Rekayasa Mesin
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.
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<![CDATA[Quality Function Deployment (QFD) and TRIZ in Briquette Cookstove Design and Simulation ]]>
<![CDATA[Faria, Niswatun]]>;
<![CDATA[Ummatin, Kuntum Khoiro]]>;
<![CDATA[Junianto, Mochammad Annas]]>;
<![CDATA[Budiharso, Tedy Eko]]>
<![CDATA[ Jurnal Rekayasa Mesin Vol 12, No 2 (2021) ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya ]]>
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DOI: 10.21776/ub.jrm.2021.012.02.12
<![CDATA[Poor cookstove design can harm the user's health and environment. This research aims to obtain an efficient cookstove design, environmentally friendly and operated easily. The cookstove design process using a combination of QFD and TRIZ. QFD able to capture customer needs through a questionnaire and interview. The data collected then processed to build a House of Quality (HoQ), one of the tools in QFD. QFD results in the design parameter of the briquette cookstove, which is incorporated in the concept design. The TRIZ method is utilized to understand the problem that might occur in the concept design and focus on solving the root causes. The next step is a detailed design where the dimensions, combustion chamber capacity, and supporting features are explained. The combination of QFD and TRIZ result in a briquette cookstove concept design which is easy to clean and operate. The combustion system is Top-lit Up-Draft (TLUD). The burning chamber has two air inlets, namely primary and secondary. The primary air inlet supplies the air from the bottom of the burning chamber, partially burns the briquette, and produces flue gas. The secondary air inlet is in the shape of an oval to supply air in the burning chamber's upper part to burn the flue gas completely. A complete combustion process will increase combustion efficiency and reduce emissions. A computational simulation shows the velocity distribution inside the burning chamber.]]>
<![CDATA[Simulasi Gaya Pemotongan pada Proses Bubut dengan Software Third Wave Advantedge ]]>
<![CDATA[Qoryah, Rika Dwi Hidayatul]]>;
<![CDATA[Sari, Herninda Ayu Meylinda]]>;
<![CDATA[Darsin, Mahros]]>;
<![CDATA[Mulyadi, Santoso]]>
<![CDATA[ Jurnal Rekayasa Mesin Vol 12, No 2 (2021) ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya ]]>
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DOI: 10.21776/ub.jrm.2021.012.02.17
<![CDATA[The cutting force that reacts to cutting tool and workpieces will result deflection. Deflection is the cause of product deviation and vibration sources that can shorten the life of the cutting tool. Simulation of machining process is carried out to get an estimate of cutting force in some machining process conditions., then compare it to the experiments. The research aims to find out the influence of spindle rotary speed, feed rate and depth of cut on cutting forces in turning process with cutting tool HSS and workpiece Al 6061. This research uses three-dimensional simulation method using Third Wave AdvantEdge software. Following by comparison between the simulation with the experiments results. The simulation was in accordance to the experiments in term of the magnitude of the forces, from the biggest they are tangential, axial, and radial force respectively. Cutting force will decrease with increased spindle turning speed. Cutting force will increase with the rising feed rate and depth of cut. However, the simalution still highly deviate from the experiments at the rate of 71%, 44.3%, and 21.3% for axial, radial and tangential forces respectively. The possible cause of these high errors relates to forces measuring method in experiments.]]>
<![CDATA[Performa Panel Surya 2 X 50 WP pada Mesin Panen Padi Mini Dua Lajur ]]>
<![CDATA[Susanto, Herdi]]>;
<![CDATA[Darsan, Herri]]>;
<![CDATA[Mukhlizar, Mukhlizar]]>;
<![CDATA[Fitriadi, Nuzuli]]>
<![CDATA[ Jurnal Rekayasa Mesin Vol 12, No 2 (2021) ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya ]]>
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DOI: 10.21776/ub.jrm.2021.012.02.8
