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Jurnal POLIMESIN
Jurnal POLIMESIN is an peer-reviewed journal that publishes original and high-quality research papers in all areas of mechanical engineering. The editorial team aims to publish high quality and highly applied research and innovation that has the potential to be widely disseminated, taking into consideration the potential mechanical engineering that it could generate. Jurnal Polimesin is publish twice a year in February and August.
Articles
39
Articles
PERANCANGAN MESIN PERAJANG BAWANG SERBAGUNA BERPENGGERAK MOTOR LISTRIK DENGAN KAPASITAS 55 KG/JAM

Effendi, Riki, Khumaidi, Muhammad

Jurnal POLIMESIN Vol 16, No 2 (2018): Polimesin
Publisher : Politeknik Negeri Lhokseumawe

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Abstract

Abstract This study aims to create a versatile multipurpose machine design to support increasing production of Usaha Masyarakat Kecil Menengah (UMKM), especially in the business of onion slices that are ready to be fried. The design of this machine has several concepts with steps such as: requirement, problem analysis and specification, design of machine concept, technical analysis, modeling up to work drawing, tool making, assembling and testing. This machine uses electric motors with low power and the price is relatively cheap, so this machine is affordable for the community of UMKM. After doing research on slicing machine of onion by using onion slicer got maximum capacity of 55 kg per hour with 400 rpm slicing knife rotation and 1 mm slice thickness. Keywords: Designing, Chopping Machine, Red Onion, Slicer

PENGARUH PEMESINAN LAJU TINGGI KEADAAN KERING TERHADAP PERTUMBUHAN AUS SISI (VB) PAHAT KARBIDA BERLAPIS (TiAlN/TiN) PADA PEMBUBUTAN PADUAN ALUMINIUM 6061

Sunarto, Sunarto, Mawarni, Sri

Jurnal POLIMESIN Vol 16, No 2 (2018): Polimesin
Publisher : Politeknik Negeri Lhokseumawe

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Abstract

AbstrakPemesinan laju tinggi yang diindikasikan dengan kecepatan potong tinggi pada proses pembubutan keadaan kering menjadi bahasan utama pada penelitian ini. Kecepatan potong (Vc) merupakan salah satu penyebab meningkatnya temperatur pemotongan dan akan mempengaruhi daya tahan alat potong. Akibat temperatur pemotongan yang tinggi pahat akan mengalami kerusakan salah satunya berupa Aus Sisi (VB). VB akan tumbuh secara terus menerus seiring dengan waktu pemotongan. Tujuan penelitian ini adalah untuk mengetahui pengaruh pemesinan laju tinggi terhadap laju pertumbuhan VB selama proses pembubutan paduan Aluminium 6061. Metode yang digunakan dalam penelitian ini adalah dengan menggunakan pahat karbida (Wc+Co) yang dilapisi dengan bahan pelapis Titanium Aluminium Nitrida dan Titanium Nitrida (TiAlN/TiN) menggunakan mesin bubut CNC serta membagi tiga kondisi pemotongan yaitu pada kecepatan potong 800 m/menit, 1000 m/menit dan 1200 m/menit. Hasil yang dicapai dari kondisi pemotongan tersebut adalah pada kecepatan potong 1200 m/menit menghasilkan ukuran VB yang lebih besar jika dibandingkan dengan kecepaatan potong 800 m/menit dan 1000 m/menit dengan waktu pemotongan masing-masing selama enam menit.Kata Kunci: Kecepatan Potong (Vc), Aus Sisi (VB), Alat PotongAbstractHigh speed machining which is indicated by high cutting speed in the dry lathe process becomes the main discussion in this study. The cutting speed (Vc) is one of the causes of increasing the cutting temperature and will affect the durability of the cutting tool. Due to high cutting temperature the cutting tool will suffer damage one of them is Flank Wear (VB). VB will grow continuously along with the cutting time. The purpose of this research is to know the effect of high speed machining to growth rate of VB during the process of Aluminum 6061 alloy. The method used in this research is by using  cutting tool (Wc + Co) coated with Titanium Aluminum Nitride and Titanium Nitride coating materials (TiAlN / TiN) using CNC lathe and dividing the three cutting conditions ie at cutting speed of 800 m / min, 1000 m / min and 1200 m / min. The result of the cutting condition is at a cutting speed of 1200 m / min resulting in a larger VB size when compared to 800 m / min cutting speed and 1000 m / min with each cutting time of six minutes.Keywords: Cutting Speed (Vc), Flank Wear (VB), Cutting Tool

