International Journal of Mechanical Engineering Technologies and Applications (MECHTA)
International Journal of Mechanical Engineering Technologies and Applications (MECHTA) is published by Mechanical Engineering Department, Engineering Faculty, Brawijaya University, Malang, East Java, Indonesia. MECHTA is an open-access peer-reviewed journal that mediates the dissemination of academicians, researchers, and practitioners in mechanical engineering. MECHTA accepts submissions from all over the world, especially from Indonesia. MECHTA aims to provide a forum for 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 MECHTA is specific topics issues in mechanical engineering such as design, energy conversion, manufacture, and metallurgy. All articles submitted to this journal can be written in the English Language.
Articles
244 Documents
<![CDATA[Identification of Occupational Accident Risks in Nanomaterial Laboratories in Higher Education Based on Human Factors ]]>
<![CDATA[Kustono, Djoko]]>;
<![CDATA[Puspitasari, Poppy]]>;
<![CDATA[Irsyad, Muhammad Al]]>;
<![CDATA[Nursabrina, Aisya]]>;
<![CDATA[Adesta, Erry Yulian Triblas]]>
<![CDATA[ International Journal of Mechanical Engineering Technologies and Applications Vol. 2 No. 1 (2021) ]]>
Publisher : <![CDATA[Mechanical Engineering Department, Engineering Faculty, Brawijaya University ]]>
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DOI: 10.21776/MECHTA.2021.002.01.12
<![CDATA[The article describes a concept of health and safety to conduct research in Nanomaterial Laboratory in Two Public University in Malang, East Java, Indonesia. The utilization of nanomaterials in the world of education has been done in two universities in Malang, namely Malang State University and Brawijaya University. The nanomaterial laboratory as a means for research and development of nanomaterial science that often creates hazards and risks of work accidents for its users, but things that are often not realized. Dangers and risks of work accidents caused by the absence of standards. This research focuses on hazards and accidents in the nanomaterial laboratory using the HIRA (Hazard Identification and Risk Assessment) method, which is then followed by a variety of independent variables. The population in this study were nanomaterial researchers at two universities in Malang. Based on the results of trials between respondents 'competency expertise with the level of risk of workplace accidents in the nanomaterial laboratory obtained p- value 0.00 (<0.05), meaning that there is a significant relationship between the respondents' scientific conservation and the level of work accident risk in the nanomaterials laboratory. Furthermore, the results of the study were also obtained between the research respondents with the level of risk of work accidents in the nanomaterial laboratory with a p-value of 0.00 (<0.05), meaning that there was a significant correlation between the respondent's research experience and the level of work accident risk in the nanomaterial laboratory.]]>
<![CDATA[Experimental Study of Updraft Gasification of Rice Husk and Coal to Produce Syngas ]]>
<![CDATA[Nugroho, Fiqrei Akbar]]>;
<![CDATA[Syarief, Akhmad]]>;
<![CDATA[Mikhael, Allexyus]]>;
<![CDATA[Supit, Geovani Glen]]>
<![CDATA[ International Journal of Mechanical Engineering Technologies and Applications Vol. 2 No. 2 (2021) ]]>
Publisher : <![CDATA[Mechanical Engineering Department, Engineering Faculty, Brawijaya University ]]>
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DOI: 10.21776/MECHTA.2021.002.02.4
<![CDATA[Limited resource of fossil fuel inspires many research activities to search for alternative energy. This work offers alternative solution to address this problem through charcoal gasification. The goal of this research is to find the amount of syngas produced in the gasification is process. The alternative fuel was produced from the mixing rice husk and low quality coal due to their abundant resource in South Kalimantan. The mixture was then gasified at 500 °C. The highest syngas volume at 29.56 L was in the sample of SP 200 gr and BB 0 then followed at 25.7 L for ratio SP 180 gr : BB 20 gr. The lowest produced syngas 19.45 was produced from the sample with ratio SP 100 gr : BB 100 gr. This gasification process also resulted in side product, i.e. tar component which varies from 22.5 mL to 58.75 mL.]]>
<![CDATA[Key Performance Indicators Analysis for Quay Container Crane Performance Assessment (Case Study at Jakarta International Container Terminal) ]]>
<![CDATA[Pekih, Mufti Imam]]>;
<![CDATA[Sembiring, Adelina]]>;
<![CDATA[Santoso, Sugeng]]>
<![CDATA[ International Journal of Mechanical Engineering Technologies and Applications Vol. 2 No. 2 (2021) ]]>
Publisher : <![CDATA[Mechanical Engineering Department, Engineering Faculty, Brawijaya University ]]>
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DOI: 10.21776/MECHTA.2021.002.02.5
