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Redaksi Jurnal Rekayasa Mesin Jurusan Teknik Mesin Fakultas Teknik, Universitas Brawijaya Jl. MT. Haryono 167 Malang, Jawa Timur Indonesia 65145
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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.
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Articles 8 Documents
 1 
Search results for , issue "Vol 8, No 3 (2017)" : 8 Documents clear
Karakterisasi Material Polimer PVDF dengan Polarisasi Permukaan Nugraha, Aditya; Ardin, Masri Bin; Rezani, Rivandra
Jurnal Rekayasa Mesin Vol 8, No 3 (2017)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (487.89 KB) | DOI: 10.21776/ub.jrm.2017.008.03.3

Abstract

Polivinylidene fluoride (PVDF) is one type of polymer. PVDF is commonly used as a force, heat and strain sensors due to its piezoelectric properties. However, it needs a special process to create the piezoelectric properties of PDVF. One of the special process to create the piezoelectric properties is surface polarization of PVDF. Two electrodes were placed on the surface of PVDF and a high-voltage DC electricity was used for polarization process. In this study, Piezoresponse Force Microscopy (PFM) and Fourier Transformed Infrared (FTIR) was used to determine the results of the surface polarization. The results showed that PVDF with lateral polarization has a more orderly domain direction and a higher β phase compared to unpolarized PVDF. In addition, the quality decreased with increasing the electrode distance in the lateral polarization.
Pengaruh Daya Microwave terhadap Yield pada Ekstraksi Minyak Atsiri dari Bunga Kamboja (Plumeria Alba) menggunakan Metode Microwave Hydrodistillation Erliyanti, Nove Kartika; Rosyidah, Elsa
Jurnal Rekayasa Mesin Vol 8, No 3 (2017)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (157.975 KB) | DOI: 10.21776/ub.jrm.2017.008.03.8

Abstract

Frangipani oil is one of the most expensive essential oils. Conventional extraction methods has many disadvantages, so the microwave hydrodistillation method is used as an alternative to optimize the quality and quantity of frangipani oil. The purpose of this study was to investigate the effect of microwave power on the yield of frangipani oil. The research stage was carried out by inserting frangipani flower that has been cut into the flask and mixed with different aquadest solvent volumes of 300, 400, 500, and 600 ml. The flask put into the microwave with different powers of 300, 450, and 600 W for three hours. The resulting vapor is collected and separated in a separating funnel. The process is carried out at atmospheric pressure and the operating temperature is 100 °C. Finally, the yield percentage determined from resulting product. The results showed that microwave power had a significant effect on the yield percentage of frangipani oil. The yield percentage increased with increasing the microwave power. The highest yield percentage was generated at 600 Watt, 25 gram flower mass, and 600 ml volume, which was 1,612%.
Perancangan Alat Penghitung Benih Ikan Berbasis Sensor Optik Purbowaskito, Widagdo; Handoyo, R.
Rekayasa Mesin Vol 8, No 3 (2017)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (355.611 KB) | DOI: 10.21776/ub.jrm.2017.008.03.4

Abstract

Freshwater fish is one of important commodities for the people of Indonesia. High level of freshwater fish consumption in Indonesia leads to an enormous amount of freshwater fish embankment business. These freshwater fish embankment business are supported by fries cultivation business. One of the activities on the fries cultivation business is trading activity where the traded fries counting process is important. One of the problems on the counting process is that the counting process is done manually which is tend to be done inaccurately and time consuming. A proposed solution to alleviate this problem is the development of fries counter device by using optical sensor technology. The counter device consists of mechanical and electronics systems. The device is designed as a plastic box with three distribution pipes where on each pipe there is a transparent part installed with the optical sensor. Based on the testing results the optical sensor can be utilized as the counter sensor with accuracy result 91.4%.
Variasi Ukuran terhadap Kekerasan dan Laju Keausan Komposit Epoxy Alumunium-Serbuk Tempurung Kelapa untuk Kampas Rem Taka, Ario Kristian; Kristianta, FX.; Sholahuddin, Imam
Jurnal Rekayasa Mesin Vol 8, No 3 (2017)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (227.447 KB) | DOI: 10.21776/ub.jrm.2017.008.03.5

Abstract

The aim of this research was to investigate the influence of the particle size of coconut shell powder on hardness and wear rate om aluminium epoxy based composite. Experimental method was used in this study by using four configurations of particle size. The configuration includes comersial powder and particle size of 300 µm, 425 µ and 600 µm. The results showed that the highest and smallest hardness value obtained by 300 µm of 63.67 kg/mm2 and 600 µm is 41.67 kg, respectively. However, the highest and smallest wear rate obtained by 600 µm is 8,70 x 10-6 gram/s.mm2 and 300 µm is 1,17 x 10-6 gram/s.mm2, respectively. This phenomena occured due to the coconut shell powder size of 300 µm is well and uniformly spread.
Analisis Kekuatan Bending dan Kekuatan Impact Komposit Epoxy Diperkuat Serat Pelepah Lontar Saduk, Melsiani Rosdiani Fillipin; Niron, Fransisko Piri
Jurnal Rekayasa Mesin Vol 8, No 3 (2017)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1427.183 KB) | DOI: 10.21776/ub.jrm.2017.008.03.1

