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Analisis Kekuatan Mekanis A304 menggunakan Logam Pengisi E308 pada Pengelasan GTAW dengan Variasi Parameter Apang Djafar Shiedieque; Amri Abdulah; Dede Ardi Rajab; Jefri Jafarudin
Jurnal Metal Indonesia Vol 43, No 1 (2021): Metal Indonesia
Publisher : Balai Besar Logam dan Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32423/jmi.2021.v43.17-26

AbstrakTeknologi pengelasan adalah metode penyambungan material yang umum digunakan di industri, konstruksi, dan manufaktur. Makalah ini membahas Gas Tungsten Arc Welding (GTAW) menggunakan logam pengisi ER308 untuk menyambung logam dasar A304. Penelitian ini bertujuan untuk menguji kekuatan tarik dan lentur dari bahan dengan variasi tipe v-groove dan arus pengelasan sebagai parameter pengelasan. Jenis sambungan yaitu butt-welds dengan 45° v-groove, 60° v-groove, dan 60 ° double v-grooves, sedangkan arus pengelasan bervariasi antara 75A, 100A dan 125A. Uji kuat tarik menggunakan HUNG TA-520 dengan kapasitas mesin 500 kN. Hasil kekuatan puncak masing-masing capaian berada pada 645,70 N / mm2, 633,16 N / mm2, dan 613,89 N / mm2. Kemudian pada hasil uji tekuk retakan terbesar pada sampel terjadi pada arus 75A. Dari hasil ini lebih baik menggunakan arus 100A. AbstractWelding technology is a method of joining materials commonly used in industry, construction, and manufacturing. This paper discusses Gas Tungsten Arc Welding (GTAW) using ER308 filler metal to join the A304 base metal. This study aims to examine the strength and bending test of the variation of the v-groove type and welding current as welding parameters. Types of joints are butt-welds with 45 ° v-grooves, 60 ° v-grooves, and 60 ° double v-grooves, while the welding current varies between 75A, 100A, and 125A. Tensile strength test using HUNG TA-520 with an engine capacity of 500 kN. The peak strength results of each achievement are at 645.70 N / mm2, 633.16 N / mm2, and 613.89 N / mm2. Then the bending test results, the largest cracks in the sample, occurred at a current of 75A. From these results it is better to use a current of 100A.

Perancangan Mesin Auto Spray untuk Cleaning Candle Filter Amri Abdulah; Apang Djafar Shieddieque; Dede Ardi Rajab; Sukarman Sukarman; Choirul Anwar
Jurnal Metal Indonesia Vol 42, No 2 (2020): Metal Indonesia
Publisher : Balai Besar Logam dan Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32423/jmi.2020.v42.52-62

Penelitian ini membahas perbaikan proses penyemprotan pada tahap pembersihan candle filter di PT XYZ, yaitu permasalahan proses penyemprotan manual pada candle filter yang tidak efisien. Berdasarkan permasalahan tersebut maka perlu dilakukan proses penyemprotan dengan mesin. Penelitian ini membahas tentang perancangan mesin penyemprot otomatis candle filter untuk mengurangi waktu pengerjaan. Mesin ini dirancang untuk berbagai ukuran candle filter, dan mesin dapat membersihkan candle filter dari luar dan dalam secara bersamaan. Hasil perancangan yaitu mesin auto spray memiliki putaran untuk penggerak nosel yaitu 596,1 Rpm dan pemutar candle filter 480 Rpm. Kecepatan putaran dirancang dengan RPM yang dapat disesuaikan dan dikontrol oleh inverter pada panel. Mesin auto spray memiliki konstruksi yang tahan korosi dan kokoh dengan spesifikasi mesin sepanjang 3005 mm x lebar 515 mm x tinggi 1215 mm. Proses penyemprotan menghemat waktu yaitu mencapai 60% yang diperoleh dari perhitungan proses penyemprotan secara manual, dan menggunakan mesin otomatis masing-masing adalah 25 menit 10 menit. Dari segi kualitas, hasil penyemprotan menggunakan mesin juga lebih baik. Dari 40 sampel yang diuji dari setiap proses, nilai rata-rata partikel saat menggunakan mesin, dan secara manual masing-masing adalah 5,36 gram dan 23,6 gram.

