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
 22   23   24   25   26 
Analisis Pengaruh Temperatur, Waktu, dan Kuat Arus Proses Elektroplating terhadap Kekuatan Tarik, Kekuatan Tekuk dan Kekerasan pada Baja Karbon Rendah Rasyad, Abdul; Budiarto, Budiarto
Jurnal Rekayasa Mesin Vol 9, No 3 (2018)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (679.054 KB) | DOI: 10.21776/ub.jrm.2018.009.03.4

Abstract

The researcher  has analyzed the effect of temperature, time, and electrical current of electroplating process  on tensile strength, bending strength and hardness of low carbon steel. The aim of this research is to know the effect of temperature, time, and electrical current as the parameters of electroplating process on tensile strength, bending strength and hardness of low carbon steel plate material treated using nickel and chrome coating materials. Coating process was operated with variations in temperature of 50 ° C, 55 ° C, 60 ° C; coating time of 5 minutes, 10 minutes, 15 minutes; and electrical currents of 4 A, 5 A, 6 A. Tensile strength and buckling tests were conducted using a versatile test machine (Universal Testing Machine) and hardness test with Vickers method. The tensile strength test results show that the higher temperature, time and electrical current during the coating process, give the greater of tensile strength value (from 307 N / m2 to 376 N /m2), as well as buckling strength testing.The smaller of buckling strength value from 11.5 kg / m2 to 7.5 kg / mm2. Hardness test results indicate a significant increase in the value of hardness in the temperature variation, time, and the electrical current coating, where the hardness value is from 89.3 HV to 100 HV.
Pengaruh Penambahan Nanokatalis MnFe2O4 Terhadap Proses Pirolisis Sampah Plastik HDPE Wati, Rita Fajar; Wardana, ING; Winarto, Winarto; Sukarni, Sukarni; Puspitasari, Poppy
Jurnal Rekayasa Mesin Vol 9, No 3 (2018)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (177.71 KB) | DOI: 10.21776/ub.jrm.2018.009.03.9

Abstract

The effects of MnFe2O4 nanocatalyst addition toward HDPE plastic waste pyrolysis have been investigated by performing experiments on METTLER TOLEDE TGA DSC1 Simultaneous Thermal Analyzer at heating rates of 10oC/min by nitrogen and temperatures range from room temperature to 1000oC. The results of pyrolysis showed that the main polymer components of HDPE plastic waste, both, with and without MnFe2O4 nanocatalyst addition degraded in one stage. The MnFe2O4 nanocatalyst addition increases the maximum mass loss rate of HDPE plastic waste pyrolysis, however, it increase the degradation of the initial temperature.
Identifikasi Komposisi Kimia Tar Kayu Mahoni untuk Biofuel pada Berbagai Temperatur Pirolisis Wijayanti, Widya
Jurnal Rekayasa Mesin Vol 9, No 3 (2018)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (540.097 KB) | DOI: 10.21776/ub.jrm.2018.009.03.5

Abstract

This study indentified the tar yield of pyrolysis of mahogany wood. The produced tar would be analyzed using GC-MS (Gas Chromatograph-Mass Spectrometry) to understand their chemical properties affected by temperature pyrolysis. It would be identified if the elements are flammable matters or not. It is due to the fact that the yields of pyrolysis desire the flammable matters as much as possible as a biofuel. The experiment was conducted at a fixed bed reactor. The needle particle of mahogany wood was used as the pyrolysis feedstock having weight of 200 gram, sizing of mesh 20 hm, and containing 2% moisture content. The variations of pyrolysis temperature influencing the mahogany wood decompositions are 250°C, 350°C, 450°C, 500°C , 600°C, 700°C and 800°C. The pyrolysis was carried out during 3 hours almost without Oxygen. The result of tar yields show that a getting higher of the pyrolysis temperature caused the volume and mass of tar formed by condensation in cold trap would increase up to 500°C and then decrease. The increasing of tar yields would also increase some acetic acid compounds and reach a peak at 350°C in which the acetic acid compound is a flammable substance. From the GC-MS results, it was also presented that at any pyrolysis temperatures, the amount of the flammable tar compounds were higher than the unflammable one. It can be interpreted that the tar yield is very potential as liquid fuel (bio-oil) because the main elements of tar is acetic acid having flash point (flash point) equal to 39°C.
The Effect of Inner Fan Blade Angle to The Ventilation Rate of The Turbine Ventilator Setiawan, Priyo Agus; Yuwono, Triyogi
Jurnal Rekayasa Mesin Vol 9, No 3 (2018)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (411.998 KB) | DOI: 10.21776/ub.jrm.2018.009.03.10

