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INDONESIA
Jurnal Teknik Mesin Indonesia
Published by Badan Kerja Sama Teknik Mesin
ISSN : 1907350X     EISSN : 25977563     DOI : -
Core Subject : Engineering,
Aerospace Engineering Automotive Engineering Control & Systems Engineering Industrial & Manufacturing Engineering Mechanical Engineering
Jurnal Teknik Mesin Indonesia “JTMI” " adalah jurnal ilmiah sains dan teknologi yang diterbitkan oleh Badan Kerjasama Teknik Mesin Indonesia. JTMI meliputi bidang konversi energi, material, desain mekanikal, manufaktur dan otomasi
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 291 Documents
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Measurement of the Adhesion of PCL/Hydroxyapatite Nanofibrous Composite Coatings in Relation to the Roughness of Metal Implant Materials Nasution, Ahmad Kafrawi; Sunaryo, Sunaryo; Gunawan, Rendy
Jurnal Teknik Mesin Indonesia Vol. 19 No. 2 (2024): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v19i02.744

Abstract

Composite coatings have been widely used to modify the surface of materials to improve material properties alongside chemical modification, ion implantation, anodic oxidation, physical vapor deposition, chemical vapor deposition, plasma spray deposition, sol-gel, and thermal oxidation. Modifying the surface coating of bio-implants must employ suitable materials to enhance the interaction between bone cells and the material and provide structural support for forming new tissue. Coating requirements in metal implant material engineering include fiber diameter, porosity, mechanical properties (adhesion), biodegradability, and bioactivity. This study's most recent innovation consisted of modifying the bio-implant surface layer with a polymer (polycaprolactone, PCL) and bioactive ceramic (hydroxyapatite, HA) to meet the requirements of metal implant material application. During the spraying procedure, parameters derived from previous studies are used to determine fabrication parameters. In addition, the adhesion (mechanical properties) will be measured at multiple levels of implant material roughness. The results indicate that the rougher surface of the substrate has a higher adhesion value than the finer surface of the material.
Analisis Termal Proses Pengeboran Tulang dengan Metode Statistik Full Factorial untuk Pengontrolan Nekrosis Tulang Harun, Suryadiwansa; Burhanuddin, Yanuar
Jurnal Teknik Mesin Indonesia Vol. 19 No. 2 (2024): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v19i02.746

Abstract

Bone drilling is processing to create holes in bone when joining fractured bone parts with bolts. The bone temperature can increase during the bone drilling, causing necrosis and reducing stability and fixation strength. The temperature of bone necrosis can be controlled by applying the appropriate bone drilling parameters. This study experimentally examines the effect of drilling parameters on the temperature during bone drilling using the full-factorial design method. The material test was bovine bone, which its mechanical properties similar to human bone. The bone temperature was measured using two temperature-measuring instruments: a thermocouple (K type) and a Thermal Camera. The study results show that the drill speed and diameter significantly impact the temperature of bone and bone chips. The Increasing in drill speed and diameter increased the bone temperature. The temperature of bone necrosis (>47oC) was found mainly in bone chips when the drill speed was 2800 rpm, and the drill diameters were 4 and 6 mm. The bone temperature prediction model was also made with a correlation value of about 80-90% and an absolute error rate of about 5-7%, so that can be declared accurate in predicting the bone temperature. This model will later help control the temperature of bone necrosis
Modeling Muscle Activities of Squat Motion using OpenSIM Mihradi, Sandro; Ferryanto, Ferryanto; Harjanto, Samuel J.
Jurnal Teknik Mesin Indonesia Vol. 19 No. 2 (2024): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v19i02.756

Abstract

Human beings need to be able to monitor their muscle health. Muscle health can be assessed by directly measuring its signal using an electromyography sensor or, recently, from a musculoskeletal modeling software such as OpenSIM. OpenSIM is an open-source platform for modeling, simulating, and analyzing the neuromusculoskeletal system. This work aims to simulate muscle forces during squat movement using OpenSIM simulation and validate the results using electromyography sensors attached to the body. The squat movement data generated from the optical motion capture system and the force plate will be used as inputs for the OpenSIM software. OpenSIM can provide output, such as a graph of the working muscle forces. That graph will be compared and analyzed with a surface electromyography sensor results graph. Based on the analysis results, the chart of working muscle forces generated by the OpenSIM software has shown a similar trend to the graph of muscle activity resulting from surface electromyography sensor reading. Therefore, the simulation results from the OpenSIM software were validated, and it was implied that the data collection process and the modeling were done correctly.
Investigation of Gnetum Gnemon and Ramie Natural Fiber on the Mechanical Properties of Composites with the Combination of Aramid and Carbon Fiber as Reinforcement for Military Personnel Applications Ariesta, Annisa; Ferriyanaa, Muammar Pierre A.; Bhiftime, E. I.
Jurnal Teknik Mesin Indonesia Vol. 19 No. 2 (2024): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v19i02.757

