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  • Küçük Resim
    Yayın
    Effect of carbon fiber additive on tensile properties of large scale additive manufactured (LSAM) ABS single wall parts
    (Necip Fazıl Yılmaz, 2023) Eyercioğlu, Ömer; Tek, Engin; Akeloğlu, Mehmet Ali; Aladağ, Mehmet
    Additive Manufacturing (AM) is one of the most studied technologies to produce different parts today. Large-scale additive manufacturing (LSAM) is used to produce complex parts without further technological processes and for the production of large-sized polymer parts. In order for the parts produced from polymer materials to show better mechanical properties, a range of different materials is required. In this study, the tensile properties of 3D printed ABS single wall parts using LSAM were investigated experimentally. The effect of carbon fiber (0, 5%, and 10%) additive on the main mechanical properties of ABS was investigated. The tests were carried out according to ASTM D638 standards as the spatial printing direction (0? and 90?). According to the results of the tensile test, ABS material reinforced with 5% carbon fiber showed higher load resistance than other mixture ratios. In all groups, it was observed that the samples with a horizontal (0?) orientation compared to the printing direction showed better performance.
  • Küçük Resim
    Yayın
    Thermal deformation in non-planar large-scale additive manufacturing of ABS: experimental and finite element analysis
    (MDPI, 2026) Aladağ, Mehmet; Tek, Engin; Akeloğlu, Mehmet Ali; Dubicki, Adrian; Zglobicka, Izabela; Eyercioğlu, Ömer; Kurzydlowski, Krzysztof J.
    In this study, thermal deformation in non-planar, large-scale additive manufacturing (LSAM) was experimentally and numerically investigated. A B & eacute;zier-based non-planar build surface was fabricated by CNC machining, and a single layer of ABS was deposited using a hybrid LSAM system. Toolpaths with raster angles of 0 degrees and 45 degrees were generated for surface-conformal printing. Infrared thermography was employed to monitor the thermal history during deposition. A three-dimensional finite element model was developed to simulate transient heat transfer and thermally induced deformation. Experimental deformation was quantified by 3D scanning and compared with simulation results. The results show that the slope geometry strongly influences deformation direction: negative slopes promote contraction, whereas positive slopes lead to upward deflection. Maintaining the material temperature above the glass transition temperature significantly reduces skew deformation. The finite element method predictions demonstrate strong agreement with experimental measurements, with normalized root mean square errors (NRMSEs) of approximately 11% for thermal deformation and 10% for temperature history. The proposed framework enables prediction and mitigation of thermal warping in non-planar polymer additive manufacturing.