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Jurnal Polimesin
Published by Politeknik Negeri Lhokseumawe
ISSN : 16935462     EISSN : 25491199     DOI : http://dx.doi.org/10.30811/jpl
Core Subject : Science, Engineering,
Automotive Engineering Control & Systems Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering
Polimesin mostly publishes studies in the core areas of mechanical engineering, such as energy conversion, machine and mechanism design, and manufacturing technology. As science and technology develop rapidly in combination with other disciplines such as electrical, Polimesin also adapts to new facts by accepting manuscripts in mechatronics. In Biomechanics, Mechanical study in musculoskeletal and bio-tissue has been widely recognized to help better life quality for disabled people and physical rehabilitation work. Such a wide range of Polimesin could be published, but it still has criteria to apply mechanical systems and principles. Exceeding the limitation has been a common reason for rejection by those outside the scope. Using chemical principles more than mechanical ones in material engineering has been a common reason for rejection after submission. Excessive exploration of the management within the discipline of Industrial Engineering in the manufacturing technology scope is also unacceptable. The sub-scope biomechanics that focuses on ergonomics and does not study movement involving applied force on the bio-tissue is also not suitable for submission.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 503 Documents
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Simulation and Experimental Evaluation of Tensile Properties and Macrostructure Changed of 3D printer PLA Filaments Syaharuddin Rasyid; Rusdi Nur; Muas Muchtar
Jurnal POLIMESIN Vol 20, No 2 (2022): August
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v20i2.2929

Abstract

The use of printing products with 3D printing has been widely used in everyday life, but research regarding its strength and performance is still limited. Therefore, simulation and experimental approaches are used in this paper to analyze the characteristics of PLA+ materials produced by 3D printers. a. Design tensile test specimens and static stress tests in Autodesk Fusion360; b. Calculate the weight of the tensile test specimen; c. Print tensile test specimens with variations in infill (60, 80, and 100%) and print direction (0, 45, and 90 deg); and d. Experiment with macrostructure, weight, and tensile tests. The conclusions of this study are; a. PLA+ material properties (macrostructure, weight, tensile strength, tensile strain) have been obtained experimentally and through simulation, b. The tensile strength of the simulated PLA+ material is higher than the experimental test results, c. The level of density (infill), affects the weight and tensile strength, and d. The direction of the impression affects the tensile strength, but weight and tensile strain have no effect.
Influence of Indium Tin Oxide (ITO) poling temperature in vacuum on surface roughness of Polyvinylidene Fluoride(PVDF) film Suprapto, Suprapto; Lisyanto, Lisyanto; Eswanto, Eswanto; Riadi, Selamat; Gunawan, Safri; Iskandar, Henry; Jubaidah, Jubaidah; Muhtadin, Muhtadin
Jurnal Polimesin Vol 21, No 6 (2023): December
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i6.4454

Abstract

The surface roughness is a significant parameter of the performance of PVDF thin film sensors. In this work, we have investigated the effect of ITO poling in vacuum at various temperature on the surface roughness of uniaxially stretched PVDF film. The influence of poling temperature on the surface roughness of PVDF film was examined using atomic force microscopy (AFM). In this work, the AFM data are obtained through the database, and topography is analyzed using Gwydion Software (GS). GS has characterized surface roughness in terms of Average Roughness (Ra), Root Mean Square (Rrms), and Arithmetic average height (Rz). The results show that the GS can detect and measure profile thickness and roughness on a nanoscale with reliable accuracy. The results confirm that the increased poling temperature can reduce the roughness of the surface.
Rancang bangun perkakas penarik bantalan perseneling Mawardi Mawardi; Indra Mawardi; Zaini AK
Jurnal POLIMESIN Vol 1, No 1 (2003): Agustus
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jop.v1i1.1395

Abstract

Low-carbon steel fatigue behavior after pack carburizing with buffalo bone charcoal and barium carbonate media Bontong, Yafet; Rante, Milka; Nitha, Nitha
Jurnal Polimesin Vol 22, No 2 (2024): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i2.4596

