cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
Redaksi Jurnal Rekayasa Mesin Jurusan Teknik Mesin Fakultas Teknik, Universitas Brawijaya Jl. MT. Haryono 167 Malang, Jawa Timur Indonesia 65145
Location
Kota malang,
Jawa timur
INDONESIA
Rekayasa Mesin
Published by Universitas Brawijaya
ISSN : 23381663     EISSN : 24776041     DOI : 10.21776/ub.jrm
Core Subject : Engineering,
Mechanical Engineering
Rekayasa Mesin is published by Mechanical Engineering Department, Faculty of Engineering, Brawijaya, Malang-East Java-Indonesia. Rekayasa Mesin is an open-access peer reviewed journal that mediates the dissemination of academicians, researchers, and practitioners in mechanical engineering. Rekayasa Mesin accepts submission from all over the world, especially from Indonesia. Rekayasa Mesin aims to provide a forum for national and international academicians, researchers and practitioners on mechanical engineering to publish the original articles. All accepted articles will be published and will be freely available to all readers with worldwide visibility and coverage. The scope of Rekayasa Mesin are the specific topics issues in mechanical engineering such as design, energy conversion, manufacture, and metallurgy. All articles submitted to this journal can be written in Bahasa and English Language.
Arjuna Subject : -
Articles 965 Documents
 88   89   90   91   92 
PERFORMANSI MESIN DIESEL MENGGUNAKAN BIODIESEL DARI CAMPURAN BIJI KARET-MINYAK PIROLISIS LIMBAH PLASTIK-MINYAK SOLAR Sitorus, Tulus Burhanuddin; Tambunan , Bisrul Hapis; Sihombing , Hendrik Voice; Ambarita, Himsar
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.1765

Abstract

This research examines the performance of a Diesel engine that uses alternative fuel biodiesel from a mixture of rubber seeds with plastic waste pyrolysis and diesel oil. The plastic waste used is plastic bottle caps, which are processed by pyrolysis to obtain oil. One of the objectives of mixing biodiesel with plastic waste pyrolysis oil is to increase the calorific value of rubber seed biodiesel. The calorific value of rubber seed biodiesel is 39.95 kJ/kg, and the calorific value of plastic waste pyrolysis oil is 46.55 kJ/kg. Mixing rubber seed biodiesel with plastic waste pyrolysis oil increases the calorific value of rubber seed biodiesel by around 9.63%-13.63%. Experimental results show that there is a reduction in exhaust emissions when using biodiesel for opacity of 7.51-66.08%, CO 12.5-50%, HC 7.14-62.96% and an increase in CO2 emissions of around 3.08-84.62%. Tests using biodiesel were carried out without modifying the Diesel engine.
ANALISIS FOTO MAKRO TERHADAP KEKASARAN BAJA ST 60 HASIL PEMBUBUTAN FACING DI MESIN CNC HARDINGE Syaiful, Syaiful; Panggabean, Hasbullah
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.1766

Abstract

Technological advances have made the manufacturing sector an industry that needs to develop and compete globally, one of which is CNC machines which produce quality products for industrial needs. In producing a material at CNC machine, the latest design software is needed, namely Autodesk Fusion 360. Apart from lest, on then machine processing, it is desired to produce a material surface with a good roughness value. The desired result of this research is to analyze roughness value towards facing turning results on CNC machines for variations in spindle speed, namely 410 rpm, 450 rpm, 660 rpm, 900 rpm, 1100 rpm and 1200 rpm using carbide chisels and dromus coolant. The roughness of the facing surface can be assessed using a Surface Roughness Tester and analyzing the material structure using macro photos. The results of specimen testing showed that the smallest roughness value occurred of a spindle speed of 1200 rpm with a value of Ra = 0.810 µm and the output of observations make use macro photos represent that the roughness structure of the material was very smooth compared to the production process on CNC machines using other spindle speeds.
REVIEW ON RAMS ANALYSIS FOR RAILWAY VEHICLES WITH POTENTIAL APPLICATION IN RAILWAY SYSTEM OF INDONESIA Muzakki, Sofyan; Gunawan, Leonardo; Rachman Setiawan; Kariem, M. Agus
Jurnal Rekayasa Mesin Vol. 15 No. 3 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i3.1781

