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All Journal Jurnal Teknologi Malikussaleh Journal of Mechanical Science Technology Jurnal Polimesin
Abdul Rahman
Jurusan Teknik Mesin, Universitas Malikussaleh
Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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ANALISA KEKUATAN SAMBUNGAN MATERIAL AISI-1045 DENGAN SS-304 MENGGUNAKAN LAS SMAW Aljufri, Aljufri; Dabet, Abubakar; Rahman, Abdul; Zulfahmi, Zulfahmi
Malikussaleh Journal of Mechanical Science Technology Vol 5, No 2 (2021): Malikussaleh Journal of Mechanical Science and Technology
Publisher : Malikussaleh University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/mjmst.v5i2.5937

Abstract

Penelitian ini dilakukan untuk mengetahui kekuatan daerah  lasan   yang proses pengelasannya menggunakan dua jenis material yang berbeda,   juga menggunakan  kuat arus dan variasi kampuh yang berbeda. Tujuan penelitiaan ini untuk menganalisa dan mengetahui perbandingan kuat arus pada hasil pengelasan SMAW terhadap material baja AISI 1045 dengan  SS-304, menggunakan variasi kuat arus pengelasan 80 A, 90 A 100 A menggunakan elektroda E 309-16. serta mengetahui sifat mekanik  spesimen las menggunakan ASTM - E8. Dari pengujian yang dilakukan didapatkan hasil dimana pada spesimen hasil pengujian tarik terutama  daerah patahan atau putusnya spesimen tidak terjadi pada daerah lasan tapi putus nya pada daerah logam induk sekitar 20 mm dari daerah HAZ. begitu juga dengan spesimen lainya, ini juga menunjukan perihal tentang penggunaan jenis kampuh serta kuat arus yang divariasikan sehingga nilai regangannya atau perpanjangannya sangat berpengaruh terhadap kedua jenis logam yang digunakan pada penelitian ini. sehingga sambungan las yang dihasilkan cukup baik dan memiliki kekuatan yang tangguh, ini dibuktikan dengan hasil pengujian yang dihasilkan pada spesimen yang putus bukan pada daerah sambungan las melainkan pada logam induk
Desain Poros Mesin Penghancur Sampah Organik Dengan Daya 1 HP Rahman, Abdul; Islami, Nurul; Asnawi, A; Safrizal, S
Malikussaleh Journal of Mechanical Science Technology Vol 5, No 2 (2021): Malikussaleh Journal of Mechanical Science and Technology
Publisher : Malikussaleh University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/mjmst.v5i2.5947

Abstract

Pada umumnya mesin pencacah digerakkan oleh motor penggerak yang mana memiliki sistem kerja motor memutar pulley bergerak, kemudian ditransmisikan ke sistem menggunakan transmisi belt untuk memutar poros utama dimana yang terdapat pisau (cruiser) pencacah dan bantalan sebagai penyeimbang poros. Untuk menjaga supaya produksi tetap berjalan dengan baik poros harus mendapat perawatan, sehingga tidak terjadi kemacetan pada waktu produksi. Kajian ini menjelaskan perhitungan pada batang poros yang digunakan pada sistem kerja mesin pencacah limbah rumah tangga untuk kompos. Dalam perancangan poros perlu memperhatikan beberapa faktor, misalnya: kelelahan, tumbukan dan pengaruh konsentrasi tegangan bila menggunakan poros bertingkat. Bahan poros terbuat dari baja S45C (baja karbon sedang) dengan spesifikasi tegangan tarik pabrikan sebesar 569 MPa atau 58 kg/mm2. Diameter poros 19 mm yang dianalisa adalah posisi tumpuan dengan panjang total poros 400 mm. putaran yang ditransmisi dari motor dan diterima poros sebesar 560 RPM, puntiran yang diterima sebesar 2,51 N.mm. Beban kerja yang diterima poros relatif beban sedang karena putaran yang tidak memiliki hentakan dari limbah organik (sayur-sayuran limbah pasar). Kekuatan poros juga akan ditentukan oleh kerja pisau penghancur yang dipasang pada pipa selubung yang melekat pada poros utama. Hasil analisa poros dengan mempertibangkan factor keamanan, faktor koreksi dan putaran poros, maka poros dapat bekerja dengan baik dan aman.
PERANCANGAN MESIN MODIFIKASI CAMSHAFT TIPE SINGLE CUTTER MENGGUNAKAN AUTODESK INVENTOR Aljufri Aljufri; Abdul Rahman; Syarifah Akmal; Ranu Firmansyah; Abdul Ali Chaniago
Jurnal Teknologi Vol 15, No 2 (2023): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.15.2.299-304

