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All Journal Jurnal Bisnis dan Ekonomi Majalah Ilmiah Teknologi Elektro ENVIAGRO Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains JIKSI (Jurnal Ilmu Komputer dan Sistem Informasi) JURNAL BISNIS & AKUNTANSI UNSURYA Idea : Jurnal Studi Jepang Jurnal Projemen UNIPA Majalah Ilmiah Teknologi Elektro
Yohanes Yohanes
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Arts Humanities Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Mathematics Social Sciences Other

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Journal : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Identifikasi Penyebab Kerusakan Valve Pada Mud Pump Type Triplex Pump Menggunakan Metode Fault Tree Analysis Di PT. X Ambri Ambri; Yohanes Yohanes; Yuhelson Yuhelson
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Failure that occurs in mud pump one of which caused by the mud pump valve while the valve failure caused to three (3) components namely the valve complete, valve seat and valve spring. Such failure would cause mud pump unit can not be operated so as to interfere with the smooth operation of drilling. The research was focused on identifying the critical components of the valve and evaluate the cause of the valve failure with fault tree analysis method (FTA). Data that obtained from the company processed using calculations pareto chart and FTA method. Critical component is a valve 3 i.e valve complete. Valve failure caused corrosion, wear and failure rubber valve.Keywords: failure, valve, FTA
Kaji Pembuatan Kanvas Rem Sepeda Motor Bahan Komposit Dengan Filler Palm Slag Frandi Barasa; Muftil Badri; Yohanes Yohanes
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Brake  pads have a very important role to become a major factor in driving safety.  Brake quality depends on the constituent materials. Palm slag is one that has potential as a filler material for composite brake. Manufacture of brake pads in this study using the palm slag as a filler, phenolic resin as a binder, steel powder as reinforcing, graphite as a lubricant, alumina as an abrasive. In the manufacture of brake pads remains composition of materials used to variation the compacting and sintering temperature. This study will examine the wear rate and hardness in the brake pads against the brake commercial reference. Brake pads are made with palm slag initial compacting varied  is 190 Bar and 380 bar and then proceed with the final compacting of 450 bar ± 2 minutes. Brake pads that have been heated to a temperature of 1500C using the heater. Brake  pads  that have been  sintered variations to 1500C and 1700C. Brake pads that have sintered be tested for wear and hardness. Brinell hardness testing to get the highest hardness in the brake B is 15.35 BHN (kgf/mm2) commercial brake approaching violence. In dry conditions the wear testing found the smallest wear is approaching commercial brake brake B is equal to 4777 x 10-6 g/mm2.seconds with a  braking  time of 15.33 seconds and shortest braking distance is 63 meters. Keywords: Brake pads, palm slag, composite, sintering, compaction
Pengembangan Sistem Sliding Adaptive Vertical Pada Proses Pengelasan Smaw Posisi 1G/1F Windodo Suwanda; Yohanes Yohanes
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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This study aims to develop a dynamometer to develop a sliding adaptive vertical engine on SMAW welding with 1G / 1F position. Development of sliding adaptive vertical machine includes design, manufacture, testing of sliding adaptive vertical machine, and testing of welding results with tensile test and penetrant test. The parameters used in this study were using V and fillets, 80 - 90 volts, rotary speed of 44 - 60 rpm stepper motor and 60˚ - 65 sudut electrode angle. Specimen A angle 60˚ - 65˚ current 90 rounds 57 rpm has a tensile strength of 349.91 MPa, whereas specimen B with angle 60˚ - 65˚, current 100 and round 60 rpm has a tensile strength of 304.52 MPa. For the test results using the penetrant showed the specimen C is better than the specimen D.Keywords :Welding, Tensile Strengh, Sliding Adaptive Vertical, SMAW.
