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All Journal Teknika Rekayasa Mesin Jurnal Fisika FLUX Jukung (Jurnal Teknik Lingkungan) Jurnal Elemen AL-ULUM: JURNAL SAINS DAN TEKNOLOGI Jurnal Sains dan Teknologi Reaksi JURNAL CRANKSHAFT Scientific Journal of Mechanical Engineering Kinematika JTAM ROTARY Mechanical Engineering for Society and Industry Jurnal Pengabdian Ilung (Inovasi Lahan Basah Unggul) JURNAL POLI-TEKNOLOGI Jurnal Geografi, Lingkungan dan Kesehatan
Rudi Siswanto, Rudi
Universitas Lambung Mangkurat
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VARIASI KONDUKTIVITAS TERMAL PADA PROSES PEMOTONGAN SS400 DENGAN MEDIA PENDINGIN DROMUS TERHADAP KEKASARAN PERMUKAAN Mastiadi Tamjidillah; Rachmat Subagyo; Rudi Siswanto; Dhonie Adetya Rachman
Jurnal Rekayasa Mesin Vol. 14 No. 2 (2023)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v14i2.1083

Abstract

Thermal conductivity is a transport phenomenon where the temperature difference causes the transfer of thermal energy from the tip of the blade to the workpiece. The value of thermal conductivity is important for good conductors of surface roughness. Thermal conductivity is influenced by several factors, such as temperature, porosity, and voids. The effect of temperature on thermal conductivity is relatively small, but the conduction increases as the temperature increases, the larger the cavity, the less good the conductivity, which causes low surface roughness. This cutting process pays attention to parameter settings such as temperature, cutting speed, type of knife, and material. Likewise, fluid mechanics and hydraulics parameters such as the velocity of the cooling medium out, the pump pressure, the nozzle cross-sectional area, and the type of cooling medium. The thermal conductivity parameter is set to get the surface roughness results that vary due to thermal changes. Using the Waterjet Cutting Machine for the cutting process of SS400 Steel with a thickness of 12 mm with dromus cooling media to reduce thermal effects and reduce conductivity. With this dromus cooling medium, it is hoped that the surface roughness will be more optimal and avoid overheating. Using the Waterjet Cutting Machine for the cutting process of SS400 Steel with a thickness of 12 mm with dromus cooling media to reduce thermal effects and reduce conductivity. With this dromus cooling medium, it is hoped that the surface roughness will be more optimal and avoid overheating. By varying the temperature between the knife tip and the workpiece, good surface roughness is obtained at variations of the stand off distance of 8, 10, 12 mm, with a dromus at temperatures T1=47, T2=39 and T3=32, fluid velocity 300m/s, and pump pressure. 50.000 psi at turbulent flow Re 4000 gets the optimum result on the surface roughness test, which is 3.47 m.
ANALISIS HOTSPOT STRESS PADA SAMBUNGAN TUBULAR BRACE T DENGAN SIMULASI PEMBEBANAN TARIK PADA STRUKTUR BANGUNAN LEPAS PANTAI TIPE JACKET PLATFORM. Anwar; Rudi Siswanto
Jurnal Poli-Teknologi Vol. 22 No. 2 (2023)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v22i2.5535

Abstract

Abstract The jacket platform type offshore building structure is a building that is often used for oil and gas exploitation activities, environmental loads such as wave loads that occur continuously can cause the offshore building structure to experience fatigue. Tubular joints are areas that often experience fatigue or cracking due to stress concentrations that occur in the tubular joints. This research was conducted to find out and calculate the greatest stress points that occur in tubular joints for the T-brace model. The results showed that the hotspot stresses occurred in the elements in the welding area of the joints with a working stress value of 1577.3 Mpa and a value for calculating N integration of 12704.87. Keywords: Hotspot Stress, Tubular Joint, T Brace
Pemanfaatan Briket Limbah Sekam Padi Sebagai Energi Alternatif Di Desa Kayu Bawang Melalui Teknologi Briket Abdul Ghofur; Aqli Mursadin; Rudi Siswanto
Jurnal Pengabdian ILUNG (Inovasi Lahan Basah Unggul) Vol 3, No 3 (2024)
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/ilung.v3i3.11210