Abstract

The pack carburizing method is a technique that can be employed to enhance the surface hardness of Low-Carbon Steel (LCS). This method can potentially improve the hardness of the material while maintaining its strength. This study aims to investigate how different carburizing media, specifically varying percentages of Buffalo Bone Charcoal (BBC) powder as a carbon source, impact the mechanical properties of LCS. The temperature in the carburizing process ranges from 850°C and 950°C while maintaining a holding time of 2 hours. The carbon derived from buffalo bone charcoal is finely ground and mixed with barium carbonate (BaCO3) as the energizer during this process. This study used different ratios of BBC powder and BaCO3 as carburizing mediums. The ratios tested were 60% BBC + 40% BaCO3, 70% BBC + 30% BaCO3, and 80% BBC + 20% BaCO3, based on the weight of the BBC powder used in the carburizing process. The steel will be combined with BaCO3 and powdered BBC for this research. Next, the fatigue test was examined. BBC in the pack carburizing process increases LCS carbon content by 0.735% from 0.268%. This change alters the steel's microstructure, possibly increasing its hardness and wear resistance. The direct link between BBC concentration and LCS carbon enrichment shows the process's efficiency. Pack carburizing also improves LCS fatigue strength. This improvement is due to higher BBC concentration, smaller carburizing medium particles, and higher processing temperatures. After carburizing, the LCS can resist 36,625 to 61,435 cycles.
Pengolahan produk pasca panen hasil perikanan di Aceh menggunakan teknologi tepat guna Faisal Amir; Jumadi Jumadi
Jurnal POLIMESIN Vol 14, No 2 (2016): Agustus
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v14i2.336

Abstract

Proses pengawetan ikan biasanya dilakukan dengan pengeringan. Proses pengeringan dilakukan dengan dua cara yaitu pengeringan alamiah dan pengeringan dengan menggunakan peralatan. Pengeringan alamiah atau dengan cara penjemuran langsung dari panas matahari masih mempunyai kelemahan-kelemahan, sehingga perlu kajian dan pengembangan terhadap sistem dan teknologi pengeringan. Pada kajian ini penulis melakukan penerapan teknologi dan peralatan pengeringan ikan dengan menggunakan bahan bahan bakar minyak tanah sebagai sumber energi panas. Peralatan pengering ini terdiri dari beberapa bagian utama yaitu ruang pembakaran, saluran udara panas, ruang pengering dan cerobong. Dari hasil penelitian distribusi tamperatur dalam ruang pengering sesudah memasukkan adalah 60-650 C dalam waktu pengeringan 360 menit. Berat ikan sebelum dikeringkan 100 kg dan sesudah dikeringkan menjadi 65,29 kg, bahan bakar yang di perlukan adalah 6.4 kg. Kadar air pengeringan ikan kayu dengan menggunakan bahan bakar gas mendapatkan kadar air akhir paling rendah yaitu sebesar 11,43 % sedangkan yang menggunakan bahan bakar minyak tanah 11,84% mendapat kadar air bahan bakar kayu mendapat kadar air paling tinggi yaitu sebesar 12,75 %.Kata kunci: peralatan, distribusi temperatur, proses pengeringan.
Analisis elemen hingga untuk siklus berjalan pada model prostetik lentur pergelangan kaki Zakki Fuadi Emzain; Utsman Syah Amrullah; AM. Mufarrih
Jurnal POLIMESIN Vol 18, No 2 (2020): Agustus
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v18i2.1922

Abstract

The model of compliant prosthetic ankle-foot is proposed as an alternative prosthetic aid for people with disabilities to do activities. The model is designed and analyzed to determine its strength and feasibility before being fabricated. The two main stages in this research are model design and model analysis. The shape of the model was designed with several elastic cavities and arches using the concept of a compliant mechanism. Finite element analysis (FEA) was performed on the prosthetic model when the stance phase on the mechanism of the human gait cycle. Because the prosthetic foot area is in contact with the ground on this cycle phase. Three main positions in 0-64% of the gait cycle are heel strike, midstance, and toe-off positions used as boundary conditions. The amount of load given adjusts the bodyweight percentage of the gait cycle with a reference of 80 kg. The direction of loading was by following the angle of the foot when dorsiflexion to plantarflexion during the stance phase. The biggest deformation results occurred in the toe-off position with two peak cycles of 4.69 mm and 4.45 mm at 17% and 51% of the gait cycle. While the smallest deformation occurred in the midstance position with an average of 0.08 mm. Because it used fixed support with two pedestals on the soles of the prosthetic. Maximum stress occurred in the toe-off position of 16.45 MPa at 17% of the gait cycle. With a safety factor of 1.63, the value is still safe because it is below the yield strength value of ABS material. While the largest strain of energy was located in the lower area in the middle of the arch between the toe and sole foot in the toe-off position of 3.55 mJ.
Implementation of fuzzy logic control for the automation of diesel engine cooling systems Randis Randis; Sri Susilawati Islam; Nur yanti; Novita Novita
Jurnal POLIMESIN Vol 21, No 2 (2023): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i2.3359