<![CDATA[Rice harvesting machines that can be operated in swampy, peatland, narrow and can be operated and maintained by farmers, can be considered for design, some previous research has been carried out, including a two-lane mini rice harvester with a performance of 20.33 hours per hectare and has been in manufacturing and in performance tests. Experimental studies on engine performance were carried out in this research. This research uses 2x50 watt peak polycrystalline solar panels connected to a 12 volt 45 AH battery, the battery will drive a 50 watt electric motor. Current and voltage measurements are carried out on the solar panel and battery when in condition, first the solar panel is connected to the battery and not connected to the electric motor, the second solar panel is connected to the battery and connected to the electric motor, the three solar panels are not connected to the battery and the battery is connected to electric motor. The results of the first condition study indicate that the electric current will be more stable using a new battery, when compared to using a battery in the previous study. The second condition was that the performance of the two-lane mini rice harvester increased by 50% when compared to the performance of an electric motor using a battery that was not connected to a solar panel. The third condition shows the performance of the electric motor has increased by up to 300% when compared with the results of previous studies, it is estimated that the electric motor will continue to rotate for up to 8-10 hours]]>
<![CDATA[Pengaruh Campuran Bahan Bakar Biodiesel WCO - Diesel terhadap Karakteristik Api Hasil Pembakaran Spray Difusi pada Concentric Jet Burner ]]>
<![CDATA[Sukri, Sukri]]>;
<![CDATA[Sasongko, Mega Nur]]>;
<![CDATA[Widodo, Teguh Dwi]]>
<![CDATA[ Jurnal Rekayasa Mesin Vol 12, No 2 (2021) ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya ]]>
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DOI: 10.21776/ub.jrm.2021.012.02.22
<![CDATA[Biofuels from waste cooking oil (WCO) represent a sizable opportunity not only in terms of energy production but also as a way for sustainable development despite their low yield, higher viscosity, lengthy production time and cost. Alternatively, biodiesel can be blended at an appropriate blending ratio with convention diesel oils. The biodiesel and its blends is proved to give better emission characteristics than conventional diesel oils. This study aims to experimentally investigate the effect of the fuel blend on the combustion characteristics of  WCO biodiesel. The characteristic are the droplet size, flame height, flame width and temperature distribution. In this study, the blended fuel are B0 (Solar), B10, B20, B30, B40 and B100 (WCO biodiesel). Measurement and visualization of the combustion flame for each variation of the fuel mixture was were tested at different pressures, namely 4 bar and 5 bar. The experimental results show that the droplet size increases with increasing WCO concentration in the fuel; on the other hand, visualization and calculations show that the height and width of the flame of the fuel mixture decreases Observation on the temperature distribution shows that the WCO biodiesel mixture has the potential to increase the fire temperature at certain points]]>
<![CDATA[Pengaruh Proses Bubut Baja AISI 4140 terhadap Mental Workload dengan Metode NASA-TLX ]]>
<![CDATA[Rahmi, Meri]]>;
<![CDATA[Rachmatullah, Rachmatulllah]]>;
<![CDATA[Sukardi, Casiman]]>
<![CDATA[ Jurnal Rekayasa Mesin Vol 12, No 2 (2021) ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya ]]>
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DOI: 10.21776/ub.jrm.2021.012.02.13
<![CDATA[This study aims to analyze the mental workload with the experimental method when operating a lathe under two different conditions, namely by using cooling and without cooling. The material used as the specimen in this research is AISI 4140 material. Another important variable is the timing of the experiment in the morning and evening. This is related to the division of work shifts that often occurs in the manufacturing industry. The working time factor greatly affects work performance and vigilance at work. Based on the experimental results taken from 20 participants and processed with the NASA-TLX method, it shows that the mental workload in the lathe process with the addition of cooling is more significant than the lathe process without the addition of cooling, even though the data collection time is different. It is also directly proportional to the duration of the lathe process. So it can be concluded that the turning process is better to use cooling even on AISI 4140 Steel material because it does not require a high workload.]]>