PEMBUATAN GELAS DENGAN BAHAN POLYPROPYLENE DENGAN MENGGUNAKAN CETAKAN PLASTIK

Saifuddin, Saifuddin, Usman, Ramli, Zuhaimi, Zuhaimi

Jurnal POLIMESIN Vol 16, No 2 (2018): Polimesin
Publisher : Politeknik Negeri Lhokseumawe

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Abstract

Mould adalah alat yang digunakan untuk menghasilkan produk, yang salah satunya adalah pembentukan produk dari bahan plastik dan dilakukan pada jenis mesin injeksi. Untuk menghasilkan sebuah mould secara tepat, tentunya banyak faktor yang harus dipertimbangkan sehingga produk yang dihasilkan dapat memenuhi standar kualitas yang diinginkan secara optimal baik itu dari kepresisian dimensi, kompleksitas geometri, maupun efisiensi proses. Oleh karena itu sangat diperlukan pengetahuan dan pemahaman tentang dasar teknik desain cetakan, proses manufaktur, proses injeksi dan parameter lain yang berpengaruh terhadap perancangan mould dan produk hasil cetakannya. Tujuan penelitian ini adalah merencanakan satu unit cetakan injection moulding untuk membuat cetakan gelas. Metode yang digunakan adalah dengan merencanakan pembuatan mould yang meliputi proses desain/perancangan, pemilihan bahan produk, pemilihan bahan cetakan dan proses manufakturnya. Berdasarkan perhitungan bagian utama cetakan  maka didapat total keseluruhan volume produk adalah 523,124 mm3, berat produk 47,081 gram  dan gaya injeksi yang di dibutuhkan dalam proses pencetakan ialah: 154,6 N. Kata kunci: Cetakan Plastik, Sistem Injeksi, Cetakan standart, Polypropylene  Abstract Mold is a tool used to produce products, one of which is the formation of products from plastic materials and is carried out on the type of injection machine. To produce a mold appropriately, of course there are many factors that must be considered, so that the product produced can meet the desired quality standards optimally, whether from dimensional precision, geometry complexity, or process efficiency. Therefore, there is a great need for knowledge and understanding of the basis of mold design techniques, manufacturing processes, injection processes and other parameters that influence the design of molds and printed products. The purpose of this study was to plan a single injection molding mold to make glass molds. The method used is to plan the manufacture of mold which includes the design / design process, product material selection, selection of printed materials and the manufacturing process. Based on the calculation of the main part of the mold, the total volume of the product is 523.124 mm3, the product weight is 47.081 grams and the injection force required in the printing process is: 154.6 N. Keywords: Plastic Mold, Injection System, Standard Mold, Polypropylene

KAJI EFISIENSI TEMPERATUR PENUKAR PANAS DENGAN VARIASI ALIRAN UNTUK APLIKASI PENGERING

syukran, syukran

Jurnal POLIMESIN Vol 16, No 2 (2018): Polimesin
Publisher : Politeknik Negeri Lhokseumawe