Abstract

Railway vehicles are critical for ensuring the reliability and safety of trains, and their complexity has grown with technological advancements. RAMS analysis (Reliability, Availability, Maintainability, and Safety) has become a popular method for assessing the functional requirements of these vehicles. This review specifically investigates RAMS analysis for railway vehicles, aiming to identify trends, developments, key research challenges, and potential application in railway system of Indonesia. By thoroughly reviewing relevant articles, it explores various aspects of RAMS analysis, conducts comparative analyses, discusses potential research directions, and highlights advancements and usage in railway vehicle contexts. The methodology involves formulating research questions, searching the Scopus database for records, and applying assessment criteria to select eligible articles. Results reveal recent developments, distribution of articles, and studies focusing on reliability, availability, maintainability, and safety. This review offers valuable insights into the current state of RAMS analysis for railway vehicles and guides future research and development in this area.
ANALISIS PERFORMA RDF DENGAN PEREKAT LIMBAH ORGANIK UNTUK MEMENUHI STANDAR MUTU INDUSTRI Tambunan, Alvian; Prawoto, Prawoto; Hardiyanto , Catur
Jurnal Rekayasa Mesin Vol. 15 No. 3 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i3.1782

Abstract

This study aims to obtain RDF adhesives made from organic waste and to determine the effect of adhesives on RDF performance. The method used in this research is the experimental method. The data analysis technique used is descriptive quantitative. The various types of adhesives used are waste banana peels, cassava peels, and cocoa peels. The ratio of the composition of RDF and adhesive waste is 9:1 mass unit. RDF material is mashed and filtered using mesh 10, after being mixed with adhesive then pressed with pressure 5; 7.5; 10; and 12.5 bar, then dried in an oven at 150 0C for 3 hours and dried in the sun for two days. RDF testing was carried out by proximate for water content and ash content, by bomb calorimeter for calorific value, and by Shore Hardness Test for hardness. The results showed that waste banana peels, cassava peels, and cocoa peels can function as RDF adhesives for organic waste and meet industry standards, replacing plastic or flour-type adhesives that have been used so far. The calorific value, moisture content, and ash content of RDF with the three adhesives were (5495.410 cal/g, 7.78%, and 16.74%) for banana peel adhesive, (6068.007 cal/g, 6.18%, and 17.14%) for cassava peel adhesive and (5,504.438 cal/g, 5.36%, and 17.19%) for cocoa shell. The results of the hardness test of RDF materials with the three adhesives each with variations in pressure showed (6 Shore D 5 bar, 8.5 Shore D 7.5 bar, 13 Shore D 10 bar, and 19 Shore D 12.5 bar) for banana peel adhesive, (6.5 Shore D 5 bar, 10 Shore D 7.5 bar, 14 Shore D 10 bar, and 20 Shore D 12.5 bar) for cassava peel adhesive and (8 Shore D 5 bar, 12 Shore D 7.5 bar, 18 Shore D 10 bar and 24 Shore D 12.5 bar) for cocoa shell adhesive.  
ANALISIS KUALITAS GAS BUANG PADA STEAM BOILER BERBAHAN BAKAR BIO-SOLAR DAN BATU BARA Ar Rasyid, Moh. Rizal; Anis, Samsudin; Susanto, Susanto; Danang, Setio Wardana
Jurnal Rekayasa Mesin Vol. 15 No. 3 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i3.1783

Abstract

Steam boilers fueled by biodiesel and coal are one of the industrial activities that still produce exhaust emissions such as Total Particulate (PM), Sulfur Dioxide (SO2), Opacity, Nitrogen Oxide (NOx), and Carbon Monoxide (CO) which is very dangerous for public health and the environment. Therefore, analysis of flue gas emissions in steam boiler installations equipped with filtration devices (cyclones, water scrubbers, and electrostatic precipitators) before being discharged into the environment is of important. Exhaust gas emission was measured by using a gas analyzer, smoke tester, and portable quality air monitor. The results of exhaust gas emission analysis showed that the average concentration of PM, SO2, and CO did not meet the specified emission quality standard thresholds, exempted for opacity concentration for both steam boilers fueled with biodiesel and coal. It is suspected that this is caused by the sub optimal performance of the filtration equipment used in this system. Therefore, regular maintenance is required, and if necessary, a redesign of the entire system can be carried out.
OPTIMASI DESAIN SHELL AND TUBE HEAT EXCHANGER TIPE SINGLE SEGMENTAL BAFFLE DENGAN VARIASI JUMLAH BAFFLE DAN POTONGAN BAFFLE MENGGUNAKAN METODE COMPUTATIONAL FLUID DYNAMIC Fajri, Ahmed; Saputra, Trisma Jaya; Dewi, Rany Puspita
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.1793

