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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 variasi tool speed dan traveling speed pada friction stir welding Al 2017 dan Al 7075 Ely Aprilia; Audi Prasetya Bagdja; Asep Ridwan Setiawan
Jurnal POLIMESIN Vol 19, No 1 (2021): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v19i1.2040

Abstract

AbstrakFriction Stir Welding (FSW) merupakan proses penyambungan logam dalam kondisi solid state atau kondisi logam yang tidak meleleh. Satu keunggulan dari proses penyambungan menggunakan FSW adalah tidak banyak mengubah sifat logam induknya karena panas yang dihasilkan tidak besar. FSW memiliki potensi untuk menyambung alumunium sejenis dan beda jenis dengan hasil lasan yang memiliki sifat fisik dan mekanik baik. Penyambungan alumunium menggunakan metoda las konvensional memerlukan perlakuan khusus karena terdapat lapisan alumunium oksida, yang memiliki titik cair yang sangat tinggi, pada permukaannya. Tujuan dari penelitian ini untuk menganalisis pengaruh kecepatan putaran tool dan kecepatan translasi terhadap karakteristik hasil lasan yang dihasilkan dari metode FSW pada penyambungan logam beda jenis alumunium 2017-T4 dengan alumunium 7075-T6. Variasi yang digunakan adalah kecepatan putaran tool 1250 rpm, 1000 rpm, dan 800 rpm, dengan variasi kecepatan translasi yang digunakan adalah 100 mm/menit, dan 80 mm/menit. Hasil penelitian menunjukkan bahwa terjadinya perbedaan ukuran butiran dan kekerasan pada tiap daerahnya. Daerah yang terpengaruh oleh panas (HAZ) memiliki kekerasan yang paling rendah diantara zona-zona yang lainnya yaitu memiliki nilai kekerasan HAZ Al 7075 sebesar 94,13 HV0,2 dan Al 2017 sebesar 88,76 HV0,2. Kekerasan paling tinggi terdapat pada sampel B3 (1250 rpm 80 mm/menit) pada daerah yang diaduk (Stir Zone) yaitu  131 HV0,2. Adapun nilai kekuatan tarik yang dihasilkan paling maksimum yaitu pada sampel B3 (1250 rpm 80 mm/menit) yaitu sebesar142,08 N/mm2.AbstractFriction Stir Welding (FSW) is a process of metal joining in solid state or the condition of metals that do not melt therefore the base metal properties do not change. Friction Stir Welding (FSW) is potential method to joining similar or dissimilar aluminum with weld results that have good mechanical properties. In conventional welding methods, joining aluminum with similar or dissimilar aluminum need special treatment on the surface and choosing the correct parameters. The purpose of this study was to analyze the effect of Tool Rotation Speed and travelling speed on the weld characteristics that produced by the Friction Stir Welding (FSW) method in joining dissimilar aluminum 2017-T4 with aluminum 7075-T6. The variations used are tool rotation speed of 1250 rpm, 1000 rpm, and 800 rpm, and the travelling speed used is 100 mm/min, and 80 mm/min. The results showed that there are differences in grain size and hardness in each area. Heat affected zone (HAZ) had the lowest hardness among other zones. Hardness value of HAZ Al 7075 and Al 2017 are 94.13 HV0.2 and  88.76 HV0.2, respectively. The highest hardness was found in the B3 sample (1250 rpm 80 mm/min) in the stirred area (Stir Zone) which was 139.8 HV0.2. The maximum value of tensile strength produced in the B3 sample (1250 rpm 80 mm/min) is 142.08 N/mm2.
Effect of sintering temperature on crystal structure and physical properties of the Mg0,92Zn0,05C0,03 Alloy Budiarto Budiarto; Susilo Susilo
Jurnal POLIMESIN Vol 21, No 3 (2023): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i3.3719