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Abstract

Abstrak Heat exchanger atau alat penukar panas adalah alat-alat yang digunakan untuk mengubah temperatur fluida atau mengubah fasa fluida dengan cara mempertukarkan panasnya dengan fluida lain. Pada sebuah penukar panas kemampuan mempertukarkan panas sangat ditentukan oleh tipe dan jenis aliran fluida yang melewati penukar panas. Secara garis besar penukar panas dibagi berdasarkan arah aliran fluidanya. Berdasarkan arah aliran fluida penukar panas  dibedakan menjadi 3 (tiga) jenis aliran, yaitu aliran searah (parallel flow), aliran berlawanan (counter flow) dan aliran silang (cross flow). Saat ini penukar panas banyak dipakai dalam  industri pengeringan produk-produk pertanian, perkebunan dan perikanan skala kecil dan menengah. Penggunaan penukar panas dalam bidang pengeringan saat ini sudah menjadi kebutuhan untuk mengatasi permasalahan produktifitas pengeringan. Umumnya penukar panas yang digunakan adalah tipe aliran berlawanan. Beberapa penelitian telah dilakukan untuk mengetahui efektifitas penukar panas tersebut yang umumnya berfokus pada jenis aliran berlawanan. Penelitian penelitian spesifik yang mengkaji perbandingan efisiensi penukar panas  untuk ketiga jenis aliran belum ditemukan. Penelitian ini dilakukan untuk mengetahui efisiensi temperatur penukar panas untuk jenis aliran jenis aliran melintang, sejajar, dan  berlawanan. Metode penelitian dilakukan fabrikasi 3 unit exchanger tipe gas-gas dengan dimensi 50 (P) x 10 (L) x 30 (T) dengan jumlah tube 17 susunan. Hasil  penelitian menunjukkan bahwa efisiensi temperatur untuk ketiga jenis penukar panas tersebut adalah 21,3% aliran melintang, 17,3% aliran berlawanan dan 15,9%  aliran sejajar. Hasil penelitian menyimpulkan bahwa efisiensi temperatur tertinggi diperoleh jenis penukar panas aliran melintang. Kata kunci : Penukar panas, aliran sejajar, aliran berlawanan, aliran silang, temperatur.  Abstrack Heat exchangers or heat exchangers are the means used to change the temperature of the fluid or to change the fluid phase by exchanging heat with other fluids. In a heat exchanger the heat exchange ability is greatly determined by the type and type of fluid flow passing through the heat exchanger. Broadly speaking the exchanger is divided based on the direction of fluid flow. Based on the direction of fluid flow exchanger is divided into 3 (three) types of flow, namely parallel flow, counter flow and cross flow. Currently, heat exchangers are widely used in the drying industry of small and medium-sized agricultural and small-scale plantation and fishery products. The use of exchangers in the field of drying is now a need to overcome the problems of drying productivity. Generally the exchanger used is the opposite flow type (counter flow). Several studies have been conducted to determine the effectiveness of these exchangers which generally focus on the opposite type of flow. Specific research studies that reviewed the efficiency of exchangers for the three types of flow have not been found. This research was conducted to find out the efficiency of heat exchanger temperature for flow type of cross flow, parallel flow and counter flow type. The research method was fabricated 3 units of gas-gas exchanger type with dimension 50 (P) x 10 (L) x 30 (T) with the number of tubes 17 staggered arrangement. The results show that the temperature efficiency for the three types of heat exchanger is 21.3% cross flow flow, 17.3% flow counter flow and 15.9% parallel flow flow. The results concluded that the highest temperature efficiency obtained by cross flow flow type exchanger. Keywords: Heat exchanger, parallel flow, counter flow, cross flow, temperature

Perbandingan Sampah Organik Rumah Tangga dengan Sampah Organik Pasar terhadap Kuantitas Biogas

Mulyanto, Subur, Zulkifli, Zulkifli, Milaningrum, Elisabeth

Jurnal POLIMESIN Vol 16, No 2 (2018): Polimesin
Publisher : Politeknik Negeri Lhokseumawe

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Abstract

Abstrak Penelitian ini bertujuan untuk mengetahui bagaimana cara dan proses pembuatan biogas untuk mendapatkan hasil yaitu gas metana (CH4) secara maksimal dengan menggunakan bahan dari sampah organik makanan rumah tangga dan sampah organik pasar. Jenis penelitian ini adalah eksperimen, dimana penulis melakukan perencanaan, perancangan, pembuatan, dan pengujian secara langsung dilapangan untuk mengetahui hasil dari percobaan tersebut. Proses dalam penelitian menggunakan bahan baku sampah pasar dan sampah organik rumah tangga yang kemudian masing–masing difermentasi selama 12 hari, setelah  dilakukan pengambilan sampel untuk uji nyala dan uji kandungan gas metana yang dihasilkan. Hasil penelitian menunjukan bahwa sampah organik pasar lebih baik digunakan sebagai bahan untuk pembuatan biogas dibandingkan dengan sampah makanan rumah tangga dikarenakan sampah organik pasar tidak memerlukan waktu yang lama untuk terbakar, pada proses pengujian kandungan gas metana sampah organik pasar memiliki kandungan gas metana yang lebih tinggi yaitu 52,8 % dibandingkan dengan sampah organik rumah tangga yang hanya 0,29 %.Kata kunci:  Biogas, Gas metana (CH4), Sampah organik pasar, Sampah organik rumah tangga, fermentasiAbstract This study aims to find out how the way and process of biogas production to obtain the results of methane (CH4) to the maximum by using materials from organic household food waste and organic waste market. This type of research is experimental, where the authors do the planning, design, manufacture, and testing directly in the field to find out the results of the experiment. The process in this study includes the selection of materials divided into 2, namely market waste and household organic waste which then each fermented for 12 days, after sampling for the test flame and test the methane gas content produced. The results showed that the market organic waste is better used as a material for the manufacture of biogas compared with household food waste because the market organic waste does not require a long time to burn, in the process of testing the methane gas content of organic waste market has a higher methane gas content 52.8% compared with household organic waste which is only 0.29%.Keywords: Biogas, Methane (CH4), Organic waste market, Household organic waste, fermentation

