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The present study is concerned with a method for producing a reinforced polymer by introducing Carbon Nanotube into the polymeric host. It aims to investigate the tensile characteristics of Multiwall Carbon Nanotubes (MWCNTs) reinforced epoxy composites. Tensile test specimens of the composite were fabricated by increasing concentration of surface...
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... diagram of dog bone shape tensile specimen shown in Fig.3. Tensile test of epoxy/MWCNTs specimens after polishing is shown in Fig.4 were tested at room temperature 33°C and RH 47% at a constant cross head of 1mm/min in universal testing machine (UTM)[ PMT 1C] Fig.5. The machine is connected with data acquisition system as per ASTM standard E 1856 and the hardware unit to initialize the parameter of loading rate, gauge length, width and thickness of the specimen. ...
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... It provides details about graphs for flexural stress, strain, Fig. 4 Schematic representation of tensile test setup [153] stress, and modulus. The schematic diagram of three-point flexural testing is shown in Fig. 5. ...
This study explores the reinforcement of foreign materials (fibers/particles) in polymeric composites, aiming to improve structural characteristics under variable loads. The article critically reviews experimental techniques for composite fabrication, computational modelling, and analysis. It also offers a detailed examination of mechanical properties, manufacturing defects, and applications associated with these composites. Hybrid composites (HC) are highlighted for their exceptional potential across various engineering applications, demonstrating enhanced structural attributes without imposing a weight penalty or surpassing the parent structure’s overall weight. The review explores into the influences of multiple defects, surface treatment, and other parameters affecting the structural integrity of HC during fabrication and application. Furthermore, the article provides a comprehensive understanding, including HC classifications, benefits, and limitations.
... The epoxy/MWCNT nanocomposites is a very vital research area and attracted many researchers, e.g. Zhou et al. [4], Liu et al. [14], Sabarina than et al. [15], Martone et al. [16], Gouda et al. [17], and Shokrieh et al. [18]. ...
The physical, the thermal and the mechanical properties of Nano-composites, that consisted of Polyprime EP epoxy that reinforced by multi-walled carbon nanotubes (MWCNTs), have been studied. Various loading ratios, 0.1, 0.5, and 1 wt. %of MWCNT shave been infused into epoxy by a magnetic stirrer and then the hardener mixed with the mthat supplied with the epoxy. All sample shave been cutting using CNC machine. Tensile test, three-point bending, hardness tests, lee's disk, differential scanning calorimetry, water absorption and dielectric and electrical conductivity test were utilized on unfilled, MWCNT-filled epoxy to identify the loading effect on the properties of materials. Scanning electron microscopy (SEM) was used to determine the dispersion case of nanotubes in the base matrix. The tensile test results showed an improvement in Young’s modulus with higher MWCNT addition percentages. The highest value of the tensile strength was obtained at 0.5 wt.% of MWCNT with increasing ratio 66.7%. The values of the Shore D hardness tests are slightly increases as the filler percentage increased, and the maximum value was observed at MWCNT weight percent of 4.4. Images of SEM showed that the specimen of 0.1 wt.% MWCNT has less voids as compared with other specimen. Thermal conductivity and glass transition temperature increase when the loading ratio increased the maximum increasing at 1wt% with 120% and 23% respectively. The true density and electrical conductivity increase when nano carbon infused but decreasing in the dielectric constant and water absorber.
