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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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Design of indoor test-rig to measure dynamic forces and moments on tire contact path of family car Bukhari M. Kasim; Ilyas Yusuf; Mawardi Mawardi
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.v18i2.1917

Abstract

The vehicle's suspension system is designed to absorb shocks from road disturbance. The dynamic behavior of a tire suspension depends on many factors. Some main factors are vehicle load, speed, steering angle, road disturbances and the amount of tire elasticity. The dynamic behaviour of the tire is very difficult to observe when the vehicle is traveling on the road. To overcome this problem, in this paper, a test rig will be designed to be able to observe changes in tire dynamic properties experimentally for family car type. The design concept is based on the sprung and un-sprung mass dynamics. This research was conducted by five methods; study mechanism of measuring the tire dynamic behaviors, design of test equipment construction, simulations, and analysis of construction strength. The spring mass construction is designed to have 1 degree of freedom which is able to move the translation in a vertical direction to indicate changes in car body height. On the other hand, the un-sprung mass construction is designed to have 3 degrees of freedom that can move translation in the vertical direction, rotation in the z axis and rotation in the x axis. Movement in the vertical direction is to simulate a tire jump, rotation on the z axis is to simulate the steering angle and rotation on the x axis is to simulate the camber angle. The design result shows that the design construction not only saves to handle all forces and moments but can also fulfill functions to simulate the dynamic response of the car model. Simulation result shows maximum stress is point on C-D bar that is 7.13 N/mm2. This value is less than allowable shear stress which is 37N/mm2. By all simulation result, it can be concluded that all materials used are saved for this construction.
PENGARUH VARIASI FRAKSI VOLUME FILLER TERHADAP SIFAT MEKANIK KOMPOSIT RAMBUT MANUSIA BERMATRIKS EPOXY DENGAN PENGUAT TALC POWDER Eko Nurprasetyo; Kardiman Kardiman; Ratna Dewi Anjani
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.v19i2.2283

Abstract

Komposit adalah gabungan dari dua atau lebih material berbeda yang terdiri dari serat dan matriks. Penelitian ini menggunakan serat rambut manusia, talc, matrik epoxy dan hardener. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh variasi fraksi volume filler terhadap sifat mekanik dari komposit epoxy-rambut dan komposit epoxy-rambut-bubuk talc. Pembuatan komposit dengan metode hand layup dengan spesifikasi variasi fraksi volume sebanyak 6 buah dan pengujian yang digunakan adalah uji SEM, uji tarik ASTM D-638, uji bending ASTM D-790, dan uji impak ASTM D-6110. Hasil studi komposit rambut epoxy menunjukkan bahwa semakin rendah fraksi volume rambut akan meningkatkan kerapatannya. Hasil pengujian menghasilkan bahwa uji tarik dengan nilai terbesar diperoleh dari fraksi volume 60% epoksi: 20% rambut: 20% bedak bernilai 1,58 kg/mm2. Uji bending fraksi volume epoksi 60%: 20% rambut: 20% bedak sebesar 4,26 kg/mm3. Uji impak tertinggi diperoleh dari fraksi volume rata-rata epoksi 60%: 40% rambut dengan nilai 4,07 kJ/m2 . Hal ini terjadi karena dari hasil uji tarik, uji bending, dan uji impak selain pendistribusian gaya yang merata oleh matrik juga didukung oleh serat yang mampu terikat dengan talcnya. Jadi unsur penambahan yaitu talc powder mempengaruhi sifat mekanik yaitu kekuatan impak, tarik,dan bending. Composite is a combination of two or more different materials consisting of fibers and a matrix. This research used human hair fiber, talc, epoxy matrix and hardener. The purpose of this study was to determine the effect of variations in filler volume fraction on the mechanical properties of the epoxy-hair composite and the epoxy-hair-talc powder composite. The manufacture of composites using the hand layup method with a specification of 6 volume fraction variations and the tests used were the SEM test, the ASTM D-638 tensile test, the ASTM D-790 bending test, and the ASTM D-6110 impact test. The results of the study of epoxy hair composites showed that the lower the volume fraction of the hair, the higher its density. The test results showed that the tensile test with the largest value was obtained from the volume fraction of 60% epoxy: 20% hair: 20% powder with a value of 1.58 kg/mm2. Epoxy volume fraction bending test 60%: 20% hair: 20% powder at 4.26 kg/mm3. The highest impact test was obtained from the average volume fraction of 60%: 40% hair epoxy with a value of 4.07 kJ/m2 . This happens because from the results of the tensile test, bending test, and impact test, in addition to the uniform distribution of forces by the matrix, it is also supported by fibers that are able to bond with the talc. So the added element, namely talc powder, affects the mechanical properties, namely the tensile and bending impact strength.
Evaluasi sistem pembangkit tenaga uap dengan perangkat lunak cycle-tempo" Zul fikar
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.v7i1.1351