PENGARUH TIPE BANTALAN BOLA PADA POROS POMPA SENTRIFUGAL TERHADAP SINYAL GETARAN

hajar, Ibnu

Jurnal POLIMESIN Vol 16, No 1 (2018): Polimesin
Publisher : Politeknik Negeri Lhokseumawe

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Abstract

Pompa sentrifugal merupakan salah satu pompa yang sangat banyak digunakan pada industri pengolahan, seperti industri pengolahan air minum, industri pengolahan minyak, dan pabrik kelapa sawit. Bentuknya sederhana dan biaya perawatan lebih murah. Permasalahan yang sering terjadi pada pompa sentrifugal adalah kerusakan pada bantalan poros yang diakibatkan oleh getaran, keausan, dan misalignment. Pada makalah ini membahas pengaruh tipe bantalan bola terhadap sinyal getaran poros pompa sentrifugal satu tingkat. Tujuan penelitian ini adalah mengetahui dan mendapatkan pengaruh tipe bantalan bola pada poros pompa sentrifugal dengan mengukur sinyal getaran. Pompa yang digunakan dalam penelitian ini adalah pompa sentrifugal yang mempunyai head tekanan  9 meter, debit aliran 3 liter/detik dan daya output 746 watt. Metode penelitian dengan mengamati dan analisis perilaku sinyal getaran yang terdiri dari simpangan (displacement), kecepatan( velocity) dan percepatan (acceleration) pada bantalan bola pompa sentrifugal pada titik P-01 dan P-02 dari arah aksial, vertikal dan horizontal. Pengukuran sinyal getaran dilakukan dengan menggunakan alat ukur Vibrometer Analog VM-3314A. Bantalan (bearing) yang gunakan dalam penelitian ini adalah tipe cylindrical roller bearing dan  roller ball bearing yang dipasang pada poros pompa sentrifugal untuk diamati dan ukur sinyal getarannya. Hasil pengujian menunjukkan bahwa harga simpangan tertinggi 37,125 µm terjadi bantalan tipe ball bearing arah horizontal pada titik pengukuran P-02 tinggi tekan 3 meter dengan debit aliran 2,8 liter/detik. Sedangkan harga simpangan terendah  27,1 µm terjadi pada cylindrical roller bearing dengan tinggi tekan 3 meter dan debit aliran 2,8 liter/detik. Dengan naiknya tinggi tekan pada pompa sentrifugal menyebabkan turunnya getaran pompa sesuai penurunan beban pada pompa, sehingga untuk pompa sentrifugal satu tingkat lebih aman menggunakan tipe cylindrical roller bearing.Kata kunci: Tipe bantalan, pompa sentrifugal, sinyal getaranAbstractCentrifugal pumps are one of the most widely used pumps in the processing industry, such as the drinking water treatment industry, the oil processing industry and the palm oil mill, in addition to the simpler and cheaper maintenance costs. The most common problem with centrifugal pumps is damage to the shaft bearings caused by vibration, wear and misalignment. This paper discusses the effect of ball bearing type on the single-stage centrifugal pump vibration signal. The purpose of this research is to know and get the influence of ball bearing type on centrifugal pump shaft by measuring vibration signal. The pumps used in this study are centrifugal pumps that have a 9-meter pressure head, a flow rate of 3 liters / second and a power output of 746 watts. Research method by observing and analyzing vibration signal behavior consist of displacement, velocity and acceleration on centrifugal pump ball bearing at point P-01 and P-02 from axial, vertical and horizontal direction. Measurement of vibration signal is done by using Analog Vibrometer VM-3314A. Bearings used in this study are cylindrical roller bearing and roller ball bearings mounted on the centrifugal pump shaft to be observed and measure the vibration signal. Test results showed that the highest deviation 37,125 μm occurred bearing type ball bearing horizontal direction at the point of measurement P-02 high press 3 meter with flow debit 2,8 liter / second. While the lowest 27.1 μm deviation occurred in cylindrical roller bearing with 3 meter press and 2.8 liter / second flow rate. With the increase in the height of the tap on the centrifugal pump causes the decrease of pump vibration according to the load decrease at the pump, so for the centrifugal pump one level safer using cylindrical roller bearing type.Keywords: Bearing type, centrifugal pump, vibration signalCentrifugal pumps are one of the most widely used pumps in the processing industry, such as the drinking water treatment industry, the oil processing industry and the palm oil mill, in addition to the simpler and cheaper maintenance costs. The most common problem with centrifugal pumps is damage to the shaft bearings caused by vibration, wear and misalignment. This paper discusses the effect of ball bearing type on the single-stage centrifugal pump vibration signal. The purpose of this research is to know and get the influence of ball bearing type on centrifugal pump shaft by measuring vibration signal. The pumps used in this study are centrifugal pumps that have a 9-meter pressure head, a flow rate of 3 liters / second and a power output of 746 watts. Research method by observing and analyzing vibration signal behavior consist of displacement, velocity and acceleration on centrifugal pump ball bearing at point P-01 and P-02 from axial, vertical and horizontal direction. Measurement of vibration signal is done by using Analog Vibrometer VM-3314A. Bearings used in this study are cylindrical roller bearing and roller ball bearings mounted on the centrifugal pump shaft to be observed and measure the vibration signal. Test results showed that the highest deviation 37,125 μm occurred bearing type ball bearing horizontal direction at the point of measurement P-02 high press 3 meter with flow debit 2,8 liter / second. While the lowest 27.1 μm deviation occurred in cylindrical roller bearing with 3 meter press and 2.8 liter / second flow rate. With the increase in the height of the tap on the centrifugal pump causes the decrease of pump vibration according to the load decrease at the pump, so for the centrifugal pump one level safer using cylindrical roller bearing type. Keywords: Bearing type, centrifugal pump, vibration signal

