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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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Numerical simulation analysis of structural strength of portable skid for storage tank with 50.000 liter capacity Muslimin Al Masta
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.v21i2.3501

Abstract

AbstrackA storage tank is a container used to store fluids such as fuel, water, and chemical. Skid construction is implemented to make the tank smoothly transported while operated, such as in the mining field. Skids were assembled on the storage tank's base to sit on the ground. This study aims to design and analyze a portable skid storage tank to resist the load of 50,000 liters (392 kN) of fuel and 45 kN of mass of construction itself statically. The skid's main components are a wear plate, pad eye, and seamless pipes of schedule 40 for support, central, and base. All structure's material is 250 MPa yield strength of ASTM 36 low carbon steel. Manual calculations and simulation analysis were implemented to review the skid structure's maximum stress and safety factor. The examination included pipe support, central pipe, and pad eye. Based on the result, the highest stress of 157.88 MPa by ANSYS and 148.07 MPa by manual calculation. Therefore, the construction is safely based on the Tresca and Von Mises criteria.
Analisa Pengaruh Variasi Parameter Pemotongan Dan Pendingin Terhadap Tingkat Keausan Pahat End Mill HSS Hasil Pemesinan CNC Router Milling Pada Aluminium Sheet 1100 muhammad rahmat rahmat; Bambang Dwi Haripriadi
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.v17i2.1014

Abstract

Pada proses pemesinan, salah satu hal yang tidak bisa terlepaskan adalah timbulnya keausan pahat setelah dilakukan proses pemotongan. Untuk mengurangi laju keausan pahat biasanya dengan penentuan parameter pemotongan yang baik dan diberikan media pendingin yang berfungsi untuk mengontrol temperatur pada saat pelumasan pemotongan. Tujuan dari penelitian ini adalah  untuk  mengetahui  pengaruh variasi parameter pemotongan dan pendinginan terhadap keausan pahat end mill HSS. Material benda kerja yang digunakan pada penelitian ini adalah aluminium sheet 1100 dan pahat end mill HSS berdiameter 6 mm dengan di variasikan parameter pemotongan yaitu gerak makan (30 mm/min, 40 mm/min, 50 mm/min), kedalaman potong (0,5 mm, 1 mm, 1,5 mm), media pendingin yang digunakan yaitu coolant, udara, oli. Pengambilan data keausan pahat dilakukan menggunakan mikroskop USB dengan cara mengukur panjang keausan tepi (VB). Berdasarkan Analisis for signal to noise ratios keausan pahat yang terkecil adalah pada parameter gerak makan 30 mm/min, kedalaman potong 0,5 mm, dan pendingin oli. Berdasarkan analisis of varian (ANOVA) parameter kedalaman potong dan media pendingin menghasilkan nilai P 0,050, hal ini  menunjukkan bahwa parameter tersebut merupakan faktor yang signifikan dalam mempengaruhi keausan pahat.Kata Kunci : keausan pahat, parameter pemotongan, media pendingin, end mill HSS, analisis for signal to noise ratios, analisis of varian (ANOVA). Effect of cutting and cooling parameters against the wear of HSS End Mill Chisel  Machined by CNC router milling on aluminum sheet 1100AbstractIn the machining process, one of the things that cannot be released is the appearance of tool wear after the cutting process is done. To reduce tool wear rates usually by determining the cutting parameters that are good and given a cooling medium that serves to control the temperature during cutting lubrication. The purpose of this study was to determine the effect of variations in cutting and cooling parameters on HSS end mill tool wear.The workpiece material used in this study is aluminium sheet 1100 and HSS end mill chisels with a diameter of 6 mm with varying cutting parameters namely feeding motion (30 mm / min, 40 mm / min, 50 mm / min), cutting depth (0, 5 mm, 1 mm, 1.5 mm), the cooling media used is coolant, air, oil. Data retrieval of tool wear was carried out using a USB microscope by measuring the length of edge wear (VB). Based on analysis for signal to noise ratios the smallest tool wear is on the feed motion parameters 30 mm / min, the cut depth is 0.5 mm, and the oil cooler. Based on the analysis of variance (ANOVA) the depth and cut depth parameters produced a P value 0.050, this indicates that these parameters are a significant factor in influencing tool wear. Keywords: tool wear, cutting parameters, coolant, HSS end mill, analisis for signal to noise ratios, analisis of variance (ANOVA).
The mechanical strength analysis on the pool tub of loop heat pipe prototype using CATIA software Dedy Haryanto; Giarno Giarno; G. Bambang Heru K; Ainur Rosidi; Nursinta Adi Wahanani; 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.v20i1.2303

