Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin
Rekayasa Mekanika is scientific journal on mechanical sciences and engineering field, either pure or inter disciplinary works. This journal is a continuation of Rekayasa Mekanik which changed its name since April 2022. This journal publishes 6 articles for each issue, April and October. Starting April 2025, this journal publishes 10 articles. Authors are cordially invited to submit his/her research, review or monograph papers in English or Indonesian.
Articles
85 Documents
<![CDATA[CONNECTING ROD FAILURE ANALYSIS UNDER MAXIMUM LOADING ]]>
<![CDATA[Suryadi, Dedi]]>
<![CDATA[ Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 3 No. 1 (2019): April 2019 ]]>
Publisher : <![CDATA[UNIB Press ]]>
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DOI: 10.33369/rekayasamekanika.v3i1.9932
<![CDATA[Motorcycle is one of the public transportation consisting of several components. One of the main components is connecting rod, that is a connector part between the piston and crankshaft. Connecting rod is often getting damage, such as bent or broken. The damage is as the result of the continuously working connecting rod that caused a fatigue on components. Therefore, strength analysis is needed to be conducted to determine the cause of the damage on the connecting rod. The application of force on the mechanism crank must be considered especially in the analytical calculations and simulations. The object of this research is the connecting rod of motorcycle using AISI 1070 material. The finite elements model is applied on the model by using ANSYS workbench 14.0 software. The boundary conditions are also applied on the big end part is fixed suport, while at the small end is subjected to loads due to the dynamic motion of the system. As the results, maximum stress and safety factor are obtained. The maximum stress is 164.7 MPa and smaller end part with safety factor of 3.01. According to the result, the connecting rod is safe]]>
<![CDATA[FLOW CHARACTERISTIC OF HEAD DIFFERENCE PUMP AS ARRANGED IN SERIES AND PARALLEL ]]>
<![CDATA[Helmizar, Helmizar]]>
<![CDATA[ Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 3 No. 1 (2019): April 2019 ]]>
Publisher : <![CDATA[UNIB Press ]]>
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DOI: 10.33369/rekayasamekanika.v3i1.9933
<![CDATA[Pump is a device used to move fluid. The pump moved the fluid from a lower pressure place to a place with higher pressure. If the head or pump capacity needed cannot be achieved using only one pump, it can use two pumps or even more which can be arranged either in series or in parallel. The research objective for pumps arranged in series and in parallel is to determine the characteristics of the circuit of two pumps each of which has different characteristics. In this study, data retrieval is done by measuring the pressure on suction and discharge using pressure gauge at pumps 1 and 2. Whereas to measure the flow rate of a pump arranged in series and parallel using a flowmeter installed on the discharge side of the circuit. This research was done by varied the valve openings on the pump discharge side 2 namely 2x1800, 4x1800, 6x1800, 8x1800 and full openings. From the results of tested the characteristics of the pump used water fluid on the series arrangement, the highest head value at valve opening 2 x 1800 is 30.99 m at discharge 0 LPM and the lowest head at valve opening 10 x 1800 (full) is 23.99 m at discharge 0 LPM. In parallel circuits, the highest head obtained is 16.99 m with 0 LPM discharge at 8 x 1800 valve openings and lowest head 14.99 at 0 LPM discharge occurs at full valve openings]]>
<![CDATA[PIPING AND BALLAST PUMP SELECTION FOR A TANK CARRIER SHIP ]]>
<![CDATA[Witanto, Yovan]]>
<![CDATA[ Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 3 No. 1 (2019): April 2019 ]]>
Publisher : <![CDATA[UNIB Press ]]>
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DOI: 10.33369/rekayasamekanika.v3i1.9934