Abstract

Kegiatan Program Dosen Wajib Mengabdi (PDWA) melalui  Kemitraan Masyarakat umum atau masyarakat non produktif. Tujuan dari kegiatan ini adalah untuk membantu mitra dalam upaya memberikan solusi energi alternatif dan pemanfaatan limbah penggilingan padi di desa Kayu Bawang.. Sebagian besar kebutuhan energi  penduduk pedesaaan adalah untuk sektor rumah tangga dan usaha kecil. Berdasarkan data BPS Kabupaten Banjar tahun 2022, rata-rata produksi padi sawah di Gambut sebesar 39,41 ton/ha dengan luas lahan sawah sekitar 7,673 Ha. Secara otomatis, usaha penggilingan padi marak berada di Gambut, produk dari penggilingan padi akan menghasilkan 20 persen beratnya berupa kulit padi atau sekam. penggilngian padi ini biasanya hanya dibakar menjadi abu gosok atau digunakan menjadi campuran kompos. Pemanfaatan biomassa dengan pembakaran secara langsung tidaklah efektif karena densitas energi yang rendah sehingga biomassa perlu dikonversi dengan cara pemadatan, yang biasanya disebut briket. Selain dapat meningkatkan densitas energi dan kapasitas kalor, briket juga dapat memudahkan dalam penyimpanan dan pengangkutan. Namun briket memiliki kelemahan yaitu agak sulit terbakar saat pertama digunakanMetode yang gunakan adalah studi lapangan, diskusi, pembuatan cetakan briket. Target luaran yang dicapai dari kegiatan pengabdian masyarakat ini adalah produk cetakan briket sekam padi. Dari kegiatan ini dihasilkan produk briket sekam padi yang bisa digunakan sebagai energi alternatif  oleh warga di Desa Kayu Bawang ini. Meskipun nilai kalor briket sekam ini tidak terlalu besar namun pemanfaatan sekam sebagai limbah menjadi bahan bakar alternatif memberikan nilai yang positif.
ANALISA HASIL UJI KEKUATAN TARIK, TEKAN & STRUKTUR MAKRO SAMPAH PLASTIK JENIS PET, HDPE, DAN CAMPURAN (PET+HDPE) Ramagisandy, Holy; Siswanto, Rudi
JTAM ROTARY Vol 3, No 2 (2021): JTAM ROTARY
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jtam_rotary.v3i2.4366

Abstract

Plastik is a material which has difficult to decompose. Therefore, the utilization of waste into useful material is important to do. This study aims to identify the tensile strength, bending, and macro structure of recycled PET, HDPE, and PET + HDPE plastik waste mixtures and recommendations for plastik products that fit the characteristics of these plastik types. PET and HDPE plastik waste is melted with oil and reprinted into tensile and bending test samples in accordance with predetermined variations, and then the results of the fracture are analyzed in a macro structure. Based on tensile testing, the tensile strength test results have the highest stress and strain values obtained in the mixture of 40% + HDPE 60% (B2) used oil specimens of 10.58 MPa and strain values of 11.98%. The results of bending strength testing which has the highest bending stress value and maximum load value are obtained in plastik mixture specimens with 30% used oil mixture + 70% HDPE (B1) of 11.58 MPa and for maximum load values of 43.33 KN. Testing the tensile strength and bending strength of the type of plastik mixture Oil and HDPE + PET (50%: 50%), the results obtained can still not be recommended to be used as a paving block product because the value of stress, strain, bending stress, and the maximum load is still relatively low, namely for the tensile test the highest variation of stress value is 5.21 MPa, the highest variation of strain value is 5.23%, the maximum load value is 10 KN, and the highest variation of bending stress value is 40% + 60% by 4.01 MPa.
RE-DESIGN SISTEM DISTRIBUSI AIR BERSIH DAN FIRE HYDRANT DI GEDUNG PLN UP3B KALSELTENG Aji, Anas Satria; Siswanto, Rudi
JTAM ROTARY Vol 3, No 1 (2021): JTAM ROTARY
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jtam_rotary.v3i1.3464

