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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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Pengaruh pemanasan terhadap sifat-sifat fisika tanah gambut Nur laili
Jurnal POLIMESIN Vol 7, No 1 (2009): Februari
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jp.v7i1.1347

Abstract

Tanah gambut di Indonesia seluruhnya ditaksir mencapai 16-27,7 juta ha yang tersebar sebagian besar di kepulauan Sumatera, Kalimantan, Jawa/bali, Maluku/Nusa Tenggara dan Irian Jaya. Tanah gambut di Indonesia umumnya mendominasi wilayah sepanjang pantai, serta belum ada diperoleh data yang jelas mengenai jumlah luas tanah gambut atas dasar bahan asal, cara pembentukan, jenis pelapukan dan ketebalan bahan organiknya. Metode penelitian yang dilakukan adalah metode pemanasan sample tanah dalam muffle furnance selama 1 jam dengan temperature 25” (control), 175"C (Dehidrasi sempurna dari sample), 325”C (Dehidrasi dari bentuk gel0, 475 (Pembakaran bahan organic). Hasil dari pemanasan ini dimasukkan dalam analisa Statistik rancangan acak lengkak (RAL). Hasil penelitian menunjukkan bahwa warna tanah hitam menjadi hitam mereahan pada pemanasan 475"C, porositas tanahnya sebesar 93,71”6 sehingga porositas tanah gambut yang besar akan memberikan peluang air untuk lolos besar. Kerapatan lindaknya memberikan pengaruh yang nyata berdasarkan analisa sidik ragam suhu semakin tinggi, kerapatan lindak yang diperoleh nilainya semakin kecil sekitar 0,09 gr/cm' pada suhu 475'C. Kandungan C- organik tanahnya memberikan pengaruh yang nyata pada pemanasan 475"C sebesar 5,5096 yaitu tanah mengalami penurunan yang sangat besar saat pembakaran bahan dan kemasaman tanahnya, semakin tinggi suhu yang diberikan maka Ph tanah tinggi dan tingkat kemasaman tanah rendah.Kata kunci : Tanah gambut, warna tanah, kerapatan lindak, porositas tanah, C-organik tanah, PH.
Production Monitoring System Using Overall Equipment Effectiveness (OEE) Method to Improve Stamping Machine Performance Gun Gun Maulana
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.v20i2.2560

Abstract

One of the factors that support success in the manufacturing industry is the smoothness of the production process. There are six factors that affect engine performance, known as the Six Big Loss. Six significant losses are the cause of production equipment not operating normally, namely: start-up loss, set up or adjustment loss, cycle time losses, speed loss, breakdown loss and defect loss. Downtime that often occurs results in decreased productivity, and production results do not reach the target. Production machine downtime is often not known by some parties, especially superiors positions such as managers, section heads and maintenance division. The goal to be achieved in this research is to design and realize a performance monitoring system for a stamping machine based on the internet of things (IOT) to increase the effectiveness of the machine with the optimal amount of production. The method used to determine machine performance is Overall Equipment Effectiveness (OEE). OEE is one of the methods available in TPM or Total Productive Maintenance. The study results show that machine downtime notifications are informed quickly using an alarm system.
Effect of Speed and Turning Time Pulley on the Quantity and Quality of Output Multipurpose Chopper Machine Sari, Kartika; Sunardi, Sunardi; muwaffaq, Abiyyu Sayyid; Aminuddin, Jamrud; Khoryanton, Ampala; Warso, Warso; Budi Utomo, Agung Bambang
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.v21i6.4098

Abstract

Variation of pulley rotational speed on the yield and cut of the multipurpose chopper aims to determine the optimum quality and quantity of chopping results. Testing using cassava and bananas. The diameter of the pulley used is 2 inches and the driven pulley is 6, 7, and 10 inches with a pulley speed of 467, 400, and 275 rpm. The result of bananas shows that the average chopping was 573, 864, and 864 grams, respectively with the spin pulley time being 46, 90, and 59 seconds. Meanwhile, for cassava, the results of chopping were 984, 995, and 823 grams, respectively with the spin pulley time being 23, 59, and 35 seconds, respectively. The optimum chopping quality for bananas used a pulley diameter of 10 inches and an optimum rotation time was 59 seconds. The optimum slicing quality for cassava uses a pulley diameter of 7 inches with an optimum rotation time was 59 seconds. The conclusion is that the diameter of the pulley affects the thickness of the sample, the time and speed of the pulley rotation, and the quality of the chopping results.
Nilai kalor pada kulit tanduk kopi sebagai pengganti arang bahan bakar Sariyusda Sariyusda
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.v1i1.1389