Abstract

The NuScale Small Modular Reactor operates using a fully passive cooling system. Under normal operating conditions, the cooling water used to immerse the reactor has a temperature range of 30°C – 40°C. To reduce additional water due to evaporation, the use of a loop heat pipe (LHP) as a heat sink in the pool cooling water can reduce evaporation and increase the economic value of NuScale operations. To get a further basic understanding of LHP as an additional passive cooling system, a small-scale LHP prototype was made at the Center for Nuclear Reactor Technology and Safety, National Nuclear Energy Agency. This LHP prototype consists of several components, including a pool tub unit that simulates a pool of cooling water immersing the reactor. This research focuses on analyzing the mechanical strength of the pool tub before it is made and used as an experimental tool. The purpose of the analysis is to determine the mechanical strength of the pool tub including mechanical stress and translational displacement related to the level of safety and design safety. The method used is to simulate using CATIA software to analyze the mechanical strength of a swimming pool by making a 3-dimensional model according to an existing design, providing restraint on a 3-dimensional model, providing loads in the form of pressure and temperature on a 3-dimensional model, and testing mechanical strength. The simulation results show that the mechanical stress produced is 1.96 x 108 N/m2 at the bottom of the pool tub. The mechanical stress that occurs is smaller than the yield strength of the AISI 1040 Carbon Steel material, which is 3.5 x 108 N/m2. The translational displacement obtained of 0.844 mm is very small when compared to the dimensions of the pool basin, so it does not result in changes in the shape of the pool basin when pressure and temperature are given during the experiment. The conclusion of this simulation shows that the design of the pool tub unit is safe to manufacture and operate during the experiment.
Energy absorption and toughness analysis on FSW butt joint of AA 5052 and AA 5083 Rahadian Nopriantoko
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.v21i4.4107

Abstract

Friction Stir Welding (FSW) is an efficient and effective welding method with good-quality welds. Aluminum Alloy (AA) has been widely used for various automotive needs, including in vehicle manufacturing. AA series 5XXX is a type of material used for vehicle manufacturing because it has good strength properties even after the joining process. A similar butt joint using the FSW method was carried out on material AA 5052 and AA 5083. The results of the welding were then given radiographic testing to determine the general condition of the welds. The impact test was carried out according to the procedures standard of ASTM on the welding results to analyze the energy absorption and toughness properties of welds by getting the impact value of the welded joint, and then looking for the quantity ratio to the impact value of the base material. After that, the results and discussion were obtained that the welded areas showed different impact strength and absorbed energy value, which is compared to the base material the range is below with a decrease in value of between 34% and 68% of the initial toughness strength of the parent material. The reduction in toughness strength can be attributed to the influence of mechanical properties during the welding process. Nevertheless, the welds demonstrated good quality and integrity, highlighting FSW's efficacy in joining aluminum alloys. This research significantly contributes to comprehending the energy absorption and toughness analysis of FSW butt joints in aluminum alloys, crucial for vehicle body technology applications.
Synchronization of Treadmill Speed to Bicycle Model Speed Based on PID Controller Baskoro Latu Anurogo
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.v20i2.2611

Abstract

 Bad weather and crowded vehicle lanes are often obstacles for cyclists during practice. Bicycle treadmills are the right solution to answer these demands. A person can cycle on a treadmill without having to leave the room. The rotation speed of the treadmill will be determined by the rotational speed of the bicycle wheels, so the bicycle will not fall off the treadmill. For this reason, this study aims to design a PID-based controller that will control the rotational speed of the treadmill so that it is in sync with the rotational speed of the bicycle wheel. The rotation of the bicycle wheel is represented by the wheel of a bicycle model that rotates on a treadmill, while the treadmill is represented by a model in the form of a conveyor. The results showed that in the first second, the conveyor speed was not the same as the speed of the bicycle model. Even so, after 1.5 seconds, the conveyor can catch up to the speed of the bike model. Despite some glitches, the conveyor can keep up with the speed of the bike model.
Weight optimization of 200 mm diameter rocket motor tube using finite element method Wibawa, Lasinta Ari Nendra; Daryana, Alit; Saparudin, Parid; Indrayana, Wan Dedy Fitrah; Handriyana, Handriyana; Diana, Asep; Sobirin, Toris
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.v21i6.4142