Abstract

The heat exchanger is a device used to transfer heat between two process streams. In general, the flow that occurs in shell and tube heat exchangers is parallel flow or counter flow. To change the flow in the shell and tube heat exchanger into the cross flow, baffles can be added. The ideal cutting for baffle cutting is taken 20% to 35% of the inner diameter of the shell while the baffle distance is one-fifth of the inside diameter (ID) of the shell or 2 inches. Shell type "E" consists of 9 tubes with a 45° square pattern arrangement and single segmental baffle type with different orientations of baffle spacing and cuts 6, 8, 10 baffles and 25% and 30% of the shell inner diameter. CFD simulation results were obtained in the form of temperature distribution contours, pressure flow profile. The analysis shows that a properly selected baffle spacing and cut has the maximum potential to improve the heat exchanger performance up to 59.15%, as shown in the heat exchanger with 10/25% configuration. Increasing the number of baffles can increase the effectiveness-NTU by about 11% to 13%, while the same baffle spacing with different baffle cuts shows that 30% baffle cuts can reduce the pressure drop problem by about 8% to 11% compared to 25% baffle cuts.
COMPARISON OF THE ACTIVATION OF GIGANTOCHLOA APUS TO INCREASE THE ADSORPTION ABILITY OF MEDICAL LIQUID WASTE Setyarini, Putu Hadi; Iksandy, Jemmie; Fachrezi, M. Qashmal; Sonief, Achmad As'ad
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1796

Abstract

Medical facilities are exposed to substantial health and safety hazards as a result of the existence of perilous substances such as germs, viruses, and mold. The integration of drug use courses in medical education is hindered by constraints such as time limitations, a scarcity of well-informed personnel, and insufficient institutional backing. In order to mitigate these dangers, a comprehensive assessment of the risks, effective instruction, and stringent procedures are required. Effective waste management systems and precise detection of influent are crucial. Activated carbon, a highly porous material, is extensively utilized as an adsorbent in several industrial applications. Bamboo charcoal, a desirable lignocellulosic substance, is employed in the manufacturing process of activated carbon. The objective of the study was to generate and examine activated carbons obtained from Gigantochloas Apus (GA) through the utilization of sodium hydroxide (NaOH) and sodium chloride (NaCl) activation methods. The study determined that was the most efficient activating agent for achieving ideal ash content characteristics, resulting in the lowest ash percentage of 6.21%. The acidity of medical liquid waste is increased and its adsorption duration is extended by activating GA with NaCl and NaOH.
PERANCANGAN ALAT PENCEKAM UNTUK PEMESINAN POLYURETHANE FOAM PADA PROSES FACE MILL CUTTING MESIN CNC ROUTER 3 AXIS DENGAN METODE VDI 2221 Utomo, Archi Kun Cahyo; Ubaidillah, Ubaidillah; Raharjo, Wijang Wisnu; Fitrian Imaduddin; Dikky Kusuma Wijaya
Jurnal Rekayasa Mesin Vol. 15 No. 3 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i3.1798

Abstract

Due to the highly brittle structure of polyurethane (PU) foam, a specialized clamping mechanism is required to consider the material's strength and hardness to avoid damaging the workpiece and to withstand the cutting forces during milling and machining. Using a polymer as an alternative for creating clamping tools with characteristics similar to PU foam offers a promising solution. The slightly harder polymer material is expected to address the need for a gripping tool that will not harm the PU foam upon application. The VDI 2221 method, a structured approach to the design and coordination of evolving design techniques, is employed in this study. The advantage of this methodology lies in its ability to adapt continuously through research. A comparative analysis of two design models produced via 3D printing reveals that Design 5 exhibits superior strength under increased stress. Moreover, Design 5 is more effective in gripping the workpiece, as a single gripper can withstand cutting forces from two directions simultaneously, reducing material deformation. This advancement is expected to minimize the risk of material damage during the machining process. This research's novelty lies in applying an optimized polymer clamping device for PU foam, ensuring improved performance and reduced damage during machining.
PENGARUH PARAMETER PEMESINAN TERHADAP KEKASARAN PERMUKAAN AI6061BE PADA PEMESINAN CNC MINI 500 WATT MENGGUNAKAN PAHAT KARBIDA STRAIGHT ENDMILL Napitupulu, Richard A. M.; Perangin angin, Siwan E.A.
Jurnal Rekayasa Mesin Vol. 15 No. 3 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i3.1812