Abstract

Kulit tanduk kopi sebagai limbah dan pertanian kopi dimaksudkan untuk mendapatkan alternative bahan bakar arang dalam bentuk briket dengan tetes tebu (molasses) sebagai pengikat (binder) dengan nilai brix 62%. Bahan baku taduk kopi dikarbonisasikan dalam oven pada suhu 500°C hingga proses karbonisasi telah terjadi Arang kulit tanduk kopi dihaluskan dengan menggunakan cruser hingga berbentuk bubuk lalu disaring dengan ayakan 35 mesh. Bahan baku berupa bubuk kulit tanduk kopi dicampur dengan tetes tebu dengan perbandingan tertentu, lalu campuran bubuk arang kulit tanduk kopi dengan fetes tebu dicetak dengan cetakan yang  berukuran 25 x 25 x 50mm, kemudian briket arang tanduk kopi ini dikeringkan dalam oven pada suhu 100°C selama 2 jam. Briket arang tanduk kopi kemudian diukur kekuatan tekan dan nilai kalorinya.Kata Kunci : Molasses, binder, Derajat kebebasan, briket.
The Simulation Of Drop-Weight Impact Test On Ramie-Eglass Hybrid Fiber Composite For Jaloe Kayoh Wall Material Tamlicha, akram; Rizal, Samsul; Hasanuddin, Iskandar; Noor, Muhamad Mat; Ikramullah, Ikramullah; Nazaruddin, Nazaruddin
Jurnal Polimesin Vol 22, No 1 (2024): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i1.4645

Abstract

The purpose of this study is to simulate drop-weight impact tests on hybrid fibre composites made of ramie and Eglass, which are used to make the traditional Acehnese boat wall material for jaloe kayoh. Using composites of ramie-Eglass fiber hybrid in the construction of jaloe kayoh wall material will significantly enhance the strength, durability, and sustainability of traditional Acehnese boats. The simulation was carried out using the finite element method approach using the Abaqus software. Three distinct laminate layer configurations—three layers (GRG), five layers (GRGRG), and six layers (GRGGRG)—with alternating Eglass and ramie fibres make up the test specimens. The ends of the specimen are set with fixed support to ensure boundary conditions, which limit all active structural degrees of freedom on all sides of the specimen. According to simulation results, the specimen with six laminate layers, measuring 12.498 mm, had the largest displacement. The specimen with six laminate layers has the highest stress concentration, measured at 560.6 MPa, while the specimen with three layers has the highest strain concentration, measured at 0.023. Its indicating that the lamina variation can influence the structural performance of the jaloe kayoh material. This research contributes to understanding the potential of ramie-Eglass hybrid fiber composites to enhance the safety and durability of traditional vessels such as jaloe kayoh. The implications of the results can serve as a foundation for the development of superior structural materials in the future.
Penguatan kayu dan plywood melalui proses sandwich dengan komposit polyester serat gelas untuk bahan pembuatan perahu Azwar Azwar; Ady Saputra Ismy; Saifuddin Saifuddin
Jurnal POLIMESIN Vol 14, No 1 (2016): Februari
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v14i1.296

Abstract

Keterbatasan kayu berkualitas untuk pembuatan perahu nelayan menyebabkan harga perahu meningkat dan kualitasnya menurun sehingga berimbas pada nalayan tradisional. Penurunan kualitas perahu salah satunya disebabkan oleh proses pelapukan kayu akibat terendam air dan terpampang terhadap sinar matahari pada jangka waktu yang lama. Maka proses pelapukan tersebut dapat diminimalisir melalui proteksi kayu dari kontak langsung dengan air atau matahari yang dengan lapisan komposit polyester serat gelas, yang menjadi tujuan penelitian ini. Penyiapan specimen uji mengacu pada standart ASTM C 1341 – 06 (Standart Test Method for Flexural Properties of Continuos Fiber-Reinforced Advance Ceramic Composites) dengan ukuran spesimen mengacu pada L/d = 16/1. Proses pengujian dilakukan menggunakan uji bending 3 titik (3 poin bending test). Hasilnya menunjukkan bahwa Lapisan komposit polyester baik dengan serat gelas atau tanpa serat gelas dapat menghalangi penyerapan air pada kayu yang dilapisinya serta meningkatkan kekuatan dari kayu yang akan dijadikan bahan baku pada pembuatan perahu nelayan sekitar ± 20 %. Dari 2 jenis kayu yang di teliti didapati bahwa kayu damasui yang diperkuat komposit serat gelas memberi efek penguatan yang lebih baik dibandingkan dengan kayu bayu. Untuk komposit sandwich plywood dan serat gelas Penggunaan 2 lapis serat sebagai kulit (skin) dapat meningkatkan kekuatan bahan komposit sandwich, namun peningkatannya tidak signifikan. Sedangkan ketebalan plywood (core) mempengaruhi kekuatan bahan komposit sandwich, dimana semakin tebal,kekuatannya semakin menurun. Analisa fractography juga menunjukkan bahwa bagian interface antara kayu dan komposit merupakan titik awal kegagalan specimen secara laminasi, sehingga kekuatan mekaniknya sangat tergantung dari kualitas ikatan pada interface, dimana ikatan yang baik akan membentuk cross linking antara kayu dengan komposit.Kata kunci : Kayu komposit, sifat mekanik, absorbsi air, komposit polyester, uji bending Plywood, core, komposit sandwich,
Analisa pengaruh perlakuan kimia pada serat terhadap kekuatan impak charpy komposit serat sabut kelapa bermatriks epoxy Zulkifli Zulkifli; Ida Bagus Dharmawan; Wahyu Anhar
Jurnal POLIMESIN Vol 18, No 1 (2020): Februari
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v18i1.1583