<![CDATA[PT Jakarta International Container Terminal (JICT) is the largest container port in Indonesia. Currently, JICT capacity is 2.5 million TEUs (Twenty-foot Equivalent Units) per year, it continues to strive to improve international services and is supported by adequate container loading and unloading equipment. The requirement to establish common standards in different types of container port equipment and identify performance indicators to assess the performance of container handling equipment has increased. Although the Quay Container Crane (QCC) operating system may be different at each container terminal, there are similarities in its main movements, namely: Main Hoist, Trolley, Gantry, and Boom. By knowing the clock metric for each movement, it is possible to determine the Key Performance Indicator (KPI) that has been adopted and assess the performance of the Quay Container Crane (QCC). The results of the study identified that the value of MMBF (Mean Move Between Failures) decreased due to the accumulation of long-lasting heavy load operations, while the number of maintenance activities for machine parts and working hours continued to increase. Key Performance Indicator (KPI) as a management tool can guide QCC inspections and the results can provide useful insights for improving the performance of equipment and container loading and unloading operations in the future.]]>
<![CDATA[Influence of Mixture Composition and Compaction Pressure of Briquette Made from Ironwood (Eusideroxylon Zwageri) Charcoal and Gelam (Melaleuca Cajuputi ) on Combustion Characteristic ]]>
<![CDATA[Syarief, Akhmad]]>;
<![CDATA[Awaly, Nuryasin Qadimil]]>;
<![CDATA[Yusuf, Muhammad]]>;
<![CDATA[Iberahim, Jerry]]>
<![CDATA[ International Journal of Mechanical Engineering Technologies and Applications Vol. 2 No. 2 (2021) ]]>
Publisher : <![CDATA[Mechanical Engineering Department, Engineering Faculty, Brawijaya University ]]>
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DOI: 10.21776/MECHTA.2021.002.02.6
<![CDATA[In recent few years, many works have been dedicated to search for new source of renewable energy. In this study, new source of renewable energy is based in the briquette made from mixture of ironwood (Eusideroxylon zwageri) powder and gelam (Melaleuca leucadendron) wood powder. The mixture was carbonized at temperature of 500 oC ± 10 oC for 120 minutes. The size of the particles used was 50 mesh while the ratio between wood powder adhesives, i.e. starch powder, used in the study was 1:1. The composition variations between ironwood charcoal and gelam were 100% ironwood charcoal powder and 0% gelam, 70%: 30%, 50%: 50%, 30%: 70%, 0% ironwood: 100% gelam. The compaction pressure during briquette production was varied at 100 kg/cm2, 125 kg/cm2 and 150 kg/cm2.  The highest combustion temperature at 205 oC occurred in the specimen with composition of 30% ironwood powder and 70% gelam wood powder with compaction pressure of 100 kg/cm2. The longest burning duration 140 minutes (2 hours 20 minutes) occurred at composition of 50% ironwood powder and 50% gelam wood powder at compaction pressure of 150 kg/cm2. The fastest initial ignition time was 7 minutes and occurred for mixture with composition of 70% ironwood powder and 30% gelam wood powder at compaction pressure of 125 kg/cm2.]]>
<![CDATA[Effect of Alkalization Duration and the Orientation of Fiber on Composites of Polyester Reinforced Fibre of Terap Tree (Artocarpus Elasticus) on Impact and Bending Strength ]]>
<![CDATA[Syarif, Akhmad]]>;
<![CDATA[Sumantri, Dhenny]]>;
<![CDATA[Robittah, Ahmad]]>;
<![CDATA[Prayogi, Syafa'at]]>
<![CDATA[ International Journal of Mechanical Engineering Technologies and Applications Vol. 3 No. 1 (2022) ]]>
Publisher : <![CDATA[Mechanical Engineering Department, Engineering Faculty, Brawijaya University ]]>
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DOI: 10.21776/MECHTA.2022.003.01.2
<![CDATA[Composite application has increased in recent years due to many advantages, e.g. In Kalimantan, there are many types of flora, one of which is the Terap tree (Artocarpus elasticus) which has a strong enough strength and is usually used by the Dayak people as clothing, hats, and rigging. In this research, we examine the laminate composite of tree skin fibers against bending strength and impact price. In making composites using a variety of alkali time, namely 60 minutes, 90 minutes and 120 minutes, the amount of alkali concentration used is 15% of the total volume of alkaline liquid. Then also use variations of fiber orientation 0o-900-00-900, 00-900-900-00, and 900-00-00-900. The impact test results showed that the highest value was obtained in specimens with an immersion time of 90 minutes with 00-900-00-900 orientation of 0.00294 joule / mm2 and the lowest value was found in specimens with immersion time 120 minutes 00-900-00-900 amounting to 0.00164 joules / mm2. While the Bending test obtained the highest value in specimens with 120 minutes of immersion time with 00-900-00-900 fiber orientation of 48.01 mph and the lowest value was obtained in specimens with 60 minutes immersion time at 900-00-00-900 for 16.62 MPa.]]>