Abstract

Sistem penyediaan dan distribusi air bersih di gedung-gedung bertingkat sering mengalami kendala. Tidak terkecuali PT. PLN (Persero) Gedung UP3B Kalselteng yang tidak luput dari permasalahan tersebut. Untuk itu perlu dilakukan perancangan ulang sistem distribusi dan penyediaan air bersih serta hidran kebakaran pada gedung. Tujuan dari penelitian ini antara lain menganalisis kebutuhan dan distribusi air bersih dan hidran kebakaran di dalam gedung. Kebutuhan air bersih dihitung berdasarkan jumlah penduduk yang mengkonsumsi air bersih, jenis dan jumlah unit beban alat perpipaan. Perhitungan head loss pada pipa menggunakan persamaan Hazen - William, Darcy-Weisbach dan Colebrook-White. Clean water supply and distribution systems in high-risk buildings often experience problems. No exception is the PT. PLN (Persero) UP3B Kalselteng Building which did not escape this problem. For this reason, it is necessary to re-design the distribution system and provide clean water and fire hydrants to the building. The objectives of this study include analyzing the needs and distribution of clean water and fire hydrants in the building. Clean water needs were calculated based on the number of people that consuming the clean water, the type and number of plumbing tools load unit. Calculation of head  loss  in  pipes  used Hazen – William, Darcy-Weisbach  and  Colebrook-White equation.Clean water supply and distribution systems in high rise buildings often experience problems. No exception is the PT. PLN (Persero) UP3B Kalselteng Building which did not escape this problem. For this reason, it is necessary to re-design the distribution system and provide clean water and fire hydrants to the building. The objectives of this study include analyzing the needs and distribution of clean water and fire hydrants in the building.Clean water needs was calculated based on the number of people that consuming the clean water, the type and number of plumbing tools load unit. Calculation of head  loss  in  pipes  used Hazen – William, Darcy-Weisbach  and  Colebrook-White equation.
PENGARUH TEMPERATUR TUANG TERHADAP POROSITAS, STUKTUR MIKRO DAN KEKERASAN DARI ALUMUNIUM WAJAN NAGARA DAN WAJAN JAWA MENGGUNAKAN PENGECORAN EVAPORATIF Yuono, Nanang; Siswanto, Rudi
JTAM ROTARY Vol 4, No 1 (2022): JTAM ROTARY
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jtam_rotary.v4i1.5664

Abstract

Aluminum and its alloys are the second largest metal materials used after steel. Applications and aluminum alloys are very diverse ranging from building vehicle bodies engine components components to ships to applications on airplanes. The strength and hardness of high aluminum alloys,one of the applications of aluminum as a component in the motor is as an ingredient for making alloy wheels, more specifically aluminum alloys. Used aluminum can be obtained from the remnants of the industry making aluminum doors, windows and frames, making aluminum shelves and storefronts, and other products with aluminum profiles as the main material. many of them use aluminum scrap as their main casting material to reduce production costs. Evaporative or casting casting using Styrofoam or a lost foam casting pattern is a casting using a material pattern that can evaporate when exposed to molten metal heat. Casting uses a temperature of 650 ° C, 700 ° C, 750 ° C, 800 ° C. The results of casting temperatures can affect porosity, microstructure, and hardness.
PENGARUH WAKTU KONTAK AIR LINDI DAN UDARA TERHADAP LAJU KOROSI BAJA ST-41 DAN ST-60 Riyadi, M. Irfan; Siswanto, Rudi
JTAM ROTARY Vol 4, No 2 (2022): JTAM ROTARY
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jtam_rotary.v4i2.6410