Abstract

Penggunaan serat sabut kelapa pada material komposit akan menaikkan nilai komersial dari perkebunan kelapa. Kekuatan komposit berpenguat serat alam dipengaruhi oleh penyebaran serat, interaksi antara serat dengan matriks, bagaimana serat itu diperoleh, ukuran serat, dan bentuk serat. Untuk memperoleh ikatan yang baik antara matriks dan serat dilakuan modifikasi permukaan serat. Alkalisasi pada serat alam adalah metode yang telah digunakan untuk menghasilkan serat berkualitas tinggi. Penelitian ini menganalisis dan mengetahui pengaruh perlakuan kimia pada serat  terhadap kekuatan impak material komposit diperkuat serat sabut kelapa bermatriks epoxy. Adapun tahapan pada penelitian ini yaitu dilakukan perendaman serat sabut kelapa pada larutan NaOH dengan konsentrasi 10%, 15%, dan 20%, selama 2 jam, lalu serat dicuci dengan menggunakan larutan H2O2 dengan konsentrasi 3% selama 1 jam. Adapun hasil dari penelitian ini yaitu perlakuan alkalisasi terhadap komposit serat sabut kelapa mempengaruhi sifat kekuatan impak dari material komposit dengan kekuatan impak dan energi serap material komposit memiliki hubungan terbalik terhadap jumlah konsentrasi larutan alkalinya. Makin tinggi konsentrasi larutan alkalinya yang diberi pada serat akan menyebabkan makin kecilnya energi serap dan kekuatan impak dari material komposit berpenguat serat sabut kelapa.Kata kunci : komposit, serat sabut kelapa, NaOH, H2O2, kekuatan impak Effect of chemical treatment of composite coir fiber with epoxy matrix on the Charpy impact strengthAbstractThe use of coconut fiber in composite materials will increase the commercial value of coconut plantations. The strength of a natural fiber-reinforced composite is influenced by the spread of the fiber, the interaction between the fiber and the matrix, how the fiber is obtained, the size of the fiber, and the shape of the fiber. To obtain a good bond between the matrix and the fiber surface fibers are modified. Alkalization of natural fibers is a method that has been used to produce high-quality fiber. This study analyzes and examines the effect of chemical treatment on fiber on the impact strength of composite materials reinforced with epoxy coconut fiber coir fiber. The stages in this study were first carried out soaking coconut coir fiber in NaOH solution with a concentration of 10%, 15%, and 20%, for 2 hours, then the fiber was washed using H2O2 solution with a concentration of 3% for 1 hour. The results of this study are the alkalization treatment of coconut coir fiber composites affecting the impact strength properties of composite materials where the impact strength and absorption energy of composite materials have an inverse relationship to the amount of alkaline solution concentration. Where the higher the concentration of the alkaline solution given to the fiber will cause the smaller the absorbing energy and the impact strength of the composite fiber-reinforced coconut fiber.
Effect of green clam shells powder addition on properties biodegradable films of polyvinyl alcohol (PVA) Hendri Hestiawan; Yuzuar Afrizal; Junas Haidi; Candy Juyetzu
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.v21i2.3261

Abstract

This paper presents an experimental study of the addition of green clam shells powder (GCSP) to the biodegradable film properties of polyvinyl alcohol (PVA). To get GCSP, the green clamp shell was immersed in a 50% NaOH solution for 2 hours, blended until the particle size passed 100 mesh, then heated at a temperature of 500 oC for 2 hours. The Biodegradable film characteristic was investigated by the addition of GCSP (2, 4, 8, and 10 %wt) in PVA suspension. PVA/GCSP biodegradable films were prepared by a casting solution method. The GCSP functional group's molecular chemical bond and structural analysis were tested using Fourier Transform Infrared (FTIR) and X-Ray Diffraction (XRD). To obtain the mechanical properties of biodegradable films, a tensile test was carried out. The results of the FTIR and XRD test showed that the alkali treatment or/and the calcination process affected the GCSP grain structure. SEM micrographs showed that the grain structure of GCSP which was treated with alkali or/and the calcination process had a more uniform and homogeneous size. The addition of GCSP to PVA was able to increase the tensile strength of the biodegradable film. Overall, the optimal addition of GCSP was 10 wt.% which was calcination treated in a PVA matrix with tensile strength, elongation at break, and Young's modulus of 170 MPa, 18%, and 1184 MPa, respectively
Improving safety design for gas pipeline installation via horizontal directional drilling: a pipe stress analysis approach Santoso, Mochamad Yusuf; Khairiansyah, Mades Darul; Hernasa, Raya Fitrian
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.v22i3.5128