Abstract

Pembangkit tenaga uap dengan dearator yang berkapasitas 100 MW telah dievaluasi menggunakan perangkat lunak Cycle-Tempo dan Microsoft excel add-on FluidProp. Cycle- Tempo merupakan perangkat lunak yang berdaya guna sebagai alat untuk mengevaluasi pembangkit tenaga uap dengan pemodelan. Hasil pemodelan dengan Cycle-Tempo dan perhitungan menggunakan Microsoft excel add-on FluidProp memuaskan. Penyelesaian dengan Cycle-Tempo memiliki ketidakseimbangan energi yang lebih kecil yaitu 0,01 kW dibandingkan dengan hasil evaluasi Microsoft excel add-on FluidProp yaitu 1,87 kW. Berdasarkan pada hasil evaluasi dengan Cycle-Tempo, kinerja sistem sebesar 33,746 dan rasiokerja balik adalah 4,8556.Katakunci : Cycle-Tempo, Microsoft Excel add-on FluidProp, dearator, efisiensi, rasio kerja 
Seasoning Funnels Die Design for Autopacking Machine Distributors Using SUS 316 Material Jatira Jatira; Amri Abdulah; Sukarman Sukarman; Apang Djafar Shieddique; Dede Ardi Rajab; Satria Prayoga
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.v20i2.2895

Abstract

This article discussed the design of dies and punches using SUS 316 material for seasoning funnel (SF) applications in the food industry. Cracks in the welding zone in the seasoning funnel (SF) result in leakage of seasonings and result in product mass, which is one of the main parameters in the food industry and a minimum. The damage location on the SF is identical, on the sides of the SF around the bolt holes. The movement of the spice powder, which rotates at high speed, produces a centrifugal force and is then transferred through the SF. The metal structure is becoming increasingly coarser in the area adjacent to the weld melting line. An additional punch with a knocking arm delivers to the SF to expedite the transfer. The knocking arm caused the SF fracture on the SF. SUS 316 sheet metal material for SF without welding is thought to reduce weld damage and speed up the procurement process. The input design for attempting to make dies has been correctly selected as SUS 316 material thickness of 1.0 mm. The two main processes required to form SF from sheet metal were blanking and bending. The SKD-11 material was selected carefully for the main components of the dies and punch. Supporting components such as shank, shaft, top plate, and bottom plate are determined using St 60 material. St 37 material determines the stripper, punch holder, and stopper components. Based on theoretical calculations, the blanking force should be about 225.5 kN. To minimize the burr in the blanking process, dies and punch allowances of 0.1 mm were chosen. The minimum required bending force calculation was 39 kN. A material factor spring back value of 0.98 was selected correctly to achieve the desired bending angle. The simultaneous blanking and bending processes necessitated using a 72.96-tonne power press machine.
Perancangan perangat lunak perhitungan dan pemograman database optimasi proses pemesinan Marzuki Marzuki
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.v1i1.1393

Abstract

Perkembangan teknologi CIM (Computer Integrated Manufacturing) memaksa perusahaan manufaktur untuk meningkatkan kebijaksanaan strategi kompetisinya dengan fleksibelitas dan optimasi proses pemesinan untuk tetap mampu bersaing dalam pasar dan konsumen yang berubah-ubah. Perhitungan waktu dan biaya produksi haruslah dapat meningkatkan efektifitas kerja dan optimasi proses pemesinan. Tujuan dari penulisan jurnal ini adalah membuat suatu perangkat lunak dan pemograman database yang dapat melakukan perhitungan waktu, biaya produksi secara otomatis dan tersedianya database yang terintegrasi dengan menggunakan bahasa pemrograman Visual Basic 6.O. Sistem kerja dari database elektronik yang tergabung dalam Database Management System (DBMS) ini meliputi  hampir seluruh langkah proses, input data, penyimpanan data, verifikasi data dan perhitungan optimasi proses pemesinan. Penggunaan perangkat Iunak ini menunjukan ketelitian, kemudahan pemanggilan dan penyimpanan data, edit data, dan efisiensi waktu perhitungan biaya dan waktu produksi proses pemesinan secara keseluruhan tanpa harus menggunakan tenaga ahli.
Analisa efektivitas prokdusi pada unit urea i dengan menggunakan metode total productive maintenance (TPM) di PT. Pupuk Iskandar Muda Sariyusda Sariyusda; Fakhriza Fakhriza; Johansyah Putra
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.v14i1.300