Abstract

Penggunaan logam di lingkungan sangat penting terutama di lingkungan seperti sampah pada alat berat atau truk, terutama yang di bak truk adalah alat untuk membawa berbagai sampah organik dan anorganik membawa bahan terlarut melalui cairan yang disebut lindi dan melakukan kontak atau kontak langsung dengan baja sehingga terjadi korosi akibat lindi atau aliran air limbah yang banyak mengandung senyawa korosif yang membuat bagian bak truk menjadi cepat terkorosi. Penelitian ini bertujuan untuk mengetahui baja bias menahan laju korosi. Baja yang digunakan adalah baja baja ST-41 dan ST-60 adalah baja karbon rendah dan baja karbon sedang. Metode yang digunakan dalam penelitian yaitu metode penurunan berat badan dan mengamati jenis korosi yang terjadi dengan cara perendaman dengan ASTM G31-72 yang divariasikan waktu kontak selama 3 minggu. Berdasarkan penelitian yang dilakukan menunjukkan laju korosi paling cepat terjadi pada baja ST-60 dengan waktu kontak 1 minggu direndam lindi dan 2 minggu kontak dengan udara karena perbedaan komposisi baja ST-60 dan baja ST-41 yang memiliki kandungan chromium yang sangat tinggi sehingga baja ST-41 lebih unggul dalam menahan laju korosi sedangkan jenis korosi yang terjadi adalah korosi merata dan korosi atmosferik. The use of metals in the environment is especially important in environments such rubbish in heavy equipment or trucks, especially those of the tailgate is a tool to bring a variety of organic waste and inorganic bring the matter dissolved through a liquid called leachate and make contact or direct contact with the steel so that corrosion occurs due to leachate or wastewater flow contains many corrosive compounds that make part tailgate become quickly corroded. This study aims to determine the bias steel resist corrosion rate. The steel used is steel steel ST-41 and ST-60 is a low carbon steel and medium carbon steel. The methods used in research in the methods of losing weight and observe the types of corrosion that occurs by means of immersion with ASTM G31-72 which vary contact time for 3 weeks. Based on research conducted showed the corrosion rate of the fastest occur in steel ST-60 with a contact time of 1 week soaked the leachate and 2 weeks in contact with the air due to differences in the composition of the steel ST-60 and steel ST-41 which has a chromium content so high that steel ST-41 is superior in resisting corrosion rate while the type of corrosion that occurs is evenly corrosion and atmospheric corrosion.
PENGARUH TEMPERATUR TUANG TERHADAP POROSITAS, STUKTUR MIKRO DAN KEKERASAN DARI ALUMUNIUM RONGSOK BALING-BALING KAPAL MENGGUNAKAN PENGECORAN EVAPORATIF Jumalik, Jumalik; Siswanto, Rudi
JTAM ROTARY Vol 4, No 1 (2022): JTAM ROTARY
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jtam_rotary.v4i1.5541

Abstract

Aluminum and its alloys are the second largest metal material used after steel. Aluminum applications and alloys are very diverse, ranging from buildings, vehicle bodies, engine components, components to ships, to applications on aircraft. The strength and hardness of aluminum alloys are high, one application of aluminum as a component on a ship is as a material for making propellers on traditional fishing boats, more specifically aluminum alloy. Used aluminum can be obtained from the remnants of the industry making aluminum doors, windows and frames, making aluminum racks and storefronts, and other products with aluminum profile as the main material. many of them use aluminum alloy scrap as their main casting material to reduce their production costs. Evaporative or casting casting using Styrofoam or lost foam casting patterns is casting using a pattern of materials that can evaporate when exposed to molten metal heat. Casting uses a temperature of 650°C, 700°C, 750°C, 800°C. The results of casting temperature can affect porosity, microstructure, and hardness.
PENGARUH TEMPERATUR TUANG TERHADAP POROSITAS, STUKTUR MIKRO DAN KEKERASAN DARI ALUMUNIUM RONGSOK VELG MENGGUNAKAN PENGECORAN EVAPORATIF Putra, Fajar Perdana; siswanto, rudi
JTAM ROTARY Vol 3, No 2 (2021): JTAM ROTARY
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jtam_rotary.v3i2.4119

