2024 Volume 35 Pages 13-23
When constructing concrete structures using 3D printing technology, it is important to consider the anisotropy due to the printing process. The print path influences the formation of layer interfaces and inter-filament voids and the fracture propagation behavior of the printed specimen. In this paper, the fracture propagation behavior of mortar printed specimens under compressive, tensile, and flexural stresses are evaluated for different print paths. Under compression loading, the internal structure was observed by X-ray CT, and the displacement distribution was evaluated by 3D scanning. Under tensile and bending stresses, the effects of the print path on fracture propagation behavior were evaluated by digital image correlation. The results show that the fracture propagation behavior changed based on the inter-filament void structure, depending on the print path.
