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    Öğe
    3D-printed geogrids' tensile performance: impact of filament type
    (Emerald Group Publishing Ltd, 2025) Ok, Bahadir; Unverdi, Murteda; Seyedzavvar, Mirsadegh; Boga, Cem; Sarici, Talha
    Purpose - This study aims to explore the potential of three-dimensional (3D) printing technology to enhance geogrid production, focusing on the influence of filament type on tensile performance. Geogrids, which reinforced soils by forming interlocking mechanisms with soil grains, were manufactured using polypropylene (PP) and polyethylene terephthalate glycol-modified (PET-G) filaments. The printability of these materials, along with thermoplastic polyurethane (TPU) and high-density polyethylene (HDPE), was initially assessed, revealing challenges with TPU and HDPE. Design/methodology/approach - Tensile tests, conducted on both single-rib and multirib samples, compared the mechanical performance of the 3D-printed geogrids against a factory-made PP geogrid. Findings - The results indicated that while the factory-made geogrid demonstrated superior tensile strength and ductility, 3D-printed geogrids, particularly those made with PP, exhibited promising tensile characteristics that could be suitable for specific applications. However, 3D-printed PET-G geogrids showed higher tensile strength but were more brittle. The findings suggest that although 3D printing offers a viable method for geogrid production, further optimization is required to achieve performance levels comparable to traditional manufacturing methods. Originality/value - While existing research on 3D-printed geogrids exists, studies comparing them with their factory-produced counterparts are currently limited. This research provides a unique comparison of the tensile modulus, elongation and tensile strength of factory-made geogrids and 3D-printed geogrids produced with different filaments.
  • [ X ]
    Öğe
    An investigation into the use of 3D printing technology for geogrids
    (Emerald Group Publishing Ltd, 2026) Ok, Bahadir; Unverdi, Murteda
    Three-dimensional (3D) printers with large-scale printing capabilities may enable engineers to print their geogrids, which would be especially useful at outlying construction sites where acquiring geogrid can be challenging or expensive. Nevertheless, for 3D geogrids to be used effectively for geotechnical applications like mechanically stabilised earth walls (MSE walls) or ground improvement, they must be able to interlock with soils in a manner similar to factory-made geogrids. The aim of this study is to comprehensively investigate the interlocking mechanisms of 3D-printed geogrids with different soils by comparing them with factory-made geogrids. To achieve this, tensile tests were conducted to determine the tensile characteristics of the 3D-printed geogrids produced in the study. In addition, large-scale direct shear tests were performed by placing 3D geogrids with soils of different grain roundness values. All test results were presented by comparing them with the test results conducted on factory-made geogrids with properties similar to the 3D-printed geogrids. The 3D-printed geogrid improved the soil shear strength; however, it was found to be more brittle and provided less interlock with soils than the factory-made geogrid. These results suggest that the production method of the geogrid was a significant factor.