RANCANG ULANG MESIN PENYAYAT DAGING SAPI UNTUK BAHAN BAKU MEMBUAT ABON MENGGUNAKAN MOTOR LISTRIK 1 HP

Hasrin, Hasrin, Zuhaimi, Zuhaimi, Sumardi, Sumardi

Jurnal POLIMESIN Vol 16, No 1 (2018): Polimesin
Publisher : Politeknik Negeri Lhokseumawe

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Abstract

The high consumption of processed beef products is a separate business opportunity to be developed. The shifting consumption pattern of the people in consuming processed beef products from fresh meat to processed products ready to encourage some parties to develop technology in terms of processing beef. In making abon now it is still traditional by using hands, knives or forks to cut the meat after the boiling process until cooked to be made abon. By using such manual equipment of course the process of making abon will take a long time, greater energy, and besides also slicing meat by pounding using a fork is considered less safe for workers. The purpose of this research is to get a tool / machine penyya beef is simpler for raw materials to make abon using electric motor 1 hp. Changes in the redesigned construction consist of: cylinder casing design, inlet and outlet ducts, container tubs and placemats. The result of the test has been tested by 1 kg of beef, thus showing the measured fiber texture measurement results consist of: 0.5 mm thickness, 30 mm length; 1 mm thick, 35 mm long and 1.5 mm thick, 35 mm long. Capacity of beef cultivation yields are: 3.3 ounces / minute or 1 kg / 3 minutes. So it can be concluded the closer the gaps in the cassing, then the result of the incision the better (smoother). Keywords: Meat meat machine, inlet hopper, cylinder case