Abstract

Every equipment infrastructure in a TNI unit will be needed to support an operation in the defence system to maintain the integrity of the Unitary State of the Republic of Indonesia. Personal protective equipment is needed for a war operation’s safety or continuity. Protective components made from composite fibers have the advantage of being resistant to corrosion caused by the environment. The natural and carbon fibers will be mixed/reinforced with epoxy resin to become composite materials. This study aims to identify Gnetum Gnemon fiber composites with carbon fiber and aramid fiber to determine the mechanical properties of the composite material resulting from a collision. Natural fiber Gnetum gnemon has not been widely studied as a reinforcing material for polymer composites. Gnetum gnemon fiber chemical composition is hemicellulose approx. 25%, 40% alpha cellulose, 10% lignin and 3-5% benzene extractive. Its density is quite light, 1.2087 g/cm³ - 1.8069 g/cm³. Because this fiber has a continuous fiber structure and a strong natural weave, its use is still minimal. Special treatment such as alkali treatment on Gnetum gnemon, can increase the strength of natural fibers. Due to its exceptional mechanical properties, Kevlar or aramid fibre are extensively used in industrial and military applications. The aramid fiber exhibited a transversely anisotropic nature in a small strain range, with its stress-strain behavior as linear and elastic. The anisotropic nature of the aramid fiber was due to its high tensile-to-shear modulus ratio. The high strength and modulus were also found to be scattered due to the larger distribution of defects in the longer fiber. Epoxy resin is a type of polymer characterized often by one or more epoxide functional groups, with at least one of the epoxide functional groups acting as a monomer and terminal unit of the polymer within the structural chain.
Optimization of Hammer-Disc Mill Parameters During Producing Gluco-mannan Flour Using Taguchi Method Ibrahim, Gusri Akhyar; Burhanuddin, Yanuar; Hamni, Arinal; Tanti, Novri; Wibowo, Muhammad Pandu; Valiandra, Tito
Jurnal Teknik Mesin Indonesia Vol. 19 No. 2 (2024): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v19i02.758

Abstract

Porang tubers contain glucomannan, which has health benefits for the human body. However, glucomannan also contains calcium oxalate, which is toxic. A Hammer-Disc mill (HDM) machine was used to separate glucomannan and calcium oxalate, categorized as a mechanical process. This study aims to optimize the parameters of the Hammer-Disc Mill machine for producing glucomannan flour by using the Taguchi Method. The selected parameters are the mass of the porang chip, motor rotation speed, and the distance of the hammer blades. The Taguchi Method was used to design an experiment using the Orthogonal Array L9 (3 factors, 3 levels). In this study, statistical analysis was carried out using Analysis of Variance (ANOVA) to determine each parameter's effect on glucomannan production. The glucomannan granules were taken using a screener of 60-80 mesh. The results show that the input mass parameter of porang chips significantly affects the glucomannan produced, which, F calculating 10,91 was more than f Table 5,41. The contribution of mass input of porang chips in percentage is 85.36%. Based on the results of the best response, the optimal condition for the production of glucomannan flour is to use a mass of 1 kg of porang chip input (level 3), motor rotation speed of 3000 rpm (level 3), and hammer spacing of 1 cm (level 3). By optimizing this parameter it is expected to increase the yield of glucomannan produced by the Hammer-Disc Mill machine.
Karakteristik Pembakaran Droplet Campuran Metil Oleat – Etanol dengan Penambahan Multi -Walled Carbon Nanotubes Yuliati, Lilis; Hamidia, Nurkholis; Ibadurrohman, Ibrahim Ahmad; Pujohastarto, Ilham Ridwan
Jurnal Teknik Mesin Indonesia Vol. 19 No. 2 (2024): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v19i02.759

Abstract

This research intended to investigate the combustion characteristics of methyl oleic – ethanol blend with OH functionalized multi-walled carbon nanotubes (MWCNT-OH) addition. Methyl oleic is an unsaturated fatty acid methyl ester, which is a constituent of various biodiesels. The observed fuel was a mixture of Methyl oleic with 20% vol of ethanol. MWCNT-OH content was varied by 100 ppm, 200 ppm, 300 ppm, 400 ppm, and 500 ppm (wt based). The presence of ethanol in the droplets is intended to promote the microexplosion phenomenon, generating smaller droplets and a shorter burning time. The experimental results show that the MWCNT-OH addition on the droplet of Methyl oleic – ethanol blend decreased the ignition delay and droplet burning time, while the constant burning rate and droplet temperature (and flame temperature) were increased. Reducing ignition delay time due to the higher thermal conductivity of nanofluid droplets results in more effective heat absorption from the environment and better heat transport inside the droplet. Hence, droplet vaporization, flammable mixture formation and ignition occur in a shorter time. Furthermore, this condition encourages a higher burning rate and a lower droplet burning time. The higher droplet and flame temperatures are related to the higher heating value of the methyl oleic – ethanol – MWCNT-OH mixture and higher droplet burning rate, which results in a higher heat release rate.
Optimizing Hot Embossing of Poly(methyl methacrylate) Microfluidic Chip Whulanza, Yudan; Dhira, Pandya; Haryadi, Deni; Soemardi, Tresna P.
Jurnal Teknik Mesin Indonesia Vol. 19 No. 2 (2024): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v19i02.760