Abstract

PT Pupuk Iskandar Muda adalah perusahaan yang bergerak dibidang industri kimia yaitu memproduksi pupuk urea dan ammonia. Pada lini produksi pupuk urea terdapat beberapa masalah produksi yaitu belum tercapainya rencana produksi dan tingginya downtime mesin. Oleh karena itu, dilakukan pengukuran efektivitas pada lini produksi urea untuk mengetahui kinerja mesin/peralatan. Overall Equipment Effectiveness (OEE) adalah metode yang digunakan untuk mengukur efektivitas kinerja peralatan, kemudian mengidentifikasi penyebab rendahnya efektivitas dengan menggunakan six big losses. Hasil penelitian menunjukan bahwa nilai rata-rata OEE tahun 2015 sebesar 79.24%. Losses yang berpengaruh adalah breakdown losses sebesar 29.64% dan reduced speed losees sebesar 10.70%. penyebab losses antara lain karena operator kurang mememahami gejala kerusakan mesin, tidak maksimal saat kegiatan preventive maintenance, keterlambatan dalam penanganan perbaikan, dan kekurangan material. Beberapa rekomendasi perbaikan berdasarkan konsep Total Productive Maintenance adalah mengadakan training kepada operator, disiplin dan proaktif dalam melaksanakan preventive maintenance sesuai dengan prosedur.Kata kunci: Overall Equipment Effectiveness (OEE), six big losses, Total Productive Maintenance
The effect of infill pattern, infill density, printing speed and temperature on the additive manufacturing process based on the FDM technology for the hook-shaped components Nguyen Huu Tho; Tong Cong Minh; Nguyen Phat Tai
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.v18i1.1445

Abstract

The additive manufacturing technology based on the principle of material addition is an important technology in product design, manufacturing, and development. In addition, the trend in the recent future of this technology will be a major step to develop in the rapid manufacturing industry. Among the rapid prototyping technologies, the most popular FDM (fused deposition modeling) technology has been widely applied in the practice. The quality of rapid prototyping technology in general as well as FDM technology in particular mainly depends on the parameters in the prototyping and operational process. In this paper, the optimum parameters of the prototyping process based on the FDM technology are identified to improve the tensile strength of 3D printing products with PLA and PLA-copper materials. The parameters are chosen in the process of doing the experiments such as infill pattern, fill density, print speed, and print temperature. Then, based on Taguchi analysis technique, the experimental planning method is employed for design and optimization, with the support of Analysis of Variance (ANOVA) to evaluate and identify the influence of parameters on the tensile strength of the printed hook-shaped product. The results highlighted that the maximum tensile force of the sample is printed with PLA-Copper material with the optimum parameters is infill density of 75%, printing speed of 65 mm/s, and temperature of 185°C.
Pengaruh diameter baut terhadap kekuatan rangka main landing gear pesawat UAV menggunakan metode elemen hingga Lasinta Ari Nendra Wibawa
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.v17i1.828