Abstract

Geographical location of Indonesia country has relative wind speed lower than the countries of turbine user e.g. Finland, United States of America, and other countries. Turbine ventilator can be used as ventilation within wind energy driver. The turbine ventilator generates drag force and causes rotated turbine ventilator. This rotation generates a negative pressure inside turbine ventilator and inhaled air. The previous study revealed that the performance of turbine ventilator signifies at low wind speed. Indonesia has low wind speed, thus it should be relevant to assemble the additional inner fan in turbine ventilator. The research method was applied by conducting the experiment to test the effectiveness of turbine ventilator placed above plenum 1 m x 1 m x 2.3 m. NACA 0015 was used for blade inner fan with a variety of inner fan blade angles 15o, 30o, 45o and 60o and varied wind speed to turbine ventilator 1.5, 3, 4.5 and 6 m/s. The turbine ventilator used in this research was about 18 inches in size to measure flow rate over the plenum. Inner fan rotated at 500 rpm. The results of the experiment reveal that rotating turbine ventilator increased the flow rate at an inner fan blade angle of 45 degrees and maximum ventilation rate was at inner fan blade of 45 degree angle.
Optimasi Parameter Proses Bubut Material ST 60 dengan Pendinginan Ramah Lingkungan Menggunakan Metode Taguchi-Grey Pamuji, Dian Ridlo; Lusi, Nuraini
Jurnal Rekayasa Mesin Vol 10, No 3 (2019)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2019.010.03.5

Abstract

Every production process always needs to produce high quality with high productivity. However, in machining processes, qualities such as surface roughness and productivity such as material removal rates have different characteristics. Surface roughness has the quality characteristics smaller the better, while the material removal rate has larger the better. Therefore, determining the combination of lathe parameters is very important to get optimal results. A study has been carried out to determine the combination of lathe process on ST 60 material with an environmentally friendly cooling method to minimize surface roughness response and maximize material processing rates simultaneously. The coolant (cold soluble oil and air pressure), spindle rotation (550 rpm, 700 rpm and 1200 rpm), feed motion (0.053 mm / rev., 0.103 mm / rev and 0.161 mm / rev) and depth of cut (0.125 mm, 0.25 mm and 0.5 mm) were used as process parameters. The tool used in this study is a CNMG insert tool with a 0.4 mm corner radius. The experimental design was determined using the Taguchi method in the form of orthogonal matrix L18 (21x33). The optimization method used is the grey relational analysis. The results showed that an optimal surface roughness response and material removal rate obtained by setting the coolant process at level 1 of cold soluble oil, spindle rotation was set at level 3 at 1200 rpm, feeding motion was set at level 3 of 0.161 mm / rev. And the depth of cut is set at level 3 of 0.5 mm.
Pengaruh Derajat Pengapian terhadap Kinerja Motor Bakar 6 Langkah Berbahan Bakar Etanol Razi, Misru; Siswanto, Eko; Wijayanti, Widya
Jurnal Rekayasa Mesin Vol 10, No 3 (2019)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2019.010.03.10

Abstract

The six-stroke spark ignition engine has the potential to be developed as a new alternative to future motor fuel technology. The development of motor vehicles will be directly proportional to the use of rising fossil fuels. It is, therefore, necessary to have renewable alternative fuel, in which one of them is using ethanol fuel. Characteristics of the ethanol fuel are different from fossil fuels so the ignition timing is needed to be modified. The purpose of this study was to determine the effect of the ignition degree on the performance of a 6-stroke spark-ignition engine fuel using ethanol. This research is worked out directly by experimental and testing on the intended object. The test was carried out on an ethanol-fueled 6-step spark ignition engine with variations in the ignition angle at 240,260 and 280. Each variation was tested for a rotation interval of 600 rpm from 2400 rpm to 7200 rpm. The results show that ignition degree greatly affects performance. The ignition angle of 280 produced better torque, effective power, effective specific fuel consumption and effective thermal efficiency than those of the ignition degrees at 240 and 260 (standard angle ). This is due to the use of ethanol fuel which has a slower combustion speed. Based on this fact, it is necessary to advance the ignition angle so that the explosive power of the air-fuel mixture is increasing. Low fuel consumption and better effective thermal efficiency were observed for 280 ignition degrees compared to 240 and 260 ignition degrees.
Pengaruh Komposisi 2.9% dan 3.8% Si terhadap Kekuatan Lelah Besi Cor Kelabu Ekaputra, I Made Wicaksana; Litaay, Arnold A. I.; Setyahandana, Budi
Jurnal Rekayasa Mesin Vol 10, No 3 (2019)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2019.010.03.3