OPTIMALISASI SISTEM TATA UDARA GEDUNG PERKANTORAN BERTINGKAT DENGAN METODE SIX SIGMA (Studi Kasus Gedung PT.Bank Aceh Cabang Lhokseumawe)

Syamsuar, Syamsuar

Jurnal POLIMESIN Vol 16, No 1 (2018): Polimesin
Publisher : Politeknik Negeri Lhokseumawe

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Abstract

The use of energy in the air system of PT. Bank Aceh Lhokseumawe branch annually averages 60 - 75% of total energy consumption in buildings. The purpose of this research is to optimize energy use in air system continuously using Six Sigma approach. The six sigma approach is expected to reduce the cost of using the air system system without neglecting the comfort level according to the national comfort standard (SNI). The problem faced by the air system is the existence of over cooling load (over cooling load), the value reaches the figure beyond the initial 60,000 watts planning capacity. The calculation results obtained actual average cooling load reached 75,580.3 watts. It is known that the cooling overload is caused by several factors, namely: the quantity of occupant / human, the air ventilation factor, the management factor of electric appliances usage, the lighting factor, and the solar radiation / transmission factor. Solutions to improve the air conditioning system by minimizing the factors that cause over cooling load. The results of the improvement get a cooling load of 57,340.9 watts which means savings of 24.2%, or monthly electrical energy savings of 4,428.324 kwh / month or equivalent to 50,739.888 kwh / year. Keywords: cooling load, six sigma, optimization, critical to quality

DESAIN DAN FABRIKASI PATOK RINTANGAN LAPANGAN GOLF BAHAN POLYMERIC FOAM YANG DIPERKUAT SERAT TANDAN KOSONG KELAPA SAWIT

Zulfahmi, Zulfahmi

Jurnal POLIMESIN Vol 16, No 1 (2018): Polimesin
Publisher : Politeknik Negeri Lhokseumawe

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Abstract

A golf course with obstacles in the forms of water obstacle and lateral water obstacle marked with the stakes which are called golf course obstacle stake in this study. This study focused on the design and fabrication of the golf course obstacle stake with a solid cylindrical geometry using EFB fiber-reinforced polymeric foam composite materials. To obtain the EFB fiber which is free from fat content and other elements, EFB  is soaked in the water with 1% (of the watre total volume) NaOH. The model of the mould designed is permanent mould that can be used for the further refabrication process. The mould was designed based on resin-compound paste materials with talc powder plus E-glass fiber to make the mould strong. The composition of polimeric foam materials comprised unsaturated resin Bqtn-Ex 157 (70%), blowing agent (10%), fiber (10%), and catalyst (10%).  The process of casting the polimeric foam composit materials into the mould cavity should be at vertical casting position, accurate interval time of material stirring, and periodical casting. To find out the strength value of the golf course obstacle stake product, a model was made and simulated by using the software of Ansys workbench 14.0, an impact loading was given at the height of 400 mm and 460 mm with the variation of golf ball speed (USGA standard) v = 18 m/s, v =35 m/s, v = 66.2 m/s, v = 70 m/s, and v = 78.2 m/s. The clarification showed that the biggest dynamic explicit loading impact of Fmax = 142.5 N at the height of 460 mm with the maximum golf ball speed of 78.2 m/s did not experience the hysteresis effect and inertia effect. The   largest deformation area occured at the golf ball speed v = 66.2 mm/s, that is 18.029 mm (time: 2.5514e-004) was only concentrated around the sectional area of contact point of impact, meaning that the golf course obstacle stakes made of EFB fiber-reinforced polymeric foam materials have the geometric functional strength that are able to absorb the energy of golf ball impact. Keywords: Composite, Polymeric Foam, EFB Fiber, Tension Distribution, Ansys Workbench 14.0

APLIKASI TEKNIK MANUFAKTUR VACUUM ASSESTED RESIN INFUSION (VARI) UNTUK PENINGKATAN SIFAT MEKANIK KOMPOSIT PLASTIK BERPENGUAT SERAT ABACA (AFRP)

Dabet, Abubakar, Indra, Indra, Hafli, Teuku

Jurnal POLIMESIN Vol 16, No 1 (2018): Polimesin
Publisher : Politeknik Negeri Lhokseumawe