Abstract

The second largest metal material used after steel is Aluminum and its alloys. Ranging from aircraft bodies, vehicles, engine components, ship components, to buildings and very diverse applications using aluminum alloys. Material for making alloy wheels for components in motors using one of the special aluminum alloy applications with regard to the strength and hardness of high-quality aluminum alloys. Industrial companies that make aluminum doors, including windows and frames, make aluminum shelves, storefronts and other products. Produce waste remnants of used aluminum which can be used as aluminum as the main material destination. To reduce the company's production costs, many of them use aluminium scrap as their main casting material. Casting uses a temperature of 650 ° C, 700 ° C, 750 ° C, 800 ° C including casting type evaporative or casting using Styrofoam. The missing styrofoam casting pattern is a casting that uses a pattern of material that can evaporate when exposed to molten metal heat. The casting temperature results can affect microstructure, hardness, porosity and structure.
Utilization of rice husk ash waste and scrap aluminum as composite materials fabricated by evaporative casting Siswanto, Rudi; Subagyo, Rachmat; Tamjidillah, Mastiadi; Mahmud, Mahmud; Setiawan, Sigit Aji
Mechanical Engineering for Society and Industry Vol 4 No 2 (2024)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/mesi.12505

Abstract

To achieve environmental sustainability, the integration of waste materials into new production processes is essential. This study investigates the development of aluminum matrix composites (AMCs) reinforced with rice husk ash (RHA) using the evaporative casting method. This study focuses on the effects of aluminum scrap-RHA composition, casting temperature, and styrofoam pattern thickness on key physical and mechanical properties such as fluidity length, surface roughness, hardness, and porosity. The composite material from aluminum scrap electrical cables and rice husk ash was heated in a furnace at a temperature of 900 °C for 2 hours with a sieve size of 200 mesh. The pattern material is styrofoam from electronic equipment packaging. The molding sand used is local silica sand with a sieve size of 60 mesh. The melting furnace uses a crucible furnace type with used oil as fuel. The independent variables were Al-RHA composition (100:0, 95:5, 90:10) %, pouring temperature (650 °C, 700 °C, and 750 °C), and Styrofoam pattern thickness (1, 2, 3, 4, 5, 6, and 10) mm. The results showed that the pouring temperature and the composition ratio of Al-RHA affected the fluidity length, surface roughness, hardness, and porosity, showcasing the potential of using waste materials in cost-efficient and environmentally sustainable composites for various industries.
Co-Authors Abdul Ghofur Abdul Ghofur Aji, Anas Satria Ali Ridho Anwar Anwar Aqli Mursadin Asep Dhonie Adetya Rachman Diaurahman Diaurahman Dwi Herizen Galih Aprianto H. Midi H. Midi Harunsyah, H Hendra Hadi Saputra Jumalik, Jumalik Komang Aria Kresna Kepakisa Komang Aria Kresna Kepakisan M. Ikhsan Almadani Ma'ruf Ma'ruf Ma'ruf, Ma'ruf Mahmud Mahmud Mastiadi Tamjidillah Mastiadi Tamjidillah Mastiadi Tamjidillah, Mastiadi Ma’ruf Muhammad Irfan Riyadi Muhammad Jurni Muhammad Ramadhan Anshori Putra, Fajar Perdana Rachmat Subagyo Rachmat Subagyo Ramagisandy, Holy Rian Effendi Riyadi, M. Irfan Salmyah, S Sari Hartini Setiawan, Sigit Aji Suryadi Suryadi Syaiful Rahman Yuono, Nanang