Abstract

Camshaft is one of the main components of a 4-stroke motorcycle where the Camshaft has a function as a regulator of opening and closing valves in the working process of the engine itself.  The profile of the camshaft that is thirsty due to friction so that it must be replaced with a new one or do cam turning using a grinder. The purpose of this design is to design a camshaft engine, which is designed to facilitate the work of mechanics, especially motorcycle mechanics. and can be used as a tool to modify the camshaft setandart into camshaft racing. This engine will be able to produce Camshaft racing. In the process of machine design is carried out in several stages, namely analyzing needs, defining and listing design requirements, designing product concepts, and designing products and documenting products in the form of machine design drawings. The energy source is supplied from electricity. The results of this design resulted in the design and working drawings of camshaft modified engine products including shafts, camshaft mounts, pulley mounts, engine frames, and transmission systems. In this design, camshafts will also be tested with 3 variations of camshaft profiles to determine the value of power and torque due to changes in camshaft diameter. From the three test results, standard camshaft variations and modifications found changes in power and torque values which increased in value by 1 hp and clutch slip occurred during the dayno process which showed a fracture at engine speed 8000 rpm.
Effects of bioethanol addition to the biodiesel-diesel fuel blend on diesel engine exhaust emissions Asnawi Asnawi; Muhammad Muhammad; Abdul Rahman; Nurul Islami; Diki Dian Andika; Ihsanul Fikri Hutabarat; Irwansyah Situmorang
Jurnal POLIMESIN Vol 21, No 3 (2023): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i3.3460

Abstract

The transition of energy sources from fossil fuel to biofuel is becoming a major topic in the world towards renewable energy to reduce greenhouse gas emissions, improve environmental air quality, and reduce dependence on fossil fuel in the future. This study aims to evaluate the effect of increasing the concentration of oxygenated biofuel in diesel fuel on the emissions of diesel engines. In this study, B30 (30% biodiesel and 70% diesel) was used as a base fuel, and a fraction of pure biodiesel (B100) was added to increase the biodiesel concentration in B30 fuel to create B40 (40% biodiesel and 60% diesel). Furthermore, the addition of 5% and 10% of bioethanol as a fuel additive in the fuel blend was conducted while maintaining a biodiesel concentration of 40%. The effect of bioethanol contained in the fuel blends was tested using a single-cylinder 418 cc diesel engine.  The experiment was carried out at an engine speed of 1000–3000 rpm. The result shows that the concentration of the diesel-biodiesel-bioethanol blend affected the emissions produced by the diesel engines. Combustion efficiency increased with the concentration of biodiesel in the diesel fuel, as shown by reduced CO emissions, increased CO2 emissions, and increased NOx emissions at engine speeds of 2000–3000 rpm. In comparison to 5% bioethanol at various engine speeds, adding 10% bioethanol has a disadvantageous effect on the combustion process, increasing CO and HC emissions.
Pengaruh Surface Roughnes Pada Material AISI 1045 dan AISI 4140 Akibat Proses Pemesinan Bubut Azhari, Wafiq; Aljufri, Aljufri; Rahman, Abdul; Putra, Reza; Akmal, Syarifah
Malikussaleh Journal of Mechanical Science and Technology Vol 7, No 1 (2023): Malikussaleh Journal of Mechanical Science and Technology
Publisher : Malikussaleh University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/mjmst.v7i1.12448

