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    Determination of initial failure loads of 3D printed ABS polymers reinforced with different Kevlar/epoxy composite layers using the finite element method
    (İdris Karagöz, 2025) Benli, Semih
    Additive manufacturing (AM) is a manufacturing method that is rapidly advancing in industrial applications and is also known as 3D printing. Fused Deposition Modeling (FDM) is one of the widely used additive manufacturing techniques due to its ability to produce complex and relatively high strength parts from low-cost polymer materials. One of the most widely used materials with FDM is acrylonitrile butadiene styrene (ABS). However, the low strength and elastic modulus of ABS limit its use alone. The aim of this study was to determine the failure load of different sandwich structures formed with knitted Kevlar/epoxy composite layers in order to improve the properties of ABS by using the finite element method in the ANSYS program. For this purpose, finite element models of tensile and bending samples reinforced by gluing single and double-layered, 0° and 45° oriented Kevlar/epoxy composite layers to the upper and lower surfaces of ABS with FM73 epoxy adhesive were created. For the simulation of tensile and three-point bending tests, the properties of the materials were entered into the program separately, and loading and boundary conditions were applied. In order to determine the initial damage load, the Tsai-Wu strength index value was examined and the damage loads that made this value 1 were determined. Accordingly, although the woven Kevlar/epoxy composite layers carried most of the load during tensile and bending, the initial damage occurred in the ABS layers. As a result, it was observed that the reinforcement of ABS with woven Kevlar/epoxy composite layers significantly increased both rigidity and strength.