Abstract

The lightweight design of the rocket motor tube is a critical requirement for enhancing the rocket's flight performance. This study assesses the impact of wall thickness, cap thickness, and fillet radius on structural strength and the optimization of rocket motor tube weight using the finite element method with the assistance of Ansys software. A total of 12 finite element model variations, utilizing Aluminium 6061-T6, were developed and subjected to a uniform internal operating pressure load of 10 MPa. The design includes wall thickness variations of 8 and 10 mm, cap thickness options of 25 and 30 mm, and fillet radius dimensions of 20, 25, and 30 mm, allowing for a comprehensive comparison to achieve the required minimum safety factor while minimizing structural weight. The research concludes that increasing the fillet radius is a more recommended approach compared to increasing wall thickness and cap thickness. The results indicate that Model 9, with wall thickness, cap thickness, and fillet radius dimensions of 10 mm, 25 mm, and 30 mm, respectively, is the optimal choice due to its lightweight construction.
Segregasi pada pengelasan baja paduan Hanif Hanif
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.v1i1.1390

Abstract

Pengelasan baja paduan adalah proses penyambungan antara dua logam a/au lebih dengan menggunakan elektroda dan disertai dengan energi panas Segregasi pada pengelasan disebabkanoleh ketidak paduan antara unsure-unsur yang ada pada logam induk dengan logam pengisi, hal ini dapat menyebabkan keretakan pada daerah HAZ.Pengaruh yang disebabkan oleh segregasi dapat menyebabkan terjadinya retak dalam keadaan dingin dan keadaan panas.
Analysis of Helical Gear Failure in Off-Road 4x4 Gearbox Husaini, Husaini; Darmawan, Haris; Ali, Nurdin -
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.v22i1.4648

Abstract

Surface failure is evident in helical gear in off-road 4x4 gearbox,requiring the identification ofroot causes.Therefore, this study aimed to explore the factors contributing to helicalgearfailure in off-road 4x4 vehicles. Initially, crack in helical gear wascaused by manufacturing or material defects during production or the heat treatment process, manifesting as inhomogeneities in the microstructure or other imperfections. Crack propagation possibly occurred due to continuous stress during off-road 4x4 usage, influenced by factors such as excessive loads, vibrations, or extreme off-road conditions.The exploration process began with a comprehensive set of analyses, including visual observation, hardness testing, chemical composition analysis, microstructure testing, and stress analysis. Subsequently, the material composition of gear was identified as high-carbon steel meeting AISI 1080 standards. Although the average surface hardness value was 95.49 HRB, which was slightly lower than AISI 1080, the microstructure comprised pearlite and cementite. Surface fracture observations revealedinitial crackthat propagated, leading to brittle fractures. The average stress intensity factor (KI)was alsomeasured 54.65 MPa.m1/2, which surpassed fracture toughness value (KIC) of AISI 1080 steel at 45.5 MPa.m1/2.In conclusion, helical gear failure was directly attributed to the propagation of initial crack, thereby resulting in fractures.
Rancang bangun alat penggongseng kelapa untuk pembuatan bumbu dapur dengan menggunakan pemanas listrik temperatur 800c dengan kapasitas 3 kg Hasrin Lubis; Al Fathir Abas
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.v14i1.297

Abstract

Proses pembuatan bumbu dapur masih tertinggal dalam hal teknologinya, misalnya dalam proses pemanasan kelapa, pada umumnya masih menggunakan kompor untuk melakukan pemanasan, dalam melakukan pemanasan sangat banyak mengalami kendala karena menggunakan kompor. Berdasarkan kendala yang terjadi, maka perlu merancang sebuah alat yang dapat membatu masyarakat dalam proses pemanasan (gongseng) kelapa, perancangan dilakukan dengan menggunakan pemanas listrik (heater) kelapa yang dapat di gongseng dengan lebih cepat dan sangat mempermudah pekerjaan di dapur. Proses untuk pembuatan kelapa gongseng dari kelapa yang telah diparut maka dilakukan beberapa metode penggongsengan serta pemanas menggunakan api dan sistem elemen pemanas menggunakan sumber energi listrik yang di ubah menjadi energi panas (energi kalor). Prinsip kerja dari alat gongseng kelapa ini terjadi didalam kuali yang di panas menggunakan elemen pemanas dengan suhu 800 C yang kemudian di aduk oleh mata pengaduk (mixing) dengan putaran 45 rpm yang ditransmisikan oleh gearbox dengan penggerak utama motor listrik dengan putaran 1420 rpm. Adapun elemen pemanas yang digunakan yaitu elemen pemanas dengan spesifikasi 750 watt dan temperature 800 C. Spesifikasi alat ± memiliki panjang = 760 mm, lebar = 760 mm, dan tinggi = 925 mm dan berat ± 55 kg dan bersifat portable, Hasil pengujian struktural dan fungsional yang telah dilakukan pada alat penggongseng kelapa ini dapat disimpulkan bahwa seluruh komponen bekerja sesuai dengan perencanaan.Kata Kunci : Elemen Pemanas, Pengaduk (Mixing), Portable.
Karakterisasi fisik dan kimiawi bentonite untuk membedakan natural sodium bentonite dengan sodium bentonite hasil aktivasi Cecep Ruskandi; Ari Siswanto; R Widodo
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.v18i1.1596