Abstract

Conventional cooling systems on four-wheeled vehicles generally use a cooling fan driven by the crankshaft through pulleys and a belt (V-belt), causing the wastage of fuel in the vehicle. This study aims to design and implement fuzzy logic control on a prototype of an automatic cooling system for a diesel engine. The tool's design uses the experimental method, uses Arduino as a microcontroller that functions as a data processing center, with inputs of two temperature sensors and a DC motor as output to rotate the fan, and fuzzy logic control methods as an automatic control system. The research results show that this tool can operate automatically according to the engine temperature, so it is expected to produce greater effectiveness and efficiency. Measurements on each component have been carried out and show satisfactory results, testing on the temperature sensor shows a small error. Comprehensive testing of the tool shows good performance, including the PWM output to adjust the rotational speed of the fan motor so that the system can be used properly. This research will help create a prototype of an automatic cooling system for a diesel engine cooling system so that it can be developed to reveal better fuel efficiency in the future.
A study on optimal parameter combinations for austempered ductile iron Oktadinata, Herry; Purnama, Dewin; Hamzah, Rizal Nurdian; Apriyan, Agung Slamet
Jurnal Polimesin Vol 22, No 3 (2024): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i3.5001

Abstract

Nodular cast iron possesses a spherical graphite shape and exhibits mechanical properties closely resembling those of steel after heat treatment. The austempering method provides a means of enhancing the mechanical properties of nodular cast iron. This study aimed to investigate the optimal parameter combinations for Austempered Ductile Iron (ADI). The experiments involved varying the austenitization temperature and austempering time. Multiple tests were conducted to analyze the effects of austenitization temperature and tempering time on the microstructure, hardness, and impact toughness. The experimental samples were obtained from Y-block nodular cast iron austenitized at 850, 900, and 950°C for 90 min in an electric furnace. Subsequently, they were quenched in a salt bath at a temperature of 350°C and held for 60, 90, and 120 minutes before being cooled to room temperature. Mechanical tests and microstructure observations were performed on both the as-cast sample and after austempering. The microstructure was observed using an optical microscope before and after the etching. The research findings indicated that austempering increases the hardness and impact toughness of nodular cast iron. The highest hardness (46.8 HRC) was achieved from a parameter combination of an austenitization temperature of 850°C and an austempering time of 90 minutes. This particular sample also exhibited a relatively higher impact energy (3.8 J) compared to the others. The results of this study suggest that the austenitization temperature and tempering time exert an influence on the mechanical properties.
Analisa pengaruh perlakuan alkalisasi dan hydrogen peroksida terhadap kekuatan mekanik komposit serat sabut kelapa bermatriks epoxy Zulkifli Zulkifli; Ida Bagus Dharmawan
Jurnal POLIMESIN Vol 17, No 1 (2019): Februari
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v17i1.844