Abstract

The addition of Silicon (Si) on the gray cast iron can initiate graphite dispersion where the graphite becomes smaller and more evenly distributed. This study investigated the effect of Si concentration of 2.9% and 3.8%  on the fatigue strength of the gray cast iron. The Si was added by the casting process with the open ladle method. The specimens were manufactured by following the ASTM E-466. Several tests such as tensile test, Brinell hardness test, and microstructure observation were conducted prior to the fatigue testing. The results showed that the Si concentration of 3.8% tended to increase the tensile strength up to 1.3%, the hardness up to 7.6%, and fatigue limit up to 10%. Moreover, the fatigue fractured specimen of 3.8% Si showed the combination of type A and type B graphite where graphite is smaller and more evenly distributed. In addition by applying the logistic equation, the fatigue strength can be predicted well.
Pengaruh Parameter Proses Incremental Backward Hole-Flanging terhadap Ketebalan Kerah pada Alumunium 1050A Fakhruddin, Muhammad; Choiron, Moch. Agus; Purnowidodo, Anindito
Rekayasa Mesin Vol 10, No 1 (2019)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2019.010.01.4

Abstract

Conventional hole-flanging process in a small batch is sometimes costly or almost impossible due to the variety of the product profile. Recent studies showed that modern manufacturing was developed to overcome the limitation of the conventional hole-flanging process. Incremental backward hole-flanging (IBHF) was one of the strategies that developed to overcome this particular limitation. The main objective of this research was to investigate the influence of IBHF process parameters toward collar thickness of the product. It enables to measure the impact and behavior of each process parameters, i.e., forming speed, axial and radial forming step size toward the particular response parameter. The result showed that axial and radial forming step size was the main influence and the forming speed has a slight effect towards collar thickness. The behavior of each parameter was increased forming speed and radial forming step size would decrease collar thickness, whereas increased axial forming step size would increase collar thickness.
Pengaruh Waktu Pemanasan (Anil) terhadap Ketahanan Korosi pada Gelas Metalik Berbasis Zirkonium Anggriawan, Ongki Budi; Choiron, Moch. Agus; Lin, Jing Chie
Jurnal Rekayasa Mesin Vol 5, No 3 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The effects of annealing time on the corrosion resistance of a Zr-based bulk metallic glass (BMGs) were studied. The Zr 48 Cu 36 Al 8 Ag BMGs annealed at the temperatures of 471 oC for 0, 23 and 27 min respectively. The partially and fully crystallized was identified by differential thermal analysis (DSC) and by X-ray diffraction (XRD). The corrosion resistances of those BMGs was identified by open circuit potential (OCP), Tafel plot (TP), dan cyclic anodic potentiodynamic polarization (CAPD). The results show that the as-cast of Zr 8 48 Cu 36 Al BMGs (0 min, full amorphous) has higher corrosion resistance than that of the annealing specimen for 23 and 27 min, while the fully crystallized specimen (27 min) has worst corrosion resistance when compared to the other samples in 0.1 M NaCl solution. The improvement of the corrosion resistance for as-cast (0 min) is better than annealed specimen (23 and 27 min), because the as-cast does not have defects like grain boundary (full amorphous). When the annealing time is longer (27 min), the crystallites grow up (more boundary regions), therefore increasing the susceptibility to the localized corrosion.Keywords: Metallic glass, Zr-Cu-Al-Ag, corrosion, NaCl
Identifikasi Efek Heating Rate terhadap Laju Kinetika Reaksi Pirolisis Kayu Mahoni dengan Thermal Analysis dan Termogravimetry Wijayanti, Widya
Rekayasa Mesin Vol 10, No 1 (2019)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2019.010.01.9

Abstract

The study was conducted to investigate the biomass pyrolysis using mahogany wood as the feedstock. Chemically, mahogany wood contained complex biomass compounds, consisting of cellulose, hemicellulose, and lignin. Each biomass compound had its degradation at a certain temperature. Therefore, their compounds will be pyrolyzed at some different temperatures to understand the certain one. In the experiment, the biomass was hydrolyzed based on the temperature differences from room temperature to a temperature around 1000ºC (1273 K). We identified pyrolysis kinetic rate and measured some appropriate pyrolysis temperatures to accomplish the pyrolysis process. Afterward, the investigation of its thermal degradation used Thermal Analysis and Thermogravimetric (TGA) analysis. It would be obtained the estimation of energy needed to obtain a mathematical equation determined by the dependencies of the pyrolysis temperature by using LINSEIS STA Platinum Series. The mathematical equation was gained by using the temperature difference profiles (differential thermal analysis-DTA) and the biomass weight loss (difference thermogravimetry-DTG) by means of TGA. It was measured under the inert condition without Oxygen at the heating rate of 400°C/h and 800°C/h. By using order-1 differential equations, the activation energy, and pre-exponential factors also were determined in the mathematical equation of the kinetic reaction rate equation as k1 = 7.9033  for a heating rate of 400°C/h and k2 = 9.7745  for heating rate 800°C/h.

Page 24 of 97 | Total Record : 965

 22   23   24   25   26 

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