuUL,
  author            = "Shantanu Bhattacherjee and Smrati Jain and Manu Santhanam and G. Thiruvenkatamani",
  title             = "Mechanical Properties and Failure-Pattern of 3D Printed Hollow Cylinders and Wall Segments under Uniaxial Loading",
  doi               = "10.1007/978-3-031-06116-5_31",
  year              = "2022",
  volume            = "37",
  pages             = "209--215",
  booktitle         = "Proceedings of the 3rd RILEM International Conference on Concrete and Digital Fabrication: Digital Concrete 2022",
  editor            = "Richard A. Buswell and Ana Blanco and Sergio Cavalaro and Peter Kinnell",
}

Formatted Citation

IEEE

S. Bhattacherjee, S. Jain, M. Santhanam and G. Thiruvenkatamani, “Mechanical Properties and Failure-Pattern of 3D Printed Hollow Cylinders and Wall Segments under Uniaxial Loading”, in Proceedings of the 3^rd RILEM International Conference on Concrete and Digital Fabrication: Digital Concrete 2022, 2022, vol. 37, pp. 209–215. doi: 10.1007/978-3-031-06116-5_31.

CMOS

Bhattacherjee, Shantanu, Smrati Jain, Manu Santhanam, and G. Thiruvenkatamani. “Mechanical Properties and Failure-Pattern of 3D Printed Hollow Cylinders and Wall Segments Under Uniaxial Loading”. In Proceedings of the 3^rd RILEM International Conference on Concrete and Digital Fabrication: Digital Concrete 2022, edited by Richard A. Buswell, Ana Blanco, Sergio Cavalaro, and Peter Kinnell, 37:209–15, 2022. https://doi.org/10.1007/978-3-031-06116-5_31.