Abstract

Microfluidic research become a more important research field in mechanical and bioengineering fields. The application of microfluidic positively relates to the ability to manufacture micro or precision. Nowadays, the manufacturing in this area is aimed at around 100-500 µm. Here, a hot embossing method is reported to realize microchannel with height and width dimensions of 150-300 µm and 600-800 µm, respectively. This study also shows that the margin factor between the mould/dies to the realized dimension is 50-70% and 5-7% for height and width, respectively.
Review dan Demo Slot dengan Scatter Hitam Berdasarkan API 5000 Menggunakan Variable Mahjong Ways Hermawan, Hana; Wulandari, Winda
Jurnal Teknik Mesin Indonesia Vol. 15 No. 1 (2020): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v15i1.138

Abstract

Mahjong Ways merupakan produk samping dari produksi PG Soft dengan rasio terkandung dalam slot rtp 98.3%. Mahjong Slot dapat dimanfaatkan untuk dijadikan lahan cuan dengan teknologi pengolahan proses anaerobic menggunakan akun percobaan/Demo Slot Scatter Hitam (WARGABET). Tujuan dari penelitian ini adalah melakukan review dan demo slot dengan Scatter Hitam berdasarkan standard Indonesia Petroleum Institute yaitu API 5000: menggunakan variable Mahjong Ways untuk menentukan ketebalan minimum pada setiap shell tergantung pada kedalamannya, sehingga setiap shell dapat memiliki ketebalan yang berbeda sehingga dapat memperkecil volume material dan biaya. Kemudian dilakukan simulasi dengan metode demo slot hingga dengan beban dari tekanan hidrostatik yang menghasilkan tegangan maksimum 154.88 MPa, serta deformasi maksimum 5 mm dan beban dari gaya angin yang menghasilkan tegangan maksimum 1.31 MPa, serta deformasi maksimum 0.5 mm, lalu dibandingkan dengan sifat mekanik material bahwa yield strength terjadi pada tegangan 250-395 MPa sehingga tebal shell hasil perhitungan adalah aman. Kemudian dibandingkan ketebalan minimum hasil perhitungan dengan desain konstruksi yang hasilnya adalah desain konstruksi memiliki tebal yang lebih besar dari perhitungan tebal minimum sehingga desain konstruksi yang akan dipakai adalah aman.
Studi Kasus Perancangan Rangka Motor Listrik Tipe Naked Bike Menggunakan ANSYS Putra, Arya Pratama; Basuki, Budi; Sugiyanto; Wibowo, Setyawan Bekti
Jurnal Teknik Mesin Indonesia Vol. 20 No. 1 (2025): Vol. 20 No. 1 (2025): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v20i1.482

Abstract

The function of the frame on the electric motorcycle is to support the rider's load and where several motor components are combined, and also acts as the basic form of the motorcycle itself. The design of the electric motorcycle frame design also needs a finite element analysis. The analysis computes and produces formulas to estimate the actions that can be performed on the object, where this method involves dividing the structure into smaller elements connected by nodes or in other words, the discretization of elements. The objective of this research is to analyze the yield strength level of the electric motorcycle frame design under static loading conditions in accordance with the load safety standards of two-wheeled vehicles in Indonesia. The subject of this research is an electric motorcycle frame design with a naked bike frame type. The material used in the frame is aluminum alloy 6061 T6. The total loading during simulation is 265 kg. The quality of element discretization obtained in the electric motorcycle frame design is 0,278 with the size of each element of 5,5 mm. The maximum von Misses stress obtained is 125,3 MPa with a maximum deformation of 0,08618 mm and the safety factor is 2,154. The results of this study provide a statement that the electric motor frame design is able to withstand the load during simulation.
Analisis Aerodinamika Pada Pesawat Nirawak MEGANTARA Menggunakan Metode CFD Hakim, Habib; Darmawan, Steven; Widya Utama, Didi; Edward, Benedictus
Jurnal Teknik Mesin Indonesia Vol. 19 No. 2 (2024): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v19i02.610

Abstract

The fundamental mechanics of a moving body through a fluid dictates that a body will experience a force acting opposite as a result of friction with the fluid molecules being moved away by the body. This phenomenon can be very complex and unpredictable when it is observed in an experimental setting. By using numerical solutions with the available advancements in fluid simulation software, The flow of the fluid over a body can be observed in a much better light through CFD simulation. In this research, the aerodynamic characteristics of the unmanned aircraft “MEGANTARA” will be simulated using ANSYS Fluent 2023 R2. With the speed variatons of 22,2 m/s; 27,7 m/s; 33,3 m/s; 38,8 m/s; 44,4 m/s; and 55,5 m/s which represents the take off, cruise, and maximum speed. the results will include the coeffitient of lift, drag, and the visualisation of fluid flow through the object, which will hopefully bring a better understanding of the air flow and can become a valuable input for future competitions.

Page 26 of 30 | Total Record : 291

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