We live in a period where machines have become a fundamental piece of our day-to-day existence. These machines that surround us largely depend on human assistance. To operate them, a human would nearly have to be functional. We only lose the capacity to engage with machines when these capabilities are hindered, possibly by a bodily condition or injury. This study picks the Universal Testing Machine as the machine to be operated to help physically challenged people run machinery. Additionally, it uses an Internet of Things architecture to monitor specific brain activities in the person’s brain, while controlling the machine.Index TermsElectroencephalogramBrain Computer InterfaceIoTMQTTESP32Node-REDEmotiv EPOC+UTM
Komposit serat alam adalah material yang sangat baik karena sangat ringan, kuat, murah, mudah di bentuk dan ramah lingkungan. Pohon gaharu (Aquilaria malaccensis) menghasilkan resin berbau harum untuk pembuatan parfum. Selain resin juga menghasilkan serat halus yang bisa dijadikan penguat material komposit. Tujuan penelitian untuk mendapatkan efek perendaman serat kulit gaharu terhadap pengujian mekanik menggunakan matriks polyester BQTN 157 serat gaharu sebagai penguat dan apakah komposit serat gaharu ini bisa dijadikan bahan alternatif pembuatan dashboart mobil. Metode penelitian menggunakan full Faktorial dengan dua faktor dan tiga level. Parameter proses yaitu perendaman dengan cairan kimia NaOH 2%, 4% dan 6% dan lama perendaman 120 menit, 240 menit dan 360 menit. Hasilnya nilai rata-rata kekuatan tarik maksimum yaitu 42,0 Mpa pada serat dengan waktu perendaman selama 120 menit dan 2% NaOH. Hasil pengujian impak maksimum sebesar 39,1 kj/m2 pada waktu perendaman 120 menit dan persentase NaOH 4%. Hasil foto menghasilkan bentuk patahan broken fiber dimana serat yang patah dipenuhi dengan serat halus dan berserabut. Efek persentase NaOH dan perendaman serat gaharu lebih dari 240 menit membuat kekuatan serat menjadi menurun, mudah putus dan rapuh. Artinya persentase NaOH dan perendaman tidak boleh lebih dari 240 menit. Hasil pengujian ini bisa dijadikan material baru untuk pembuatan dashboard mobil karena sudah standar bila dibandingkan dengan standar.
Natural fibre composites are ideal material substitutes for combating the issues of pollution and non-biodegradability. Several industries, the automobile industry, in particular, have shown tremendous inclination towards the usage of natural fibre composites in their deliverables. Besides providing a wide array of useful properties, natural fibre composites have offered flexibility in terms of choosing various combinations of fibres and resins. Owing to this, this paper aims to collect data and categorize the natural fibre composites based on the types of treatments and properties they exhibit. Characterization was done by taking into consideration chemical and enzymatic treatments as well as tests such as the tensile, flexural, compressive, impact, shear and hardness. Based on the values obtained from the characterization, the paper suggests suitable and feasible natural fibre composites as biocompatible replacements to conventionally used materials in the automotive industry.
Proses pembuatan kapal sangat dipengaruhi oleh kekuatan bahan terutama material penyusunnya. Bahan material dibentuk dengan menyesuaikan design kapal, melalui pembentukan pada lengkungan kapal. Kelayakan suatu kapal dapat diketahui dengan melakukan pengujian keuletan, kekerasan, kegetasan, elastisitasnya, dan dari segi lainnya. Pengujian tersebut yaitu Uji Bending, uji lengkung (bending test) merupakan salah satu bentuk pengujian untuk menentukan mutu suatu material secara visual. Spesimen berupa material plat kapal Tanker 3500 LTDW HN. 309 dilas sesuai dengan prosedur WPS dengan bevel 300 untuk dilakukan proses uji bending. Hasil uji bending menunjukkan beban maksimal terbesar didapat pada spesimen uji no. 2 (Root) yaitu sebesar 3,42 kN dan beban terkecil spesimen uji no. 1 (Face) yaitu sebesar 3,07 kN. Kekuatan uji bending terbesar didapat pada spesimen uji no. 2 (Root) yaitu sebesar 1,10 kN/mm2 dan yang terkecil spesimen uji no. 1 (Face) yaitu sebesar 0,95 kN/mm2. Kekuatan pengujian bending rata-rata dari kedua spesimen uji adalah 12,34 kN/mm2. Hasil uji bending dilihat secara visual tidak memiliki adanya cacat las (defect) dan daat diaplikasikan pada pembangunan kapal.