<![CDATA[The Influence of Leachate Water on Corrosion Rate of Mild Steel Plate ]]>
<![CDATA[Ghofur, Abdul]]>;
<![CDATA[Rachman, Dhonie Adetya]]>;
<![CDATA[Lutfi, Muhammad Mochtar]]>;
<![CDATA[Rahman, Fathur]]>
<![CDATA[ International Journal of Mechanical Engineering Technologies and Applications Vol. 2 No. 2 (2021) ]]>
Publisher : <![CDATA[Mechanical Engineering Department, Engineering Faculty, Brawijaya University ]]>
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DOI: 10.21776/MECHTA.2021.002.02.7
<![CDATA[Leachate water from final waste landfill (Tempat Pembuangan Akhir, TPA) contains harmful substances for the environment and living organisms. Furthermore, the leachate water can deteriorate equipment buried near TPA, e.g. buried water pipe. This work investigated the corrosion rate of mild steel SPCC SD after immersion in leachate water of TPA Gunung Kupang and Cahaya Kencana located in South Kalimantan. The steel plate immersion into leachate water was worked out in 3 different cases. The first case was 2 weeks immersion in leachate water followed by 1 week contact with ambient air. In the second case, steel plate was immersed in leachate water for 1 week and then 2 weeks in direct contact with ambient air. The last one was steel plate immersion in leachate water for 3 weeks without any direct contact with ambient air. The investigation shows that longer contact duration between wet steel surface, after immersion in leachate water, with ambient air increases the corrosion rate. The investigation shows also that the corrosion rate due to leachate water from Gunung Kupang landfill is higher than that of Cahaya Kencana landfill. Corrosion rate for TPA Gunung Kupang case varies from 0.441 to 0.718 mmpy. Meanwhile, corrosion rate for TPA Cahaya Kencana varies from 0.131 to 0.495 mmpy. This is due to lower pH of leachate water from TPA Mount Kupang.]]>
<![CDATA[The Effect of Boiling Time of Wulung Bamboo Fiber (Gigantochloa Atroviolacea) in NaOH Solution on Tensile Strength of Epoxy Matriced Composites ]]>
<![CDATA[Bintarto, Redi]]>;
<![CDATA[Widodo, Teguh Dwi]]>;
<![CDATA[Raharjo, Rudianto]]>;
<![CDATA[Sulistyo, Erwin]]>;
<![CDATA[Tamtomo, Bagas]]>
<![CDATA[ International Journal of Mechanical Engineering Technologies and Applications Vol. 3 No. 1 (2022) ]]>
Publisher : <![CDATA[Mechanical Engineering Department, Engineering Faculty, Brawijaya University ]]>
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DOI: 10.21776/MECHTA.2022.003.01.3
<![CDATA[The purpose of this study was to determine the effect of immersion time of NaOH at a temperature of 60-70 ℃ in wulung bamboo fibers on the tensile strength of the epoxy matrix composites. Wulung bamboo fibers (Gigantichloa Atroviolacea) have the potential to be used as reinforced in composites because they have high strength and are widely grown in Indonesia. In this study, bamboo wulung fiber reinforcement was used without treatment and with variations, soaking time 30 minutes, 60 minutes, and 90 minutes in 6% NaOH solution with a temperature of 60-70 ℃. The composite manufacturing method used was vacuum assisted resin infusion and the standard composite specimen used as a tensile test was ASTM D638-01. The results showed that the longer the immersion time resulted in a rougher topography of the fiber surface which caused the composite tensile strength to increase due to the better mechanical interlocking between the fibers and the epoxy resin matrix. The wettability results on the fibers also show that the wetness between the fibers and the epoxy resin matrix is getting better, which is shown from the droplet contact angle on the resulting fibers. The highest composite tensile strength was obtained at 90 minutes immersion time of 169.765 MPa followed by immersion time of 60 minutes of 123.2 MPa, immersion time of 5 minutes of 81.7 MPa and without treatment of 71.6 MPa. Based on the results of the macro photo shows that the treatment given will reduce the failure of the pull out and debonding defects on the composite fracture.]]>
<![CDATA[Design of Automatic Feeder for Shrimp Farming Based on Internet of Things Technology ]]>
<![CDATA[Arditya, Ilham]]>;
<![CDATA[Setyastuti, Tri Ari]]>;
<![CDATA[Islamudin, Fikri]]>;
<![CDATA[Dinata, Iskandar]]>
<![CDATA[ International Journal of Mechanical Engineering Technologies and Applications Vol. 2 No. 2 (2021) ]]>
Publisher : <![CDATA[Mechanical Engineering Department, Engineering Faculty, Brawijaya University ]]>
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DOI: 10.21776/MECHTA.2021.002.02.8