Abstract

Lathe machining is one type of conventional machine tool used for cutting/filling workpieces which is done by making an incision on the workpiece where the tool is moved translationally and parallel to the axis of the rotating workpiece. The result of the components of the turning process that is commonly done is surface roughness which is influenced by tool cutting angle, feeding speed, cutting speed, depth of cut. This study was conducted to determine how much influence the speed of feeding and depth of feeding on AISI 1045 steel and AISI 4140 steel materials used in shafts, conecting roads, gears with carbide chisels. With Vc=140 m/min, Vc=150 m/min, Vc=170 m/min, and Vc=180 m/min, and knowing the surface roughness of the workpiece using a carbide tool.  From the results of research on AISI 1045 and AISI 4140 steel for cutting along 50 mm with engine speed 1200 rpm and cutting depth 0.3 mm, as well as the cutting speed used Vc=140 m/min, Vc=150 m/min, Vc=170 m/min and Vc=180 m/min and the initial cutting distance of 4 mm, the time needed is 1,125 minutes. For the surface roughness value of AISI 1045 steel material and AISI 4140 steel has four variations in lathe feeding speed in this study, which in each variation has a different surface roughness value, the smallest surface roughness value is AISI 4140 steel with a feeding speed vc = 180 m / min surface roughness value of 0.705 μm compared to AISI 1045 steel material. This is due to the greater the movement of the feeding speed of feeding, the smaller the value of the surface roughness of the material
ANALISA PENGARUH HOLDING TIME DAN TEMPERATUR PADA PACK CARBURIZING MENGGUNAKAN LIMBAH KULIT SINGKONG TERHADAP SIFAT FISIK DAN MEKANIK BAJA 1020 Fikri, Ali; Muhammad, Muhammad; Rahman, Abdul; Putra, Reza; Habibi, Muhammad
Malikussaleh Journal of Mechanical Science and Technology Vol 7, No 2 (2023): Malikussaleh Journal of Mechanical Science and Technology
Publisher : Malikussaleh University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/mjmst.v7i2.13647

Abstract

The purpose of this study to determine the effect holding time on increasing the surface hardness of AISI 1020 steel material and analyzing the physical and mechanical properties of the results pack carburizing cassava peel waste on AISI 1020 steel. Process pack carburizing in this study have variations temperature 875oC and 900oC withholding time 60 minutes, 80 minutes, 100 minutes and 120 minutes. The catalyst used in this study was a carbonate compound, namely 20% BaCo3 to accelerate the reaction of adding carbon. The research results show that pack carburizing from cassava peel waste carbon can increase the surface hardness of AISI 1020 steel or part of the mechanical properties of the material. Testing at a temperature of 875oC withholding time 60 minutes which is 10.7 HRC and is the lowest value in the study while the highest hardness value occurs at a temperature of 900OC withholding time 120 minutes is 48.2 HRC. Microstructure observation results (metallography) on the edges indicates the martensite phase. The more martensite phase, the higher the value of the surface hardness of the steel material in the same direction as the effect of the length of holding time(holding time)
Pengaruh Orientasi Arah Serat Terhadap Ketangguhan Impact Komposit Serat Daun Lidah Mertua dengan Metode Hand Lay-Up Azhari, Nur Jannah; Putra, Reza; Muhammad, M; Rahman, Abdul; Zulmiardi, Z
Malikussaleh Journal of Mechanical Science and Technology Vol 8, No 1 (2024): Malikussaleh Journal of Mechanical Science and Technology
Publisher : Malikussaleh University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/mjmst.v8i1.16462