<![CDATA[Pump is a device used to move a liquid from a lower place to a higher place by giving energy to the liquid to be moved. Generally the pump is driven by a motor, turbine, engine, or the like.PT Daya Radar Utama Unit 3 Lampung company engaged in ship production or shipbuilding. On ships there is a balancing system or commonly called a ballast system which aims to balance the ship when the load is empty or full. Balancing used is in the form of sea water which is input into the ballast tank. Therefore there is a selection of pumps to adjust to the ballast reservoir used in a ship so that the time needed to fill the tank can be according to the needs. On warships carrying steel tanks, it is known that the volume of the ballast tank is1300m3with a planned time of 5 hours. From the tank volume data that has been known, the capacity of the planned ballast pump can be calculated and the capacity obtained is260m3/h, the pipe diameter prediction value is suitable for use from the value of the ballast pump capacity of 8 "and the total head value is obtained to meet the needs based on the image design of the balaas system which is planned to be valued at 27.43m. From these data, the ballast pump can be selected according to the need for filling the ballast tank for 5 hours by selecting the pump specifications according to the total discharge and head obtained]]>
<![CDATA[SHELL LIFE TIME ANALYSIS FOR INSPECTION PLANNING OF HEAT EXCHANGER OIL REFINERY ]]>
<![CDATA[Suryono, Ahmad Fauzan]]>
<![CDATA[ Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 3 No. 1 (2019): April 2019 ]]>
Publisher : <![CDATA[UNIB Press ]]>
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DOI: 10.33369/rekayasamekanika.v3i1.9935
<![CDATA[Heat exchanger is a device where there is a flow of heat transfer between two or more fluids at different temperatures, where both fluids flow in the system. Fluids with a higher temperature will transfer heat to a lower temperature fluid. The shell and tube type is chosen because it has a good mechanical arrangement with a form that is good enough for pressurized operations. Many factors that affect the life span of a heat exchanger include thickness, the rate of reduction in shell thickness and corrosion rate. In this study, the calculation of the corrosion rate is a variable to get the value of remaining life in order to find out whether the shell is still feasible to use. And also know the limits of the process from the shell for further inspections obtained after performing minimum thickness calculations and MAWP. In this calculation carried out using International Standards namely API 660 and ASME Section VIII Division I with material ASTM A-285 Grd CFrom the results of calculations and analysis it was found that the estimated corrosion that occurred in the shell and tube heat exchanger 6-2A at the oil refinery for 14 years (2001 to 2015) amounted to 0.0857 mm/year and the Remaining Life (RL) which is 156.17 years. From these results it was concluded that the shell was feasible to be used until the year 2171. In addition, the MAWP value was also obtained at 5.414 MPa.]]>
<![CDATA[MAN POWER REDUCTION EFFECT ON RAIL BRIDGE FABRICATION ]]>
<![CDATA[van Hoten, Hendri]]>;
<![CDATA[Nurbaiti, Nurbaiti]]>
<![CDATA[ Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 3 No. 1 (2019): April 2019 ]]>
Publisher : <![CDATA[UNIB Press ]]>
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DOI: 10.33369/rekayasamekanika.v3i1.9936
<![CDATA[The research is to analysis the effect of reducing manpower for production process railroad bridge WTT46.5 type. The purposed manpower reduction is to increased effective production process railroad bridge WTT46.5 type and reduction manpower cost. Reduction of Manpower happened in trial process with the number 15 people and separated in some part. On of the part is in welder that is reduction in one person. Manpower reduction in trial process to improve company finance by Rp. 4.645.620,00 in every project.]]>