Abstract

The effect of sintering temperature on the crystal structure and physical properties of the Mg0,92Zn0,05C0,03 alloy has been studied. Magnesium-based alloys are one of the alloys that have been used in industry, the health sector, and as biodegradable materials and biomaterials. The aim of this study was to determine the effect of temperature and sintering holding time on crystal size, dislocation density, microlattice strain, and yield strength, porosity and density of Mg0,92Zn0,05C0,03 alloy. The results of testing the crystal structure of the alloy Mg0,92Zn0,05C0,03 with an X-ray diffractometer showed several diffraction peaks consisting of the main phase α–Mg and a small part of the MgZn phase. Testing of Mg0,92Zn0,05C0,03 alloy after sintering with variations in temperature and 90 minutes holding time for crystal size showed that the higher the sintering temperature (425 0C to 575 0C) the crystal size value decreased significantly from 82.36 nm to 18.75 nm, and the dislocation density increased from 0.113 to 0.868 lines/mm2. For micro strain decreased from 0.015 to 0.0087. However, in the very small porosity test, the increase was from 29.8% to 31.9%. As well as for density (1.8 gr/cm3) and yield strength (274 MPa) there was no significant decrease of around 1.4%, but the synthesized Mg0,92Zn0,05C0,03 alloy fulfilled as a bone implant bio material.hhThe effect of sintering temperature on the crystal structure and physical properties of the Mg0,92Zn0,05C0,03 alloy has been studied. Magnesium-based alloys are one of the alloys that have been used in industry, the health sector, and as biodegradable materials and biomaterials. The aim of this study was to determine the effect of temperature and sintering holding time on crystal size, dislocation density, microlattice strain, and yield strength, porosity and density of Mg0,92Zn0,05C0,03 alloy. The results of testing the crystal structure of the alloy Mg0,92Zn0,05C0,03 with an X-ray diffractometer showed several diffraction peaks consisting of the main phase α–Mg and a small part of the MgZn phase. Testing of Mg0,92Zn0,05C0,03 alloy after sintering with variations in temperature and 90 minutes holding time for crystal size showed that the higher the sintering temperature (425 0C to 575 0C) the crystal size value decreased significantly from 82.36 nm to 18.75 nm, and the dislocation density increased from 0.113 to 0.868 lines/mm2. For micro strain decreased from 0.015 to 0.0087. However, in the very small porosity test, the increase was from 29.8% to 31.9%. As well as for density (1.8 gr/cm3) and yield strength (274 MPa) there was no significant decrease of around 1.4%, but the synthesized Mg0,92Zn0,05C0,03 alloy fulfilled as a bone implant bio material.
Pengembangan mesin Drain Gutter Cleaner mengunakan metode Quality Function Deployment (QFD) sebagai alternatif penanggulangan sampah di kota Bengkalis Ilham Saputra; Firman Alhaffis
Jurnal POLIMESIN Vol 17, No 2 (2019): Agustus
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jp.v17i2.1018

Abstract

Sampah merupakan masalah yang sangat mendominasi dunia, khususnya di daerah perkotaan seperti Kota Bengkalis. Banyaknya bencana yang ditimbulkan oleh sampah, menjadikan sampah sebagai obyek utama yang harus dilakukan pengelolaan secara sistematis. Bencana yang ditimbulkan oleh sampah seperti terjadinya penyumbatan saluran air. Sulit dan perluya tenaga kerja yang banyak dalam proses membersihkan sampah pada saluran air, menjadi faktor utama saluran air terhambat oleh sampah yang terbawa arus. Pada penelitian ini dilakukan pengembangan mengenai alat pembersih selokan yang dapat mendukung kinerja masyarakat yang perduli terhadap lingkungan. Penelitian berikut menggunakan metode Quality Function Deployment (QFD) sebagai alat untuk mengatasi permasalahan yang terjadi. Data yang didapatkan berupa data kuantitatif dari hasil kuesioner 32 orang petugas selokan sebagai objek penelitian. Hasil dari analisis diperoleh mesin yang dikembangkan akan menggunakan sistem pengangkatan dengan media bucket sebagai pengangkat sampah yang terbawa arus. Dari hasil dapat dilihat bahwa konsumen membutuhkan 13 Permintaan yang didapat dari House of Quality (HOQ) dalam proses pengembangan mesin drain gutter cleaner. Dengan urutan bobot terbesar sampai terkecil dari Permintaan konsumen yaitu ukuran mesin, umur mesin, rangka besi, mesin sederhana, kapasitas penampungan, menggunakan energi listrik, menghidupkan tombol, gaya angkat,  penutup motor, rangka dilapisi cat, terdapat 3 bucket, tombol on-off, dan warna oranye. Kata Kunci: Penanggulangan sampah, Mesin Pembersih Selokan, Quality Function Deployment (QFD), Development of drain gutter cleaning machine using Quality Function Deployment  (QFD) method as alternative waste management in the City of BengkalisAbstractWasteis a global problem, especially in urban areas such as Bengkalis City. Many disasters caused by waste, making waste as the main object that must be done systematically management. Disasters caused by waste such as blockage of waterways.Difficult and requires a lot of labor in the process of cleaning up waste in the waterways, being a major factor in waterways being obstructed by waste flowing. In this research, the development of a gutter cleaning tool that can support the performance of people who care about the environment. The following research uses the Quality Function Deployment (QFD) method as a tool to overcome problems that occur. The data obtained in the form of quantitative data from the results of a questionnaire 32 sewers as research objects. The results obtained from the analysis of the engine developed will use a lifting system with a bucket media as a waste carrier carried by the flow of water. From the results it can be seen that consumers need 13 requests obtained from the House of Quality (HOQ) in the process of developing a drain gutter cleaner machine. With the largest to smallest order of weight of consumer demand, namely engine size, machine life, iron frame, simple machine, storage capacity, using electrical energy, turning on the button, lifting force, motor cover, paint coated frame, there are 3 buckets, on-off button , and orange. Keywords:Waste management, Drain Gutter Cleaner, Quality function Deployment (QFD)
The simulation of heat transfers and flow characterization on wickless loop heat pipe Ainur Rosidi; Giarno Giarno; Dedy Haryanto; Nursinta Adi wahanani; Yoyok Dwi Setyo Pambudi; Mukhsinun Hadi Kusuma
Jurnal POLIMESIN Vol 20, No 1 (2022): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v20i1.2497