Kaji Eksperimental Pengaruh Temperatur Campuran Bahan Bakar Biosolar B20 Dan Crude Palm Oil (CPO) Terhadap Unjuk Kerja Mesin Diesel Halal Putra Purba; Romy Romy; Yohanes Yohanes
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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The purpose of this research was testing the performance of diesel engines using a mixture of B20 biodieselfuel which commercialized in Indonesia and crude palm oil with a ratio of 95: 5, 90:10 and 85:15 respectively anda pre-heating process for mixtures is carried out. Fuel temperature was varied with 60℃, 75℃ and 90℃ before injection into the combustion chamber and compares the test data with pure B20 biosolar fuel. The performance of a diesel engine showed that by using a fuel mixture there was no significant change in the amount of effective power,torque and BMEP at constant rotation. Specific fuel consumption using a mixture of fuel without preheating process has decreased compared to using pure B20 biodiesel diesel fuel while efficiency increases. SFC value of fuel mixture with preheating process was smaller than the mixture of fuel without preheating but the thermal efficiencyincreased. The ideal temperature of the fuel mixture is 75oC for each mixed variation.Keywords: Diesel engines, biodiesel, performance, pre-heating, crude palm oil
Kaji Eksperimental Variasi Arus Dan Polaritas Pengelasan Smaw Menggunakan Sistem Sliding Adaptive Two Axis Tazkiyah Ahcmad; Yohanes Yohanes
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Each welding process has its own advantages depending on the placement of the implementation. One of the welding techniques is SMAW (Shielded Metal Arc Welding), which has its own advantages, including largecurrents such as heat source that can be varied, easy to use in different welding positions and penetration and the melting height of the electrode can be adjusted. In the SMAW welding process, the variable that determines the quality of the welding results is the choice of the correct added material, the selection of the current used inthe machine must be adjusted such that the added material (the electrode) is perfect and the welding speed (angle) of the welding itself. The selection of these variables depends on the skill (skill) of the operator who implements them, so that the determination of these variables often changes. In contrast to the welding process that is performed using the SMAW welding machine with a sliding adjustable system with two axes to replace the welder, so that the speed and position parameters of welds can be obtained constantly (fixed).The varied parameters are current and polarity using DC currents (unidirectional) with currents of 90A, 100A and120A.The material used in this study uses mild steel, the seam used is V with an angle of 60o and electrodes with the AWS E-6013 standard. The number of samples tested was 18 samples, 9 of which for straight polarityand 9 samples for reverse polarity. The microstructure of the welding is determined by many factors, including heat input, current, welding speed and cooling speed. In this study, the HAZ area had a grain structure that was larger than base metal and weld metal.Keywords : Currents, Polarity, SMAW Welding, Sliding Adaptive Two Axis
Perancangan Mesin Grinder-Rollpress Untuk Pengolahan Pasta Ubi Kayu Berbasiskan Metode Quality Function Deployment (QFD) Derik Oktarian; Yohanes Yohanes; Satriadi Satriadi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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The processing of cassava paste is generally done manually, ie by way of cassava that has been boiled and then ground using traditional tool are pestle and mortar to be pasta, pasta process cassava thinned using manual tools to the way in the play with their hands. After the thin manioc paste is then printed, for dried pasta plate drying process using hot sun. Roolpress-grinder machine design is done using quality function deployment method that aims to obtain design parameters in accordance with the wishes of the community. From the results of questionnaires parameter in this design are: cassava processing machines belonging, prices are relatively cheap, easily obtainable spart part, electric motor propulsion engine wear, easy to use process. Of all these parameters based on the results of the test using SPSS17.0 softwere significant value is the selection of the highest mover, with a value corrected item-total correlation was 0.610. In designing the grinder machine-rollpress rollpress used this kind made of metal for food or beverage processing equipment. The dimensions of the machine grinder-roolpress Indonesia Anthropometric Data obtained using the 5th percentile. These dimensions include hip height (height rollpress desk onto the floor) is 98.8 cm long, fore arm span (distance operator when performing a milling process) is 77.6 cm long and ranges of hands to the side (distance operator to reach the second workbench) that is 176.1 cm.Keywords: Cassava, Cassava Processing Machinery Pasta, methods of quality function deployment, anthropometry Indonesian, and questionnaires.
Pengembangan Mesin Pengupas Sabut Kelapa Menggunakan Metode Quality Function Deployment (QFD) Untuk Area Indragiri Hilir Helmi Candra; Yohanes Yohanes; Satriardi Satriardi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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In this study the Quality Function Deployment (QFD) develoved to know satisfication of costumer by questionnaire. The objective of this study is to find materials and components coconut dehusking machine accordance with the wishes of society. From the results of the questionnaire, the desired parameters is spare part available on market and cheapest product. Selection of materials and components coconut de-husking is: Selection of cuting knife cone shaped with the number of blades 34 pieces. Selection of conductor knife plat shaped with a number of blades 18 pieces. Selection of an electric motor with a power of 1 HP and 1400 rpm rotation. Selection of sprocket-chain the selected is the number of chain 40 with a pitch of 12.70 mm. The shaft material used is AISI 1045 with diameter of 25.4 mm. Material steel plate the selected is mild steel with a thickness of 2 mm. Steel materials profi L the selected is mild steel with dimension 50x50 mm. Selection of materials and components coconut de husking selected based on the wishes and needs of society Indragiri Hilir.Keyword : QFD, customer need, Materials, Components
Analisis Sifat Mekanik Komposit Serat Sabut Kelapa Sebagai Material Alternatif Pengganti Kayu Untuk Pembuatan Kapal Tradisional Aguswandi Aguswandi; Muftil Badri; Yohanes Yohanes
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Recently, it has been difficult to get the wood as a material to construct the traditional ships. Alternatively, the wood can be substituted by composite materials such as the composite of coco fiber. The coco fiber composites have potential to construct a fishing boat. In this research produced the composite plates and investigation of their value of tensile strength and flexural strength. The composite composition was used 70% polyester and 30% coco fiber. Production of the composite plates used Vacuum Assisted Resin Infusion (VARI) method by variation of the direction of fibers (random, continous and woven). Based on the research result that was produced the composite plates sizes of 400 x 400 x 8 mm and the value of tensile strengths of composite coco fiber for random fiber direction of 12.8572 N/mm2, continuous fiber direction of 15.4436 N/mm2 and woven direction of 12.1797 N/mm2. The value of flexural strengths for random fiber direction was 97.3220 N/mm2, continuous fiber direction of 96.1347 N/mm2 and woven fiber direction of 80.3922 N/mm2. In conclusion, the value of the highest tensile strength and the highest flexural strength were a continuous fiber direction and a random fiber direction, respectively.Keywords: Composites, Coco Fiber, VARI.