<![CDATA[THE HEAT TRANSFER FLOW ANALYSIS OF STANDARD PLATE STELL OF JIS G3106 GRADE SM20B ON PRE-HEATING JOINT WEB PLATE I-GIRDER PROCESS CASE STUDY IN PT. BUKAKA TEKNIK UTAMA, BOGOR REGENCY, WEST JAVA PROVINCE ]]>
<![CDATA[Puspawan, Angky]]>;
<![CDATA[Pangestu, Mirza Aditya]]>;
<![CDATA[Suandi, Agus]]>;
<![CDATA[Alqaf, A. Sofwan Furqon]]>
<![CDATA[ Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 4 No. 1 (2020): April 2020 ]]>
Publisher : <![CDATA[UNIB Press ]]>
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DOI: 10.33369/rekayasamekanika.v4i1.13270
<![CDATA[PT. Bukaka Teknik Utama in working on government projects, namely the construction of the Jakarta-Cikampek elevated toll road, the focus of fabrication of steel plates. The steel plate fabrication process, there is a pre-heating process for two steel plates connected by SAW welding with the Joint Web Plate process. During the pre-heating process, conduction heat transfer takes place from the PWHT ceramic to the steel plate. To complete the calculation of the unstable conduction heat transfer two equations are used, namely the equation q transient conduction and q the capacity of the object. Both equations are substituted to get the value of time needed to heat a steel plate from 40oC to 99oC. After calculation and analysis, it can be concluded that the heating time of JIS G3106 Grade SM520B steel plate is directly proportional to the desired temperature. Where the higher the heating temperature is desired, the longer the heating time required to reach the heating temperature. The calculation results obtained the smallest heating time value is 28.695193 seconds at a temperature of 40oC and the largest heating time value is 790.858579 seconds at a temperature of 99oC.]]>
<![CDATA[EFEKTIVITAS COOLING TOWER FAN 6P - 4051 – GB. DI PT. PUPUK SRIWIDJAJA SEKTOR STG – BB, PALEMBANG, SUMATERA SELATAN ]]>
<![CDATA[Triyansah, Olga]]>;
<![CDATA[Witanto, Yovan]]>
<![CDATA[ Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 4 No. 1 (2020): April 2020 ]]>
Publisher : <![CDATA[UNIB Press ]]>
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DOI: 10.33369/rekayasamekanika.v4i1.13272
<![CDATA[PT. Pupuk Sriwidjaja uses several cooling systems, one of which is the Cooling Tower Fan 6p - 4051 - GB cooling system. The cooling system is used for production machines especially in turbines. This practical work report will discuss the effectiveness of Cooling Tower Fan 6p - 4051-GB, by processing data on the temperature of incoming water, outlet water temperature, wet blub temperature and flow rate of water, then the calculation of actual data is then compared with ideal conditions, thus will be known how the performance of the Cooling Tower Fan 6p - 4051 - GB. From the analysis the ideal effectiveness value is 66.66% while for the actual effectiveness value is 64.5301%, the effectiveness decreases 2.136%. This is due to heat transfer from the system to the environment or vice versa. From the results of the analysis it can be seen in the data that the water temperature comes out at 10:00 always increases compared to the other hours. This is because at 10.00 the sunlight directly leads to the cooling tower water reservoir and on rainy days the effectiveness of the cooling tower will increase]]>
<![CDATA[PENGARUH POST CURING TREATMENT DAN PERENDAMAN AIR LAUT PADA KOMPOSIT HYBRID KEVLAR/KARBON ]]>
<![CDATA[Suryono, Ahmad Fauzan]]>;
<![CDATA[Faizal, Ahmad]]>;
<![CDATA[Hestiawan, Hendri]]>
<![CDATA[ Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 4 No. 1 (2020): April 2020 ]]>
Publisher : <![CDATA[UNIB Press ]]>
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DOI: 10.33369/rekayasamekanika.v4i1.13273