Abstract

Komposit polimer dengan serat alam sangat  ramah lingkungan  karena  mampu  terdegradasi secara alami dan juga harga serat alam pun  lebih  murah  dibandingkan  bahan serat sintetis. Penelitian ini bertujuan untuk mengetahui pengaruh perlakuan NaOH pada serat sabut kelapa terhadap kekuatan mekanik material komposit yang diperkuat serat sabut kelapa. Adapun tahapan pada penelitian ini yaitu (1) perendaman serat sabut kelapa pada larutan NaOH dengan konsentrasi 10%, 15%, dan 20%, selama 2 jam, (2) mencuci serat sabut kelapa yang telah direndam dengan menggunakan larutan H2O2 dengan konsentrasi 3% selama 1 jam, (3) serat sabut kelapa dikeringkan di dalam kamar pada temperature kamar sekitar 300C selama 7 hari, (4) pembuatan material komposit dengan metode press molding, (5) melakukan pengujian tarik sesuai standar ASTM D-638. Hasil dari penilitian ini yaitu pengaruh perlakuan NaOH dengan konsentrasi larutan 15% pada serat sabut kelapa menunjukkan nilai tegangan tarik yang paling optimal yaitu sebesar 23.497 MPa dan nilai regangannya sebesar 3.918% pada material komposit, hal ini disebabkan oleh ikatan interface antara serat dan matrik menjadi lebih kuat sehingga tegangan dapat terjadi secara merata, sebelum terjadi patah pada material komposit. Kata kunci:  komposit, serat sabut kelapa, NaOH, H2O2, kekuatan mekanik. AbstractComposite polymers with natural fibers are very environmentally friendly because they can be degraded naturally and also the price of natural fibers is cheaper than synthetic fiber. This study aims to determine the effect of NaOH treatment on coconut fiber on the mechanical strength of coco fiber reinforced composite materials. The stages in this study are (1) soaking coco fiber in NaOH solution with a concentration of 10%, 15%, and 20%, for 2 hours, (2) washing coconut coir fibers that have been soaked using H2O2 solution with a concentration of 3% for 1 hour, (3) coconut coir fibers are dried in the room at room temperature around 300 C for 7 days, (4) making composite materials using the press molding method, (5) carrying out tensile testing according to ASTM D-638 standard. The results of this research are the effect of NaOH treatment with a concentration of 15% solution on coconut fiber shows the most optimal tensile strength of 23,497 MPa and the strain value is 3,918% in composite materials, this is due to the bonding between fibers and matrices strong so that stress can occur evenly, before a composite material breaks. Keywords: composite, coconut fiber, NaOH, H2O2, tensile strength.
Pengaruh iradiasi dan temperatur terhadap efisiensi daya keluaran pada pemodelan photovoltaic Canadian solar 270 Wp Mochammad Iedvan Maulana; Viktor Naubnome; Jojo Sumarjo
Jurnal POLIMESIN Vol 19, No 2 (2021): Agustus
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v19i2.2286

Abstract

Matahari sebagai sumber energi yang tidak terbatas sangat menguntungkan terhadap Indonesia dengan letak astronomis yang berada digaris khatulistiwa dan beriklim tropis. Dengan memiliki iklim tropis (musim hujan dan kemarau) mengakibatkan penyinaran energi radiasi lebih kurang 12 jam menjadikan Indonesia cukup untuk memanfaatkan PLTS sebagai sumber energi pengganti. Pemanfaatan Pembangkit Listrik Tenaga Surya ini salah satunya adalah dengan teknologi yang disebut Panel Surya atau Photovoltaic. Berbeda dengan Negara 4 musim, Indonesia memiliki nilai temperatur lingkungan rata-rata lebih tinggi dan Iradiasi yang berubah-ubah. Tujuan Penelitian ini adalah untuk memodelkan dan menganalisa lebih lanjut hubungan antara pengaruh Iradiasi dan temperatur terhadap efisiensi dan daya keluaran serta daya optimum rata-rata yang dapat dihasilkan panel surya sehingga penempatan photovoltaic dapat dimanfaatkan sesuai dengan kondisi Iradiasi dan temperatur disekitarnya. Berdasarkan hasil simulasi pemodelan menunjukan Daya keluaran maksimum yang dihasilkan Photovoltaic Canadian Solar CS6K-270 Wp berbanding lurus secara signifikan dengan iradiasi matahari, Pada saat iradiasi tertinggi sebesar 876,11 W/m², daya keluaran yang dihasilkan pun tinggi sebesar 214,35 Watt, namun perubahan temperature terhadap daya keluaran selama 7 hari cenderung fluktuatif. Pada saat temperature tinggi sebesar 32,7°C daya keluaran yang dihasilkan kurang maksimal yaitu sebesar  202,21 Watt. Sedangkan Nilai Efisiensi Photovoltaic Canadian Solar CS6K-270 Wp berbanding terbalik dengan iradiasi. Pada saat Iradiasi tertinggi dan bersifat fluktuatif mengakibatkan penurunan Nilai Efisiensi yang signifikan bernilai 16,11% - 16,09 %, sedangkan pengaruh temperatur yang signifikan mengakibatkan Nilai Efisiensi menurun namun tidak terlalu drastis

Page 23 of 51 | Total Record : 503

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