Simulasi Distribusi Termal Las Gesek Rotari Pada Penyambungan Mild Steel Berbasis Abaqus Andika Saputra; Yohanes Yohanes; Ridwan Abdurrahman
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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The friction welding process occurs as a result of the direct conversion of mechanical energy in the form of friction into thermal energy. Thermal in the region near the peak joint has a significant effect on the formation of flash, the hot zone and the strength of the rotary friction welded joint. In this study, observations were made on the validation of the thermal distribution with the welding time reaching flash in experimental testing using a thermocouple sensor measuring instrument and the simulation using ABAQUS software. The test results will be carried out with a tensile test to see the maximum tensile strength of the variation of the chamfer angle 0 °, 15 °, 30 °, 45 °. The conclusions obtained are: (1) The form of thermal distribution from experimental and simulation testing is considered to be in accordance with the percentage error of the maximum thermal value of 37.55%. This is influenced by the slow thermal propagation on the friction surface. (2) Requirement of thermal distribution time in simulation and experimental testing, the shortest time is 59 seconds and 71 seconds at 0 ° chamfer angle and the longest time at 45 ° chamfer angle with 600 seconds and 494 seconds for simulation and experimental testing. This is influenced by the friction surface area and the small heat flux value. (3) The maximum tensile test results were obtained at a 45 ° chamfer angle of 505.53 MPa. Keywords: Rotary Friction Welding, Thermal Distribution, Abaqus
Pengaruh Sudut Chamfer Terhadap Timing Melt Point Pada Penyambungan Material Mild Steel Menggunakan Las Gesek Rotari Muhammad Ryan Detra; Yohanes Yohanes; Ridwan Abdurrahman
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 1 Januari s/d Juni 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Rotary friction welding is a type of friction welding which is a type of solid state welding where the welding process is carried out in a solid phase. The friction welding process occurs as a result of the direct conversion of mechanical energy in the form of friction into thermal energy. This research discusses how the effect of the chamfer angle on the timing melt point and the maximum tensile strength in joining mild steel material with the rotary friction welding method, namely by varying the chamfer angle at 0°, 15°, 30°, 45°, 60°. This research uses analytical and experimental methods to analyze the effect of the chamfer angle on the timing melt point. The results of the analysis show that the greater the chamfer angle, then, longer the timing melt point. The lowest average maximum tensile strength value of the joint results was obtained at the variation of the chamfer angle of 0° is 421.17 Mpa and the highest average maximum tensile strength value of the joint results was obtained at the variation of the chamfer angle 45° is 505.53 Mpa. Keywords: Rotary Friction Welding, Chamfer, Timing Melt Point
Co-Authors Achmad Noerkhaerin Putra Aguswandi Aguswandi Alfadeny Anjer Farino Ambri Ambri Anak Agung Gede Sugianthara Andika Saputra Andreas Prasetyo Angga Pranata Angga Septiawan Anita Susilawati Arief Rachman Widyanto Aryo Sasmita Budi Rukhyana Darius Andana Haris Derik Oktarian Devid Vio Sandri Didi Syamsunarto Djoko Widodo Evon Yulianto Fajar Pratama Putra Frandi Barasa Gede Sukadarmika Halal Putra Purba Hambra Hidayatullah Handri Gustiar Helen Susanti Helmi Candra Hendinto Simanihuruk Hendro Sulistiono Ichsan Rahmadani Syawal Imanuel Wellem Irvan Gunawan Jeanny Pragantha Jery Indra Putra Harianja Jon Prisno Riduan Kartika Andi Kentris Indarti Linawati Linawati Muftil Badri Muhammad Nafis Muhammad Ryan Detra Mustafa Akbar Panji Adino Pepi Setya Bakti Pindo Evans Manuel Damanik Radinal Fernandes Ridwan Abdurrahman Romy Romy Roni Wandra Rudiansyah Rudiansyah Satriadi Satriadi Satriardi Satriardi Sistro Maldini Sihombing Tazkiyah Ahcmad Teddi Febriardi Mulia Tri Lestari Uberkis Uberkis Wenny Wenny Windodo Suwanda Yuhelson Yuhelson Zainal Abdi