Abstract

Horizontal Directional Drilling (HDD) has today emerged as a significant and efficient Horizontal Directional Drilling (HDD) has today emerged as a significant and efficient technique for installing pipelines for a variety of purposes, including the production of oil, natural gas, water, sewer, electrical, and telecommunications. Due to the complexity of the technology and the intricate interplay of numerous processes, the safety risks associated with process uncertainty are substantial. However, risk analysis for HDD projects is generally done using qualitative methods. One of the most common factors used for HDD risk assessment is Pipe Stress Analysis (PSA). In this article, a combination of material evaluation and PSA for HDD safety design is suggested to improve the risk analysis. The evaluation will commence with an assessment of the material, followed by an examination of the wall thickness. Subsequently, an analysis of HDD design and pipe stress will be conducted. Using 10-inch API 5L Gr. B pipe, the safety design was successfully tested for a gas pipe project. When using HDD, a natural bend value of no less than 415.3 meters must have a horizontal length of 168 meters. According to the curvature, the length of the entire pipe is 169.03 meters. The combined installation stress was less than 1, while the combined operation stress was 114.87 MPa. These two values met the criteria specified in the standard. Overall, those steps were able to ensure that the HDD installation design is safe for construction.
Pengaruh pemesinan laju tinggi keadaan kering terhadap pertumbuhan aus sisi (VB) pahat karbida berlapis (tialn/tin) pada pembubutan paduan aluminium 6061 Sunarto Sunarto; Sri Mawarni
Jurnal POLIMESIN Vol 16, No 2 (2018): Agustus
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v16i2.587

Abstract

AbstrakPemesinan laju tinggi yang diindikasikan dengan kecepatan potong tinggi pada proses pembubutan keadaan kering menjadi bahasan utama pada penelitian ini. Kecepatan potong (Vc) merupakan salah satu penyebab meningkatnya temperatur pemotongan dan akan mempengaruhi daya tahan alat potong. Akibat temperatur pemotongan yang tinggi pahat akan mengalami kerusakan salah satunya berupa Aus Sisi (VB). VB akan tumbuh secara terus menerus seiring dengan waktu pemotongan. Tujuan penelitian ini adalah untuk mengetahui pengaruh pemesinan laju tinggi terhadap laju pertumbuhan VB selama proses pembubutan paduan Aluminium 6061. Metode yang digunakan dalam penelitian ini adalah dengan menggunakan pahat karbida (Wc+Co) yang dilapisi dengan bahan pelapis Titanium Aluminium Nitrida dan Titanium Nitrida (TiAlN/TiN) menggunakan mesin bubut CNC serta membagi tiga kondisi pemotongan yaitu pada kecepatan potong 800 m/menit, 1000 m/menit dan 1200 m/menit. Hasil yang dicapai dari kondisi pemotongan tersebut adalah pada kecepatan potong 1200 m/menit menghasilkan ukuran VB yang lebih besar jika dibandingkan dengan kecepaatan potong 800 m/menit dan 1000 m/menit dengan waktu pemotongan masing-masing selama enam menit.Kata Kunci: Kecepatan Potong (Vc), Aus Sisi (VB), Alat PotongAbstractHigh speed machining which is indicated by high cutting speed in the dry lathe process becomes the main discussion in this study. The cutting speed (Vc) is one of the causes of increasing the cutting temperature and will affect the durability of the cutting tool. Due to high cutting temperature the cutting tool will suffer damage one of them is Flank Wear (VB). VB will grow continuously along with the cutting time. The purpose of this research is to know the effect of high speed machining to growth rate of VB during the process of Aluminum 6061 alloy. The method used in this research is by using  cutting tool (Wc + Co) coated with Titanium Aluminum Nitride and Titanium Nitride coating materials (TiAlN / TiN) using CNC lathe and dividing the three cutting conditions ie at cutting speed of 800 m / min, 1000 m / min and 1200 m / min. The result of the cutting condition is at a cutting speed of 1200 m / min resulting in a larger VB size when compared to 800 m / min cutting speed and 1000 m / min with each cutting time of six minutes.Keywords: Cutting Speed (Vc), Flank Wear (VB), Cutting Tool

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