Yazar "Abdulwahab, Mohamad" seçeneğine göre listele

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    Öğe
    Effect of polyurea coating on the mechanical properties of aluminum foam and additive manufactured specimens
    (Altınbaş Üniversitesi, 2021) Abdulwahab, Mohamad; Türksoy, Armin
    Samples were coated with 3 different types of polyurea with various properties. Tensile and bending tests were applied to monitor the change in the mechanical properties (Ultimate Tensile Strength, Strain at UTS, Ductility, Maximum flexure Load, and Toughness) of the samples after applying the polyurea coating. Polyurea coating had resulted in a significant increment in the aluminum foam ultimate tensile stress, ductility, and fracture toughness. On the other hand, Polyurea coated PLA samples witnessed some issues due to high spraying temperature which resulted in a decrease in the ultimate tensile strength of the sample because of PLA’s glass transition temperature. but the elongation, ductility, and fracture toughness of the samples have remarkably increased. In this study, the effect of different polyurea coats on aluminum foam and PLA 3D printed samples was established due to the importance of both materials in current industries, many studies focus on improving and aiding the performance of such useful materials in order to fit in further applications.
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    Öğe
    Effects of polyurea coating on the elastoplastic behavior of additively manufactured PLA specimens
    (Springernature, 2022) Abdulwahab, Mohamad; Bijanzad, Armin; Khan, Shaheryar A.; Lazoglu, Ismail
    The fused Filament fabrication method gained its popularity in the additive manufacturing industry not only because of the low capital and manufacturing cost, but also due to its ease of production approach, availability, and mobility of the method. However, the quality of final parts and the mechanical properties are directly related to layer thickness, resolution, filament raw material, and working temperature. Thermoplastic materials, especially polylactic acid (PLA), are widely used considering their low melting temperature, lower requirement of post-processing, and sustainability. However, poor mechanical properties, layer delamination, and low ductility are the main drawbacks of these materials. This work aims to study the effects of polyurea as an elastomeric coating on PLA printed specimens. Three geometrical configurations were prepared, and tensile properties of coated and uncoated samples are investigated using stress-strain curves. It has been shown that hot polyurea coating results in a reduction in the ultimate tensile strength (UTS) of specimens. However, it increases ductility and elongation performance of the samples remarkably. In addition, the elasticity modulus and elastoplastic behavior of the specimens are modeled mathematically.