Abstract

Perkembangan ilmu dalam bidang material mengalami kemajuan yang sangat pesat, manusia telah melakukan beberapa inovasi dalam penggunaan teknik material komposit serat alam untuk mendapatkan material yang memiliki kualitas lebih baik, Komposit serat alam merupakan perkembangan ilmu material yang saat ini mulai banyak dikembangkan karena memiliki sifat yang kuat, ringan, murah dan ramah lingkungan. Adapun jenis serat yang digunakan adalah serat daun lidah mertua (sanseviera trifasciata) yang digunakan sebagai penguat dan jenis resin yang digunakan adalah Resin Polyester Yucalac 157 BQTN. Kekuatan komposit serat alam dapat dipengaruhi oleh orientasi arah serat. Pada penelitian ini menggunakan orientasi arah serat 0°, 45°, 90°. Tujuan dari penelitian ini adalah untuk mengetahui seberapa besar pengaruh orientasi arah serat terhadap ketangguhan impact  dari material serat alam. Pembuatan komposit menggunakan metode hand lay up. Dari hasil pengujian impact yang dilakukan, penguat serat dengan orientasi 45° memiliki nilai kekuatan yang lebih tinggi dibandingkan dengan orientasi arah serat 0°, dan 90°. Terdapat nilai ketangguhan impact terbesar pada orientasi arah serat 45° berpenguat serat daun lidah mertua sebesar 0,187049  joule/mm2, orientasi arah serat 0° sebesar 0,17756 joule/mm2, dan nilai ketangguhan impact terendah pada orientasi arah serat 90° sebesar 0,075035  joule/mm2.
ANALISA INDIKATOR KINERJA TEROWONGAN ANGIN RANGKAIAN TERBUKA (OPEN CIRCUIT WIND TUNNEL) TIPE SUBSONIC Aditya, Vikra; Alchalil, Alchalil; Asnawi, Asnawi; Rahman, Abdul
Malikussaleh Journal of Mechanical Science and Technology Vol 7, No 2 (2023): Malikussaleh Journal of Mechanical Science and Technology
Publisher : Malikussaleh University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/mjmst.v7i2.13658

Abstract

Fluid is a substance that can change its shape continuously due to the acting tangential shear force. Aerodynamics is a branch of fluid dynamics that studies specifically the forces acting on an object contained in a fluid flow. Wind Tunnel is a tool used in aerodynamics research to study airflow characteristics. Wind tunnel performance indicators include flow uniformity, flow and pressure distribution, aerodynamic forces acting on test objects in the wind tunnel. By using unsymmetrical airfoils, the impact of speed variations of 2 m/s, 4 m/s, 6 m/s, 8 m/s, 10 m/s and increasing angles of attack ranging from 0°, 5°, 10° on fluid flow can be determined. Tests were conducted in a section of the wind tunnel measuring 30 cm x 30 cm x 40 cm. Overall, the open-type wind tunnel has not been able to create uniform flow. The Reynolds number is at Re>4,000, so the wind tunnel under study is turbulent. The results of the speed variation and angle of attack increase also have an impact on the lift and drag coefficient values of the airfoil. At the maximum speed variation of 10 m/s with an angle of attack of 10°, the lift coefficient is 0.14350 and the drag coefficient is 0.15162.
Analisis Uji Tarik dan Bending Komposit Hybrid Serat Nanas dan Glasswool Dengan Matriks Polyester Hidayat, Rizki; Muhammad, Muhammad; Islami, Nurul; Putra, Reza; Rahman, Abdul
Malikussaleh Journal of Mechanical Science and Technology Vol 8, No 2 (2024): Malikussaleh Journal of Mechanical Science and Technology
Publisher : Malikussaleh University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/mjmst.v8i2.17436