Abstract

Bentonit adalah mineral yang cukup luas penggunaannya baik dalam bidang pertambangan maupun sebagai pengikat pasir cetak dalam bidang pengecoran logam. Secara alami bentonite ada dua jenis yaitu Na bentonite (swelling bentonite) dan Ca bentonite (non swelling bentonite). Melalui aktivasi menggunakan Na2CO3 terjadi pertukaran kation Ca oleh Na sehingga dihasilkan Na bentonite hasil aktivasi (activated Na bentonit). Penelitian ini dilakukan untuk menemukan karakteristik pembeda antara Na bentonite yang alami terhadap Na bentonite hasil aktivasi menggunakan berbagai metode karakterisasi yaitu XRD, SEM/EDS, pengujian indeks Swelling, titrasi, serta uji reaksi identifikasi. Na bentonite alami diberi kode sampel A, sedangkan Na bentonite hasil aktivasi diberi kode sampel AC. Hasil pengujian XRD menunjukkan bahwa pada bentonite alami tersusun atas senyawa montmorrilonit dan senyawa yang mengandung Al, Si dan O. Bentonite hasil aktivasi tersusun atas senyawa montmorrilonit dan kwarsa. Hasil pengujian SEM/EDS menunjukkan bahwa Na bentonite hasil aktivasi memiliki morfologi permukaan butiran yang lebih halus daripada bentonite alami. Na bentonite alami ternyata memiliki nilai indeks swelling lebih besar daripada Na bentonite hasil aktivasi. Indeks swelling Na bentonite alami berkisar antara 29 – 35 ml, sedangkan indeks swelling bentonite hasil aktivasi berkisar antara 15 – 22 ml. Hasil pengujian titrasi mengindikasikan bahwa pada Na bentonite hasil aktivasi mengandung anion CO32- lebih banyak berdasarkan volume asam HCl yang terpakai dalam titrasi yaitu 2-10 ml dibandingkan Na bentonite alami yaitu 0,5 – 1 ml. Reaksi identifikasi anion menunjukkan pada Na bentonite hasil aktivasi terjadi gelembung gas yang tidak ditemukan pada sampel Na bentonite alami.Kata kunci : Na bentonite, alami, aktivasi, morfologi, indeks swelling, gelembungPhysical and chemical characterization of bentonite to distinguish natural sodium bentonite from activated sodium bentoniteAbstrackBentonite is a mineral that widely used both in the mining sector and in the foundry industry as a molding sand binder. Naturally, there are two types of bentonite namely Na bentonite (swelling bentonite) and Ca bentonite (non swelling bentonite). Through activation using Na2CO3, Ca cation is exchanged by Na cation resulting in activated Na bentonite. The study was conducted to find the distinguishing characteristics between natural Na bentonite against activated Na bentonite using various characterization methods, namely XRD, SEM / EDS, Swelling index testing, titration, and identification reaction tests. Natural bentonite Na is designated  as sample A, while activated bentonite Na is designated as AC. XRD test results showed that the natural bentonite is composed of montmorrilonite compounds and other compounds containing Al, Si and O elements. while the activated bentonite is composed of montmorrilonite and quartz. SEM / EDS test results that activated Na bentonite has a finer surface morphology than that of natural bentonite. Natural Na bentonite appears to have a swelling index value greater than that value of activated Na bentonite. The swelling index of natural Na bentonite ranges from 29 to 35 ml while it is of  activated Na bentonite ranges from 15 to 22 ml. The result of titration test indicate that the activated Na bentonite contains more CO32- anions based on the volume of HCl acid used in the titration which is 2-10 ml compared to natural Na bentonite which is 0.5-1 ml. Anion identification reaction shows that gas bubbles appear in activated Na bentonite while it did not in natural Na bentonite sampel.

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