Abstract

The role of automatic machining with the help of computer programming such as Computer Numerically Controlled (CNC) has become commonplace today in both large and small industrial sectors or micro industry. CNC is a manufacturing process where previously programmed computer software is converted into code that can automate machining movements, one of which is the milling or lathe process. CNC performance is determined by machining output power. For micro industrial or laboratory scale, CNC with low power is usually used to cut soft materials such as wood, acrylic, aluminum and others. This is the basis for this research to look at the influence of machining parameters such as speed, depth of cut and feed rate on the surface roughness (Ra) of AI6061BE aluminum workpieces in the dry machining process on a mini CNC unit with a maximum spindle power of 500 watts. This research uses an experimental design based on the Taguchi method and takes the form of an L16 (43)  orthogonal matrix. The chisel used is a Straight End Mill 2 fluke carbide chisel. The experiment was carried out 4 times cutting in the positive x-axis direction and 4 times in the negative x-axis direction for each variation of machining parameters. From the test results, surface roughness, feed rate is a parameter that is more influential than speed and depth of cut.
PERILAKU OKSIDASI ISOTERMAL PADUAN 68,5Fe-14Ni-9Al-7,5Cr-1Mo PADA TEMPERATUR 800, 900, DAN 1000°C Muhammad, Fadhli; Basuki, Eddy Agus
Jurnal Rekayasa Mesin Vol. 15 No. 3 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i3.1814

Abstract

Extensive research has been conducted on high-temperature alloys for power generation, with chromium-forming ferritic iron as the primary basis for these materials. However, the practical applications of these materials are limited to temperatures below 800°C. This study addresses the development of an alumina-forming 68.5Fe-14Ni-9Al-7.5Cr-1Mo austenitic iron-based alloy, isothermally oxidized at 800, 900, and 1000°C for 1, 10, 50, and 150 h, respectively. The formation of the protective layer was characterized using X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS) attached in a scanning electron microscope (SEM). The thickness of the oxide layer was quantified using the ImageJ software. XRD analysis of the sample that had been oxidized for 150 h at various temperatures revealed the presence of Al2O3. The clustered grain morphology was observed at the sample's surface oxidized for 150 h at 800°C. In contrast, the sample oxidized at 900°C exhibited a hair morphology, and the sample oxidized at 1000°C exhibited a wrinkled morphology. EDS mapping of all samples revealed that O and Al dominated the oxide scales. Measurements of oxide thickness indicated an accelerated growth phase during the first 10 hours of exposure, which was subsequently followed by a gradual slowing down in growth rates over more extended periods of time

Page 90 of 97 | Total Record : 965

 88   89   90   91   92 

Filter by Year

2010 2025


Reset
Filter By Issues
All Issue Vol. 16 No. 3 (2025) Vol. 16 No. 2 (2025) Vol. 16 No. 1 (2025) Vol. 15 No. 3 (2024) Vol. 15 No. 2 (2024) Vol. 15 No. 1 (2024) Vol. 14 No. 3 (2023) Vol. 14 No. 2 (2023) Vol. 14 No. 1 (2023) Vol. 13 No. 3 (2022) Vol. 13 No. 2 (2022) Vol. 13 No. 1 (2022) Vol 12, No 2 (2021) Vol 12, No 1 (2021) Vol 11, No 3 (2020) Vol 11, No 2 (2020) Vol 11, No 1 (2020) Vol 10, No 3 (2019) Vol 10, No 2 (2019) Vol 10, No 1 (2019) Vol 9, No 3 (2018) Vol 9, No 2 (2018) Vol. 9 No. 1 (2018) Vol 9, No 1 (2018) Vol 8, No 3 (2017) Vol 8, No 2 (2017) Vol 8, No 1 (2017) Vol 7, No 3 (2016) Vol 7, No 2 (2016) Vol. 7 No. 2 (2016) Vol 7, No 1 (2016) Vol 6, No 3 (2015) Vol 6, No 2 (2015) Vol 6, No 1 (2015) Vol 5, No 3 (2014) Vol 5, No 2 (2014) Vol 5, No 1 (2014) Vol 4, No 3 (2013) Vol 4, No 2 (2013) Vol 4, No 2 (2013) Vol 4, No 1 (2013) Vol 3, No 3 (2012) Vol 3, No 3 (2012) Vol 3, No 2 (2012) Vol 3, No 1 (2012) Vol 3, No 1 (2012) Vol 2, No 3 (2011) Vol 2, No 2 (2011) Vol 2, No 1 (2011) Vol 1, No 3 (2010) Vol 1, No 2 (2010) Vol 1, No 1 (2010) More Issue