Abstract

Salah satu serat yang dapat dimaanfaatkan sebagai bahan pengisi pada produk komposit yaitu serat nanas dan glasswool yang sangat mudah didapatkan serta ramah lingkugan. Tujuan penelitian ini adalah untuk menganalisis kekuatan tarik dan bending yang teringgi pada setiap variasinya. Spesimen uji dibuat menggunakan metode hand lay up dengan pengujian tarik menggunakan ASTM D638-02 dan bending ASTM D90. Hasil pengujian kekuatan tarik yang paling optimal terdapat pada fraksi volume (SN 40% : GW 20% ) dengan nilai rata-rata sebesar  = 37,11 MPa untuk kekuatan luluh sebesar 29,87 MPa dan regangan tarik sebesar  6,49 % pada variasi (SN 30% : 30% GW) nilai rata-rata sebesar  = 24,48 MPa untuk kekuatan luluh sebesar 18,38 MPa dan regangan sebesar  6,74%, variasi (SN 10% : GW 50%) rata-rata kekuatan tarik sebesar  =17,05 MPa dengan kekuatan luluh sebesar 13,89 MPa dan regangan meningkat sebesar  829%. Hasil pengujian bending tertinggi terdapat pada variasi (SN 40% : GW 20%) dengan rata-rata kekuatan bending sebesar 115,79 MPa untuk kekuatan luluh didapatkan sebesar 5,23 MPa untuk variasi (SN 30% :GW 30%) didapatkan kekuatan bending sebesar 90,19 MPa dengan kekuatan luluh 5,23 MPa dan variasi (SN 10% : 50% GW ) didapatkan kekuatan bending sebesar 68,13 MPa dengan kekuatan luluh 3,11 MPa. Pencampuran yang terbaik terjadi pada spesimen dengan komposisi 40% serat nanas dan 20% glasswool. Jenis patahan yang terjadi berupa getas.
Pengaruh Minyak Nabati Sebagai Pendingin Terhadap Temperatur dan Kekasaran Permukaan Baja ST 42 pada Proses Pembubutan Rangkuti, Mhd. Saleh; Aljufri, Aljufri; Rizki, Muhammad Nuzan; Rahman, Abdul; Muhammad, Muhammad
Malikussaleh Journal of Mechanical Science and Technology Vol 8, No 2 (2024): Malikussaleh Journal of Mechanical Science and Technology
Publisher : Malikussaleh University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/mjmst.v8i2.17669

Abstract

In the machining process, selecting the appropriate tool and coolant significantly affects the surface roughness of a product to be manufactured. The purpose of this research is to compare between soluble oil and vegetable oil as coolants in reducing roughness values and dissipating heat generated during the machining process of ST 42 steel. Carbide tools and vegetable oil coolants, namely cooking oil and castor oil, are used in this study, with soluble oil used as a reference. The machining process in this study employs conventional machining with a spindle speed of 1200 rpm, a cutting depth of 0.2 mm and 0.4 mm, and a cutting speed of 0.04 mm/minute. Temperature data collection during the machining process is carried out using a thermogun, and surface roughness testing is conducted using a Mitutoyo SJ-310 surface roughness tester. From the test results, the lowest roughness and temperature values are obtained at a cutting depth of 0.2 mm for all types of coolants used. The use of soluble oil yields the lowest average roughness and temperature values, which are 35.2 °C and 0.9 µm, respectively. Meanwhile, in the use of vegetable oil to minimize surface roughness, the lowest average value is found in cooking oil, which is 1.5 µm, and to minimize surface temperature during machining, castor oil coolant is the most effective, with a temperature of 40.1 °C.
Co-Authors Abdul Ali Chaniago Aditya, Vikra Akmal, Syarifah Alchalil Alchalil Aljufri Aljufri Asnawi Azhari, Nur Jannah Azhari, Wafiq Dabet, Abubakar Diki Dian Andika Hidayat, Rizki Ihsanul Fikri Hutabarat Irwansyah Situmorang M. Ali Fikri Muhammad Habibi Muhammad Muhammad Muhammad Nuzan Rizki Muhammad, M Muhammad, Muhammad Nurul Islami, Nurul Putra, Reza Rangkuti, Mhd. Saleh Ranu Firmansyah Safrizal, S Syarifah Akmal Zulfahmi Zulfahmi Zulmiardi, Z