Abstract

Natural fibers have been considered as reinforcement in composite materials which is environmentally friendly fiber instead of fiberglass. The use of natural fibers in the composite material is currently growing, along with the increasing use of such materials are widespread ranging from household appliances and industrial sector. The aim of this research was to determine the impact strength and bending strength of lontar fiber composite. The production method of this composite is hand lay-up with random fiber orientation (randomly oriented fiber discontinuous). The composites were produced with a variety of fiber volume fraction of 10%, 15%, 20%, 25% and 30 %. The bending strength of lontar fiber composite 140.235 MPa and modulus of elasticity of 4440 Mpa were obtained. The impact strength of lontar fiber composite and fiberglass were 0.439J/mm2 and 0.8333 J / mm2 respectively.
Desain dan Optimasi Injection Mold Sistem Slider pada Produk Stick T15 Ni'am, Lutfi Khoirul Miftakhul; Budiyantoro, Cahyo; Rahman, Muhammad Budi Nur
Jurnal Rekayasa Mesin Vol 8, No 3 (2017)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4606.055 KB) | DOI: 10.21776/ub.jrm.2017.008.03.6

Abstract

The design of injection molding is the initial process to produce a large-scale product of plastic material which heated and injected into the mold. Design of the preform mold using the plastic material polyethylene terephthalate with the construction of the slider, so that the products which was made have undercut and can’t be made in the core section and cavity. The purpose of this design is to design the slider on the product preform. The software which used for this design using CATIA V5R19 and simulation software production using Autodesk Moldflow Insight 2016. The step on designing a unit injection mold in the preform includes several steps. The first step is identify the product, the calculation of the cooling and input the data calculation result to an moldflow. The second step is design construction slider and determine the mold material as well as calculating the construction mold. The third step is pour the results of the design in figure 2D. Based on the analysis results from moldflow obtained cooling optimal.i.e. the type of cooling series type 2, and if can be concluded construction of the mold said to be safe if the stress, the style and the determination  of material which occurs under the stress and style of permit.
Pengaruh One Direction Pre-Tension pada Reinforcement Fibre terhadap Kekuatan Tarik dan Impact Fibre-Powder Reinforcement Hybrid Composite Gumilar, Gilang; Oerbandono, Tjuk; Wardhana, Bayu Satria
Rekayasa Mesin Vol 8, No 3 (2017)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (371.306 KB) | DOI: 10.21776/ub.jrm.2017.008.03.2

Abstract

Nowadays, industrial manufacturing needs environmentally and friendly material and has special properties which are difficult to obtain from the metal material. Composite is one of the alternative materials that can be used to meet those needs. A structural composite material consisting of a combination of two or more elements bonded material at the macroscopic level. This study was conducted to determine the effect of pre-tension one direction on a hybrid composite reinforcement against tensile strength and impact strength. Composite materials prepared by C-Glass fiber types woven rovings, coconut shell powder and vinyl ester resin. manufacturing composite using hand lay-up methods. The variation of the tension given 0N, 50N, 100N, 150N, and 200N. A tensile test based on the reference standard ASTM D 3039 while testing the impact based on ASTM D 6110-04. The results were obtained giving tension to the hybrid composite reinforcement increases tensile strength and impact strength of the material. The lowest tensile strength of the composite obtained in 0N treatment (without treatment) ranged 71,58N / mm², and the greatest tensile strength is obtained in the pre-tension 200N, ranging from 106.05 N / mm2. As for the lowest impact on specimens obtained without treatment ranges 1,34J / mm2 and provision of pre-tension 200N biggest impact strength values obtained, ranging 15,09J / mm2.
Efek Longitudinal Vortex Dihasilkan dari Vortex Generator Jenis Concave Delta dan Rectangular Winglet terhadap Perbaikan Perpindahan Panas: Visualisasi Aliran/Studi Eksperimental Syaiful, Syaiful
Jurnal Rekayasa Mesin Vol 8, No 3 (2017)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (508.953 KB) | DOI: 10.21776/ub.jrm.2017.008.03.7

Abstract

The generation of longitudinal vortex to enhance the rate of heat transfer is a passive method that has been widely considered recently. This consideration is based on improving the energy efficiency and optimum design of a heat exchanger. Therefore, this study is focused on the experimental test and flow visualization of effects of longitudinal vortex generated from concave delta and rectangular winglet vortex generators on the increase of heat transfer rate. This is performed by draining the air inside the channel with variations in velocities ranging from 0.4 m/s - 2 m/s through a rectangular plate mounted with the vortex generators. The attack angle of the flow against the vortex generator is 15°. The flow visualization is performed by firing a laser beam on a cylindrical glass rod at certain locations to capture the longitudinal vortex formed on the cross-section plane. Inlet and outlet air temperatures and wall temperature are measured using the thermocouples. The results show that the longitudinal vortices are formed in the wake region of the vortex generators. By using the concave delta winglet, the heat transfer rate can be increased up to 51% and increased to 85% using the concave rectangular winglet.

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