Abstract

Penelitian ini mengkaji tentang pengaruh diameter baut terhadap kekuatan rangka main landing gear untuk pesawat UAV menggunakan metode elemen hingga. Analisis statik linear dilakukan menggunakan software Autodesk Inventor Professional 2017. Material rangka main landing gear menggunakan Aluminium paduan 5083. Pesawat UAV memiliki berat 75 kg dengan kecepatan landing 10 m/s dan waktu impak 0,5 detik. Variabel diameter baut yaitu 11 mm, 12 mm, 13 mm, dan 14 mm. Hasil simulasi menunjukkan bahwa tegangan Von Mises untuk diameter baut 11 mm, 12 mm, 13 mm, dan 14 mm berturut-turut yaitu 82,092 MPa, 85,113 MPa, 85,141 MPa, dan 85,340 MPa. Nilai deformasi untuk diameter baut 11 mm, 12 mm, 13 mm, dan 14 mm berturut-turut yaitu 2,173 mm, 2,185 mm, 2,194 mm, dan 2,204 mm. Nilai faktor keamanan untuk diameter baut 11 mm, 12 mm, 13 mm, dan 14 mm berturut-turut yaitu 3,472, 3,349, 3,347, dan 3,340. Dari hasil simulasi dapat disimpulkan bahwa diameter baut terbaik adalah berukuran 11 mm. Kata kunci:  Aluminium 5083, Autodesk Inventor 2017, Analisis Elemen Hingga, Main Landing Gear, Diameter Baut AbstractThis study examined the effect of bolt diameter on the strength of the main landing gear frame for UAV aircraft using the finite element method. Linear static analysis was carried out using the Autodesk Inventor Professional 2017 software. Main landing gear frame using Aluminum alloy 5083. UAV aircraft weighed 75 kg with a landing speed of 10 m / s and an impact time of 0.5 seconds. Variables of bolt diameter were 11 mm, 12 mm, 13 mm and 14 mm. The simulation results show that Von Mises stress for bolt diameters 11 mm, 12 mm, 13 mm, and 14 mm were 82.092 MPa, 85.113 MPa, 85.141 MPa and 85.340 MPa respectively. Deformation values for bolt diameters of 11 mm, 12 mm, 13 mm, and 14 mm respectively were 2.173 mm, 2.185 mm, 2.194 mm and 2.204 mm. The safety factor values for bolt diameters were 11 mm, 12 mm, 13 mm, and 14 mm respectively, which are 3.472, 3.349, 3.347, and 3.340. From the simulation results it can be concluded that the best bolt diameter was 11 mm in size. Keywords: Aluminum 5083, Autodesk Inventor 2017, Finite Element Analysis, Main Landing Gear, Bolt Diameter 
Efek implantasi ion chrom dan chromium nitrida terhadap laju korosi dan mikrohardness pada machinery steel vcl 140 Reza Putra
Jurnal POLIMESIN Vol 8, No 1 (2010): Februari
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jp.v8i1.1339

Abstract

Keterbatasan material dalam menghalangi proses korosi merupakan dasar dari dilakukannya penelitian ini. Metoda yang dipilih untuk menghalangi korosi sekaligus menigkatkan kekerasan permukaan material adalah dengan teknik implantasi ion. Uji korosi dilakukan pada sampel menggunakan alat potensiostat PGS 201T dalam media NaCI 0,008M. Material yang terbuat dari baja VCL 140 diimplantasi ion chrom dan chromium nitrida dengan memvariasikan waktu implantasi pada energi 100 keV untuk mendapatkan kondisi optimum dari kekerasan permukaan, penurunan laju korosi dan menganalisa struktur permukaan yang terbentuk. Hasil penelitian ini menunjukkan peningkatan kekerasan sebesar 439 HVN dan terjadi penurunan laju korosi hingga 1,13 mmpy akibat dari pembentukan lapisan baru pada permukaan material.Kata kunci : implantasi ion, kekerasan, laju korosi.
A review of solar drying architecture: Direct, indirect and mixed-mode solar dryer Permana Andi Paristiawan; Ihwan Ghazali; Dwi Aryanti; Budiarjono Budiarjono; Ayu Amanah; Muhammad Idris; Dhany Hermansyah; Esam Abu Baker Ali
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.v20i2.3071

Abstract

Solar energy is available in abundance. It is considered an effective energy source for drying agricultural products. Although it is affordable, open sun drying suffers from both qualitative and quantitative issues caused by unexpected environmental conditions (rain, dust), animals (insects, birds, rodents), and over-or under-drying. Therefore, it is important to introduce a better drying technology to preserve solar energy without deteriorating the quality of the drying product. For that reason, solar dryers have been developed to produce higher drying temperatures and lower relative humidity that will eventually lead to superior drying rates and reduced final moisture contents compared to the conventional open sun drying method. Therefore, not only does the solar dryer meet the requirements of agricultural products, but it also saves energy, time, and money.

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