<![CDATA[In composite engineering, there are also known hybrid composite types which allow the presence of two or more reinforcing particles and are usually arranged by a straight type and a random type. In this research, hybrid composites are made from a combination of kevlar fiber and carbon twill fiber using the vacuum assisted resin infusion (VARI) method. This fiber will be made into a composite consisting of ten layers with a composition of six layers of kevlar fiber and 4 layers of carbon twill fibers. Vinylester resin is used as a matrix on the composite. The hybrid composite material was given post curing treatment and soaked by sea water. From the tensile test results obtained an average ultimate tensile strength (UTS) value of 314.38 MPa at post curing temperature of 100 °C, then the results of compressive test of the kevlar/carbon hybrid composite with ASTM D6641 obtained an average compress strength value of 87.76 MPa at 100 °C postcuring and the results of the kevlar + carbon-vinylester composite shear test with ASTM D5379 obtained an average shear strength value of 20.45 MPa at post curing room temperature.]]>
<![CDATA[PEMANFAATAN INTERNET OF THINGS UNTUK MONITORING SUHU DI BPPT–MEPPO ]]>
<![CDATA[Ikhwanusshofa, Muhammad]]>;
<![CDATA[Nuramal, Agus]]>;
<![CDATA[Supardi, Nurul Iman]]>
<![CDATA[ Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 4 No. 1 (2020): April 2020 ]]>
Publisher : <![CDATA[UNIB Press ]]>
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DOI: 10.33369/rekayasamekanika.v4i1.13274
<![CDATA[Proses monitoring suhu merupakan hal yang sangat penting untuk dilakukan khususnya dalam dunia industri. Dengan monitoring suhu, diperoleh data suhu yang dapat digunakan untuk melakukan quality control dan analisa pemecahan masalah ketika terjadi suatu kegagalan. Pada artikel ini akan diambil data suhu dan kelembaban di ruang workshop BPPT-MEPPO dengan menggunakan module DHT11 yang sebagai sensor suhu dan kelembaban. Sinyal yang diterima oleh DHT11 akan diolah oleh Raspberry Pi 3 dan dikirimkan ke ThingSpeak sebagai server penerima data. Setelah data masuk ke ThingSpeak, data pengukuran yang telah dilakukan dapat dilihat menggunakan handphone ataupun komputer yang mempunyai akses internet. Data yang diperoleh selanjutnya ditampilkan dalam bentuk grafik suhu dan kelembaban vs waktu. Tampilan grafik tersebut dapat diakses secara mobile dengan perangkat telefon yang terhubung dengan akses internet.]]>
<![CDATA[ANALISA LEVEL GETARAN COOLING WATER PUMP 1 JENIS SENTRIFUGAL ]]>
<![CDATA[Carnegie, Novrian]]>;
<![CDATA[Suryadi, Dedi]]>;
<![CDATA[Fitrilina, Fitrilina]]>
<![CDATA[ Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 4 No. 1 (2020): April 2020 ]]>
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DOI: 10.33369/rekayasamekanika.v4i1.13275
<![CDATA[PLTA Musi merupakan pembangkit listrik tenaga air dengan tipe Run of River (RoR) yang dimana bekerja dengan cara membelokkan sebagian aliran sungai musi untuk dimanfaatkan sebagai energi primer pembangkit. Pada Cooling Water System PLTA Musi terdapat Cooling Water Pump (CWP) yang berfungsi untuk memompakan air dari draft tube ke bagian peralatan yang membutuhkan sistem pendingin pada saat unit dioperasikan. Dalam pengoperasian pompa dapat terjadi berbagai masalah yang menimbulkan kerusakan, salah satunya disebabkan oleh getaran. Analisa getaran merupakan salah satu faktor pendukung untuk meminimalisir terjadinya getaran berlebih pada pompa. Kegiatan predictive maintenance dalam bentuk conditional monitoring vibration atau pemantauan getaran kondisi aktual dilakukan untuk mengetahui gejala kerusakan pada Cooling Water Pump. Pengukuran dilakukan menggunakan alat ukur VibXpert II berdasarkan standar ISO 18016-3 dengan kondisi operasi putaran poros 1486 RPM, daya 90 kW, dan 4 titik pengukuran. Nilai vibrasi tertinggi terdapat pada posisi DE Pompa dengan arah horizontal sebesar 3,71 mm/s. Nilai vibrasi tersebut sudah berada pada area alarm. Hasil analisa spektrum yang didapat pada penelitian diketahui jenis gangguan yang terjadi berupa indikasi kerusakan Mechanical Looseness Tipe B pada titik pengukuran DE Motor dan Mechanical Looseness Tipe C pada titik pengukuran DE Pompa.]]>