Abstract

The severe accident at a nuclear power plant in Japan became an important lesson for aggressively involving passive cooling systems to improve safety. One of the passive cooling system technologies with excellent heat dissipation capabilities and great potential for a passive cooling system is the heat pipe, including the loop heat pipe (LHP). This research aims to study the phenomenon of heat transfer and flow characterization in the wickless loop heat pipe. The method used in this research is a simulation using the software Computational Fluid Dynamics, Fluent. This simulation study gives the effect of filling ratio and heat load in the evaporator at LHP. Demineralized water as the working fluid filled in the LHP was varied at the filling ratio values of 40%, 60%, and 80%. The heat load in the hot water temperature absorbed by the evaporator was varied by 45°C, 55°C, and 65°C. Cooling air as a heat taker in the condenser is given at a fixed temperature value of 25oC. The simulation results obtained indicate that the heat transfer in the wickless LHP has a temperature distribution profile in the LHP, which is almost uniform for every variation of filling ratio and heat load. Compared to filling ratios of 40% and 60%, at 80% filling ratios, the optimal time for the formation of natural circulation flow is achieved when the LHP is given a heat load of 55°C in the evaporator. This simulation shows that the LHP without wick does not produce an excellent natural circulation flow as expected in general natural circulation in the LHP. The results of this simulation can be used as the knowledge that the LHP that will be designed for experimental purposes must be using a wick as a vapor regulator to rise to the condenser only through one adiabatic side.
Investigation of mechanical properties and dynamic characteristics of OPEFB Fiber Composite Zuhaimi Zuhaimi; Misran Misran; Indra Mawardi; Darmein Darmein; Nurlaili Nurlaili; Zaini AK; Hanif Hanif; Amir D
Jurnal POLIMESIN Vol 21, No 4 (2023): August
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i4.4247

Abstract

Composite materials is increasingly experiencing an increa- sing trend, the manufacture of composites currently uses a lot of natural fiber reinforcement, Oil Palm Empty Fruit Bunches (OPEFB) fiber is a fiber that comes from oil palm empty fruit bunches waste that grows a lot in Indonesia and has the potential to be used as reinforcement in the manufacture of composites. With natural fiber reinforcement. The manufacture of composites in this study varied the fiber volume fraction by 5%, 15%, and 25%. Many previous studies on composite materials have focused on studying the physical and mechanical properties of composites. Even though damage to a structure or material is not only caused by static loads but also by dynamic loads. Vibration is a dynamic load experienced by material or structure, so it is necessary to determine the dynamic character of composite materials, one of the dynamic characteristics of materials is their natural frequency, the determination of the natural frequency in this study was carried out by using the finite element method in the ANSYS software. The results of the analysis in the form of tensile strength values and modulus of elasticity were obtained from tensile testing and dynamic characters in the form of natural frequencies and vibration modes were obtained from the analysis modal simulation process. From the results of the tensile test, it was found that the composite with a variation of 15% OPEFB fiber volume had the highest tensile strength and modulus of elasticity, as well as the results of the analysis modal simulation, a composite with 15% OPPEFB fiber, had the highest natural frequency value among the other two variations.
Rancang bangun dan uji fungsional pengeruk ditcher lengan ayun Samsul Bahri
Jurnal POLIMESIN Vol 8, No 2 (2010): Agustus
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jop.v8i2.1370