<![CDATA[In shrimp farming, feeding is an important activity to achieve good shrimp growth. Manual feeding manually using hand is less effective due to unequal food distribution. Thus, an automatic feeder is required to dispense feed at predetermined time. The advantages of automatic feeder are cost-effective, low labour requirement, and can be applicable for large volumes of feed. Design of automatic feeder machine can influence the capacity and time controlling of the feeder. In this research, the automatic feeder was designed using a controlling time system based on Internet of Things (IoT) technology. During plant trial, The automatic feeding was scheduled at 7 am, 11 am, 4 pm, and 8 pm. This machine could throw shrimp food homogeneously up to 10 m far for 2,500 m2 pond area. In shrimp farming, distribution of shrimp food in predetermined time becomes an important rule to achieve good shrimp growth.]]>
<![CDATA[Application of Fiber Made from Bark of Salak (Salacca Zalacca) Tree as Reinforcement in Polymer Matrix Composites ]]>
<![CDATA[Laksono, Andromeda Dwi]]>;
<![CDATA[Tajalla, Gusti Umindya]]>;
<![CDATA[Parusha, Oliever Andrea]]>
<![CDATA[ International Journal of Mechanical Engineering Technologies and Applications Vol. 2 No. 2 (2021) ]]>
Publisher : <![CDATA[Mechanical Engineering Department, Engineering Faculty, Brawijaya University ]]>
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DOI: 10.21776/MECHTA.2021.002.02.9
<![CDATA[Although Indonesia is abundant supply of salak (Salacca zalacca) fruit, bark of salak is not yet advanced utilized. This work therefore chracterized its fiber and process it into polymer matrix composites. The study was conducted using varied chemical treatments. Delignification using NaOH solution with concentration of 1%, 5%, 10% with 3 hours immersion time. Bleaching treatment was using H2O2 media with varied immersion time at 30, 60 and 90 minutes. Tensile tests, impact tests, microscopic image test using scanning electron microscopy (SEM) and chemical composition test using fourier-transform infra-red (FTIR) spectroscopy were carried out in this work. This work showed that optimal delignification treatment can be found when 5% NaOH concentration was used. The corresponding ultimate tensile strength and impact strength were 25.47 MPa and 11.95 kJ/m2, respectively. The optimal bleaching treatment was 90 minutes immersion. The results of SEM image analysis showed that the salak midrib fiber composite without treatment has a lousy interface. Meanwhile, fiber with delignification treatment only has reasonable good interface and fiber with delignation treatment followed by bleaching treatment has excellent interface. FTIR test results showed that the salak midrib fiber composite without treatment had a cellulose component although hemicellulose and lignin levels still dominated. The delignification treatment had succesfully broken the lignin-specific C = O bond but still could not eliminated hemicellulose and lignin bond. In comparison, bleaching treatment reduced intensity of OH intensity, CH and CO which are typical hemicellulose and lignin functional groups. Based on the results of the study, salak midrib fiber with delignification chemical treatment using 5% NaOH for 3 hours followed by bleaching treatment using 2% H2O2 for 90 minutes was the best treatment.]]>
<![CDATA[Analysis on Nylon 6/6 Camshaft Gear Temperature Simulation In A 1.1 Kva Elepaq Generator Using Inventor and ANSYS ]]>
<![CDATA[Sanni, Olalekan Abdulrahim]]>;
<![CDATA[Oke, Sunday Ayoola]]>
<![CDATA[ International Journal of Mechanical Engineering Technologies and Applications Vol. 2 No. 2 (2021) ]]>
Publisher : <![CDATA[Mechanical Engineering Department, Engineering Faculty, Brawijaya University ]]>
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DOI: 10.21776/MECHTA.2021.002.02.10
<![CDATA[Camshaft gear temperature simulations are presently crucial as they offer a distinctive visual account of the temperature profile within the generator, they permit superior manufacturing assessment and the design of heat-resistant camshaft gear with high performance and low cost. However, available information to designers is inadequate as they omit the approximate global maximum temperature, particularly for the nylon 6/6 camshaft gear in a 1.1 kVA elepaq generator. In this article, the idea is to simulate and account for the global minimum and maximum temperature using the Inventor and ANSYS software. The stress-induced on the generator was considered. The results of the simulation revealed an approximate global maximum temperature of the nylon 6/6 camshaft gear as 37°C max with 22°C min. Furthermore, the global minimum at 35°C max with 21°C min was considered. Besides, the structural steel global maximum of 38°C max, 25°C min and global minimum 35°C max, 24°C min. The stress values did not exceed 0.1419 MPa on ANSYS but the ANSYS revealed that the camshaft gear strain was within safe limits. The simulation approach predicts the minimum and maximum temperature of the nylon 6/6 camshaft gear and the stress and strain values. The utility of this attempt is to help designers to implement effective decisions on material choice and design parameters for optimisation, performance and low-cost design.]]>