<![CDATA[Potensi Serbuk Kayu Ulin dan Serbuk Bambu Sebagai Aplikasi Papan Partikel Ramah Lingkungan - Review ]]>
<![CDATA[Laksono, Andromeda Dwi]]>;
<![CDATA[Rozikin, Muhammad Nurhidayatur]]>;
<![CDATA[Safitri Pattara, Nur Aini]]>;
<![CDATA[Cahyadi, Ifdil]]>
<![CDATA[ Jurnal Rekayasa Mesin Vol 12, No 2 (2021) ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya ]]>
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DOI: 10.21776/ub.jrm.2021.012.02.4
<![CDATA[The wood and bamboo waste from the exploitation and industry are still not fully utilized where they are now being used as raw material for particleboard. The purpose of this narrative review is to find out the concept of particleboard, the mechanism of particleboard, and the potential for wood and bamboo powder in particleboard applications. The method of creating particleboard was using dehydrated sawdust and bamboo then pouring the powder with adhesive. In this narrative review, there are several types of adhesives which are Polyurethane Resin, Phenol-Formaldehyde (PF), Epoxy, Polystyrene Based Resin (PBR), and Unsaturated Polyester (UP). After molding powder and adhesive mixture, it was hot-pressed to make a particleboard product. Finally, the mixture was tested for the physical and mechanical properties of particleboard products based on Indonesian National Standard. The physical and mechanical properties are increases by particleboard with a proportion of 75%-100% teak wood (T. Grandis) and 25%-50% bamboo. It's known that ironwood has characteristics close to that of the teak species. Therefore, the ironwood and bamboo sawdust has the potential to be used as raw material for particleboard. And the recommended method based on the type of adhesive used is UP.]]>
<![CDATA[Performa pada Motor Bakar 6-Langkah dengan Langkah Power Ekspansi sampai Titik Mati Bawah ]]>
<![CDATA[Sepriyatno, Riswan]]>;
<![CDATA[Siswanto, Eko]]>;
<![CDATA[Hamidi, Nurkholis]]>
<![CDATA[ Jurnal Rekayasa Mesin Vol 12, No 2 (2021) ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya ]]>
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DOI: 10.21776/ub.jrm.2021.012.02.18
<![CDATA[This study aims are to observe the performance of a six-stroke combustion motor and to analyze the thermodynamics of a six-stroke combustion engine with a power expansion step to the bottom dead center. The fuel used in this observation is pertalite with a RON 90 value. The method used is a true experimental method, with independent variables, namely 35%, 40%, 45%, and 50% throttle openings with loading on the prony disc brake of 10 kg, 20kg, 30kg, 40kg, and 50kg. In the torque data, each throttle opening shows the highest number of 7.26 (Nm) with a load of 50kg and the lowest value of 2.01 (Nm) with a load of 10kg, for effective power the highest value is 8.47 (kW) at 50% throttle opening with load is 40kg and the lowest value is 2.49 (kW) at 35% throttle opening with a load of 10kg, while for the specific fuel consumption (SFC) the highest value is 4.28 (kg/Hp.h) at 40% throttle opening with a load of 10kg and the lowest value is 0.77 (kg/Hp.h) at 50% throttle openings with a load of 50kg, and for the thermal efficiency of the six-stroke motor, which means an average increase of 14.58% compared to the thermal efficiency of the conventional 4-stroke internal combustion engine.]]>
<![CDATA[Studi Karakteristik Stabilitas dan Konstruksi Kapal Berbahan High Density Polyethylene (HDPE) ]]>
<![CDATA[Kadhafi, Muammar]]>;
<![CDATA[Sunardi, Sunardi]]>;
<![CDATA[Triono, Agus]]>;
<![CDATA[Sari, Wahida Kartika]]>
<![CDATA[ Jurnal Rekayasa Mesin Vol 12, No 2 (2021) ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya ]]>
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DOI: 10.21776/ub.jrm.2021.012.02.9
