Yazar "Syamsir, Agusril" seçeneğine göre listele

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    Buckling Analysis of CNT-Reinforced Polymer Composite Beam Using Experimental and Analytical Methods
    (Mdpi, 2023) Madenci, Emrah; Ozkilic, Yasin Onuralp; Aksoylu, Ceyhun; Asyraf, Muhammad Rizal Muhammad; Syamsir, Agusril; Supian, Abu Bakar Mohd; Mamaev, Nicolay
    The aim of this article was to investigate the effect of carbon nanotubes (CNTs) on the buckling behavior of fiber-reinforced polymer (FRP) composites. The materials used included three layers: carbon-fiber-reinforced polymer (CFRP), epoxy and CNTs. A set of mechanical tests, such as compression and buckling tests, was performed, and also analytical solutions were developed. Damage analysis was also carried out by controlling the damage initiation and crack progression on the composite samples. Experimental results revealed that using 0.3% with CNT additives enhanced the buckling performance of the composite. Finally, the average load-carrying capacity for the clamped-clamped boundary condition was 268% higher in the CNT samples and 282% higher in the NEAT samples compared to the simple-simple condition.
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    Experimental and Analytical Investigation of Flexural Behavior of Carbon Nanotube Reinforced Textile Based Composites
    (Mdpi, 2023) Madenci, Emrah; Ozkilic, Yasin Onuralp; Aksoylu, Ceyhun; Asyraf, Muhammad Rizal Muhammad; Syamsir, Agusril; Supian, Abu Bakar Mohd; Elizaveta, Bobrynina
    In this study, the main goal of this study was to understand the effect of carbon nanotube (CNT) additives on the elastic behaviors of textile-based composites. The materials have three phases: carbon fiber fabric, epoxy matrix, and carbon nanotubes. Different weight fractions of CNTs were used (0% as a reference, 0.3%). Mechanical tests were performed, such as tension and three-point bending beam tests. In addition, the composite material damages were examined in detail. The experimental results show that the samples with CNT carried 9% and 23% more axial tensile force and bending capacity on average than those with NEAT. Besides, it was understood that adding 0.3% by weight of MWCNT increases the tensile modulus by approximately 9%. Finally, the mechanical tensile and bending tests are supported by analytical solutions successfully applied in the literature.
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    Investigating the Influence of Stacking Sequences on the Physical and Mechanical Characteristics of Coconut Coir Fiber-Reinforced Unsaturated Polyester Composites
    (Korean Fiber Soc, 2024) Asyraf, M. R. M.; Syamsir, Agusril; Supian, A. B. M.; Zaki, M. A. F. M.; Hazrati, K. Z.; Ashraf, W.; Anggraini, Vivi
    The coconut fruit is cultivated for fruit in tropical countries, whereas its husk and shell are a potential source of natural fiber, which is mostly disposed of as waste material. There is an increasing trend in research and innovation to replace synthetic fiber with natural fiber to reduce the environmental carbon footprint. However, using natural fiber in polymer composite is challenging because of the lower mechanical strength and hydrophilic nature of the natural fiber. The literature reported on mechanical and moisture resistance properties of coir fiber polymer composite with different fiber orientations is very limited. Thus, this research aims to evaluate the mechanical properties (flexural and impact) and moisture resistance properties of the coir fiber reinforced composite. The fiber ware stacked with three different fiber orientations, namely 0 degrees/0 degrees/0 degrees, 0 degrees/90 degrees/0 degrees and 0 degrees/+ 45 degrees/0 degrees. The composite was fabricated with the hand lay-up technique. The overall results indicated that the composite specimens with the orientation of 0 degrees/0 degrees/0 degrees indicated the best flexural properties and water penetration resistance in the composite. The stacking sequence of 0 degrees/ + 45 degrees/0 degrees gave the best impact properties. However, at this orientation, it gave the lowest water resistance among the studied configurations.
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    Recent Advances of GFRP Composite Cross Arms in Energy Transmission Tower: A Short Review on Design Improvements and Mechanical Properties
    (Mdpi, 2023) Syamsir, Agusril; Ean, Lee-Woen; Asyraf, Muhammad Rizal Muhammad; Supian, Abu Bakar Mohd; Madenci, Emrah; Ozkilic, Yasin Onuralp; Aksoylu, Ceyhun
    Currently, pultruded glass fibre-reinforced polymer (pGFRP) composites have been extensively applied as cross-arm structures in latticed transmission towers. These materials were chosen for their high strength-to-weight ratio and lightweight characteristics. Nevertheless, several researchers have discovered that several existing composite cross arms can decline in performance, which leads to composite failure due to creep, torsional movement, buckling, moisture, significant temperature change, and other environmental factors. This leads to the composite structure experiencing a reduced service life. To resolve this problem, several researchers have proposed to implement composite cross arms with sleeve installation, an addition of bracing systems, and the inclusion of pGFRP composite beams with the core structure in order to have a sustainable composite structure. The aforementioned improvements in these composite structures provide superior performance under mechanical duress by having better stiffness, superiority in flexural behaviour, enhanced energy absorption, and improved load-carrying capacity. Even though there is a deficiency in the previous literature on this matter, several established works on the enhancement of composite cross-arm structures and beams have been applied. Thus, this review articles delivers on a state-of-the-art review on the design improvement and mechanical properties of composite cross-arm structures in experimental and computational simulation approaches.