Abstract

Ditcher berpengeruk lengan ayun adalah furrower yang pada bagian belakang terdapat pengeruk untuk mengeruk tanah hasil buangan furrower. Ditcher ini digunakan untuk pembuatan got melintang pada budidaya tanaman tebu lahan kering. Konstruksi penggerak pengeruk dirancang untuk menghasilkan gerakan pengeruk sesuai dengan yang diinginkan. Daya penggerak pengeruk didapatkan dengan suatu mekanisme yang memanfaatkan profil lahan. Konstruksi penggerak pengeruk terdiri dari: roda, pemegang roda, lengan roda, poros mekanisme, lengan pengeruk, pengeruk, dan standar lengan. Gerakan ayunan naik turun pengeruk yang relatif tegak lurus dihasilkan oleh lengan dengan mekanisme empat batang penghubung sejajar. Lengan ini berayun akibat gerakan naik turun roda yang ditransmisikan melalui sebuah poros. Profil yang dihasilkan mendekati profil yang diinginkan dengan perbedaan ketinggian maksimum 3,5 cm. Gerakan pengeruk sebelah kanan dan kiri terjadi sedikit perbedaan dengan unbalance maksimum 6 cm. Gaya turun pengeruk berbeda untuk pengeruk kanan dan kiri baik untuk penggunaan roda kecil dan pemegang pendek maupun penggunaan roda besar pemegang panjang. Gaya turun pengeruk maksimum 1,8 KN terjadi pada roda besar dan pemegnag roda panjang sebelah kanan.Kata kunci : Ditcher lengan ayun, pengeruk, profil lahan, konstruksi, gaya.
Neural network approach for predicting aerodynamic performance of NACA airfoil at low Reynolds number Mohamad Yamin; Zaid Al Kahfi Ramadhan
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.v20i2.3065

Abstract

In designing and developing airfoils, confirmation of proper design performance under various flow conditions is vital. Experimental studies using wind tunnels or numerical simulations can often utilize. In some cases, numerical studies have a weakness in computational time. This study focuses on predicting the drag coefficient of the airfoil using the CNN machine learning architecture. Starting with a numerical simulation of 500 types of NACA airfoils with a Reynolds number of 4000 using XLRF5 software to obtain image data, lift and drag coefficients. The training, test, and validation dataset uses numerical simulation results as labels. ReLU is the activation function used in this study, with Adam optimizer and MSE loss function. It achieved a relative error of 8% in predicting the drag coefficient. With the results obtained, aircraft designers can use the method to predict the drag coefficient value from various geometries.
Safety Analysis Factor Of Smart Shredder Machine Frame For Face Mask Waste Hendi Lilih Wijayanto; Amiruddin Amiruddin; Angga Tegar Setiawan; Joko Sulistyo; Yusdianto Yusdianto
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.v22i1.4036

Abstract

The COVID-19 pandemic emerged as a global public health threat. Hence, the potential danger increased the use of health masks, resulting in increased medical waste in the environment. This incident also occurred in Morowali District, especially in the PT Indonesia Morowali Industrial Park area. The waste produced by employees was disturbing; thus, it required urgent prevention and control of a pandemic. During the pandemic, the industrial area (IMIP) needed to provide various health protocol facilities that directly/indirectly benefited employees' health. This research designed a tool to solve this problem, namely the frame design of the smart shredder machine for face mask waste. This device works automatically (IOT) to shreds, process, and sterilize mask waste. The results of this tool can be monitored through periodic applications for the mask waste sterilization system and the destroyed mask waste storage system. This tool is suitable for placing in high-mobility industrial areas, such as the IMIP industrial area, which has around 60,000 employees.
Pengaruh redaman meda magnit terhadap ayunan von waltenhoven dan piringan logam berputar Nurlaili Nurlaili; Sumardi Sumardi
Jurnal POLIMESIN Vol 2, No 1 (2004): Februari
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jop.v2i1.1407

Abstract

Studi analisis simulasi kekuatan beban pada alat bantu pembuatan lubang dengan sudut kemiringan 45 derajat Dr. Fatahul Arifin, S.T., Dipl.Eng.EPD., M.Eng.Sc; Dwi Arnoldi, S.T., M.T.; Ella Sundari, S.T., M.T.; Fenoria Putri, S.T., M.T.; Feby Agasa; Yudha Ramadhan; Gustaf Susetyo; Dr. Yusuf Dewantoro Herlambang, S.T., M.T.
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.v18i2.1837

Abstract

Jig and Fixture 45 degree bore is a tool which is used to make hole the degree 45 degrees. The goal of study is design and analyze the strength of the frame and assembly with variations in position of load and value from 100 kg to 500 kg. The results of the stress analysis feature with finite element Analysis (FEA) are von misses stress, displacement, and safety factor. The Frame uses a hollow carbon steel of 20 mm x 20 mm, a material of carbon steel. The frame length is 300 mm, the width is 300 mm, the height is 270 mm, dimension of the tool is 300 mm x 300mm x 270 mm. The simulation results are; the safety factor of frame maximum is 7.08 with a load of 100 kg, while minimum is 1.42 with load 500 kg. Whereas, the overall assembly safety factor maximum is 3.88 with loads 100 kg and minimum is 0.82 with load 500 kg. The unsafe location is on the upper of connection frame, while for the overall assembly is on the buffer of shaft component.

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