<![CDATA[The development of fishing and marine tourism requires the support of naval architecture, especially in small boat. The use of wood as the main material for shipbuilding has recently become a problem considering the decreasing availability of wood, while the use of fiber is classified as less environmentally friendly because it uses chemical resin and difficult to repair when it breaks and cannot be recycled. The aim of this research is to design the High-Density Polyethylene (HDPE) boat. The design was carried out by using naval architect design software. The stability of boat was calculated by using three loading conditions such as when leaving the port, in the sea and when returning to the port. The International Maritime Organization (IMO) safety criteria was using to evaluation of boat stability where the three loading conditions have met the IMO standard. The construction of HDPE boat was carried out by using DNV rules.]]>
<![CDATA[Analisis Statis Konstruksi dan Lance Tube Sootblower Tipe Motorised Rotary Menggunakan Software Solidworks 2016 ]]>
<![CDATA[Felani, Ahmad]]>;
<![CDATA[Al-Janan, Dony Hidayat]]>
<![CDATA[ Jurnal Rekayasa Mesin Vol 12, No 2 (2021) ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya ]]>
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DOI: 10.21776/ub.jrm.2021.012.02.1
<![CDATA[Sootblower is a boiler support equipment that works to clean soot. Sootblower requires a strong construction to support the components in order to work optimally. Sootblower is also not free from several failures on its components, the main component that causes failure on the sootblower is the lance tube. This study aims to analyze the static construction and lance tube motorized rotary sootblower type sootblower using Solidworks software. The method used in this research is a simulation based on the finite element method. The material applied to the construction is St 37 and the material on the lance tube is ASTM A213 T92. The static simulation results show that the construction design of the angle iron measuring 35×35×6 mm has a max stress value of 57,50 N/mm2 that occurs in the bolt hole, a value of max displacement of 0,0146 mm on the rod supporting the bearing, and a factor of safety value of 4,08 so it is safe to use. Static simulation on the design of 40 NB diameter lance tube with four thickness variations shows the highest max stress value, the highest max displacement, and the lowest factor of safety occurs in the lance tube thickness of 10,2 mm, which has a max stress value of 276,24 N/mm2, max displacement of 335,53 mm and a factor of safety 1,59. Lance tubes with a thickness of 10,2 mm can be declared safe because the value of the factor of safety meets the minimum limit for static loading.]]>
<![CDATA[Pengaruh Variasi Bio Based Adhesive terhadap Kekuatan Peeling dan Shearing Kayu Pinus pada Adhesive Joint ]]>
<![CDATA[Ma’arif, Mochammad Syamsul]]>;
<![CDATA[Fadlurahman, Muhammad]]>;
<![CDATA[Anam, Khairul]]>
<![CDATA[ Jurnal Rekayasa Mesin Vol 12, No 2 (2021) ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya ]]>
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DOI: 10.21776/ub.jrm.2021.012.02.2
<![CDATA[The methods of joining engineering materials using adhesives is mostly implemented by using synthetic adhesives from non-renewable sources. Even though it has good joining performance, its poisonous nature and difficult to decompose naturally makes the adhesive needs to seek alternatives that are more environmentally friendly. Another reason is to support FAO campaigns for the use of environmentally friendly and biodegradable materials. One that has the potential to replace synthetic one is adhesives from natural sources such as gum rubber, jackfruit, and breadfruit. Because each natural sap has a different composition, the adhesive strength will also be different. Therefore it is necessary to examine the adhesive strength of each of these natural gums. In this research, natural adhesives (gums) and synthetic adhesives were used to joint pine wood as a test specimen. After joining, peeling and shearing tests on the specimens were carried out so that the mechanical strength of the joints for each adhesive variation was recognized. Fracture analysis was then performed to analyze the mechanism of joint failure for each adhesive variation. From this research, the highest peeling strength was obtained from rubber tree sap of 0.15 MPa, while the highest shearing strength was also obtained for rubber sap of 0.68 MPa.]]>