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Abstract

AbstrakInovasi dalam bidang material komposit menuntut terciptanya material yang lebih ramah lingkungan.  Saat ini komposit serat alam (green material) patut dipertimbangkan menjadi material yang sangat berpotensi untuk mensubstitusi komposit serat sintetis sebagai material teknik. Serat alam mempunyai kekurangan karena mempunyai scatter sifat mekanik yang sangat besar. Salah satu cara untuk mengatasi kekurangan tersebut adalah melalui pemilihan proses manufaktur (fabrikasi) komposit. Tujuan penelitian ini adalah membuat prototype komposit plastik berpenguat serat abaca (AFRP)  menggunakan metode Vakum (Vacum Assested Resin Infusion (VARI)). Semua spesimen dilakukan postcure pada suhu 800 C selama 2 jam. Sifat mekanik dari komposit dievaluasi uji tariknya. Komposit AFRP difabrikasi dengan fraksi volume (Vf) : 20%, 30% , 40%, serta ukuran spesimen uji (140x5x1) mm. Dengan proses fabrikasi sebagai berikut: 1) Serat abaca disusun dalam cetakan kaca yang memanjang sejajar (00) kemudian dimasukkan ke dalam kantong plastik vakum. 2) Resin dicampur hardener dialirkan kedalam cetakan yang sudah kondisi vakum. Metode cetakan ini dapat menghilangkan gelembung udara di dalam komposit sehingga diharapkan kekuatan tarik komposit menjadi lebih tinggi.  Bahan-bahan yang diperlukan dalam penelitian ini adalah: Serat abaca, Resin BTQN 157-EX, Hardener MEKPO dan Wax. Peralatan yang diperlukan adalah: Instalasi cetak vakum, Alat uji tarik, Kamera digital, dan Scanning Electron Microscope (SEM). Penampang patahan diselidiki untuk mengidentifikasi mekanisme perpatahannya.  Hasil penelitian menunjukkan bahwa kekuatan dan regangan tarik komposit memiliki harga optimum untuk (Vf) 40%, yaitu 257 Mpa dan 0.44%.  Penampang patahan komposit diklasifikasikan sebagai jenis patah slitting in multiple area sehingga dapat disimpulkan bahwa komposit plastik berpenguat serat abaca memiliki potensi yang cukup besar untuk diaplikasikan sebagai material struktural. Kata kunci: Serat Abaca, AFRP, Kekuatan tarik, VARI, Scanning Electron Microscope AbstractInnovation in composite materials demands the creation of more environmentally friendly materials. Currently the composite of natural fibers (green material) should be considered to be a material that has the potential to substitute synthetic fiber composites as engineering materials. Natural fibers have disadvantages because they have a very large mechanical properties scatter. One way to overcome these shortcomings is through the selection of a composite manufacturing (fabrication) process. The purpose of this research is to make prototype of plastic composite with abaca fiber (AFRP) using Vacuum Assured Resin Infusion (VARI)). All specimens were performed postcure at 800 C for 2 hours. The mechanical properties of the composites are evaluated by the tensile test. The AFRP composite is fabricated by volume fraction (Vf): 20%, 30%, 40%, as well as test specimen size (140x5x1) mm. With the fabrication process as follows: 1) Abaca fiber is arranged in a parallel laminated glass mold (00) then put in a vacuum plastic bag. 2) The resin in the mixed hardener flowed into a mold that has a vacuum condition. This mold method can remove air bubbles inside the composite so that the expected composite tensile strength becomes higher. The materials needed in this research are: Abaca fiber, BTQN 157-EX Resin, MEKPO and Wax Hardener. The necessary equipment are: Vacuum printing installation, Tensile test equipment, Digital camera, and Scanning Electron Microscope (SEM). Fault cross sections were investigated to identify the fracture mechanism. The results showed that the strength and composite tensile strain had the optimum price for (Vf) 40%, ie 257 Mpa and 0.44%. The composite fault cross section is classified as a type of broken slitting in multiple areas so it can be concluded that the plastic composite of abaca fibers has considerable potential to be applied as a structural material. Keywords: Abaca Fiber, AFRP, Tensile Strength, VARI, Scanning Electron Microscope