Optimization of Tensile-Shear Strength in the Dissimilar Joint of Zn-Coated Steel and Low Carbon Steel Sukarman Sukarman; Amri Abdulah; Jatira Jatira; Dede Ardi Rajab; Rohman Rohman; Choirul Anwar; Yulfian Aminanda; Muhammad Ali Akbar
Automotive Experiences Vol. 3 No. 3 (2020)
Publisher : Universitas Muhammadiyah Magelang

The present study features analytical and experimental results of optimizing resistance spot welding performed using a pneumatic force system (PFS). The optimization was performed to join SECC-AF (JIS G 3313) galvanized steel material with SPCC-SD low carbon steel. The SECC-AF is an SPCC-SD (JIS G 3141) sheet plate coated with zinc (Zn) with a thickness of about 2.5 microns. The zinc coating on the metal surface causes its weldability to decrease. This study aims to obtain the highest tensile-shear strength test results from the combination of the specified resistance spot welding parameters. The research method used the Taguchi method using four variables and a combination of experimental levels. The experimental levels are 2-levels for the first parameter and 3-levels for other parameters. The Taguchi optimization experimental results achieved the highest tensile-shear strength at 5049.64 N. It properly worked at 22 squeeze time cycles, 25 kA of welding current, and 0.6-second welding time and 12 holding-time cycles. The S/N ratio analysis found that the welding current had the most significant effect, followed by welding time, squeeze time, and holding time. The delta S/N ratio values were 1.05, 0.67, 0.57 and 0.29, respectively.

Analisis Keretakan pada Sambungan Las antara Pipa ASTM A106 dengan Globe Valve Amri Abdulah; Apang Djafar Shieddique; Jatira Jatira; Dede Ardi Rajab; Sukarman Sukarman
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa & Inovasi Volume 3 Nomor 2 Tahun 2021
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v3i2.2150

Crack failure often occurs in piping installations, especially in the welding area which can be caused by excessive stress or corrosion of the material. In this case, the crack failure in the HAZ area will be discussed near the pipe connected to the valve for the heat transfer fluid line. The method used in this paper is the inspection of the attached materials using OES (Optical emission spectroscope), observation of pipe and valve joints and failure analysis. From the results of material inspection, it was found that the pipe used was ASTM A106, then from the microstructure it was seen that the grain dimensions were not homogeneous, it would cause the strength of material heterogeneity, then from visual observation, it could be seen that pipe joints and valve misalignment occurred.

ANALISIS MATERIAL ROLLER CVT RACING UNTUK PENINGKATAN PERFORMA SEPEDA MOTOR HONDA BEAT 110CC Agung Maulana Rahmat; Dede Ardi Rajab; Nefli Yusuf; Amri Abdulah
Jurnal Teknologika Vol 12 No 2 (2022): Jurnal Teknologika
Publisher : Sekolah Tinggi Teknologi Wastukancana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51132/teknologika.v12iNo 2.195

Abstrack In the industry, most do not use pure aluminum material, but utilize material absorption. An alloy that is often used in the foundry industry is Al-Si. The smelting process using a tool made of refractory stone as a heat insulator is able to increase the heat in the combustion chamber to 1,000 °C, the melted metal material must be at a melting point below 1,000 °C, such as aluminum, brass, lead and so on,. Roller is one of the components contained in the automatic transmission or CVT. Roller bar functions to press against the inner wall of the primary pulley during high rotation. This racing roller is a roller that is usually used to improve the performance of an automatic motorcycle. Rollers are heavy force balance bearings that are useful for pressing the inner walls of the primary pulley during high revolutions. Based on the results of the discussion in this study that the hardness value at three different points and has been carried out as much as 3 times for one test material, namely the Standard Roller, that data 1 average hardness price of 86 with an average penetration depth of 0.12 mm, for data 2 the average hardness price of 93 with an average penetration depth of 0.28 mm. Keywords : Material, Roller, and Hardness Tester.

Optimization of Heat Transfer Performance Using Response Surface Methodology-Central Composite Design (RSM-CCD) for Nano-Coolant (Al2O3+EG/W) in Electric Vehicle Battery Amri Abdulah; Dede Ardi Rajab; Iman Nurshahid; Sukarman; Khoirudin; Muhamad Taufik Ulhakim
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa dan Inovasi Volume 6 Nomor 1 Tahun 2024
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v6i1.5455

The presence of electric vehicles (EVs) must be supported by batteries that have good-quality energy storage. Battery power is critical to the development of electric cars. Temperature affects battery strength, so operating within the optimum temperature range must be ensured. During the charge and discharge processes, the electrochemical reaction generates hot energy, causing an increase in battery temperature. In this research, the solution to the problem is to make a cooling system with a mini channel cold plate and Al2O3 1%vol+EG/W (50:50) nano coolant. Optimization of heat transfer enhancement using Response Surface Methodology-Central Composite Design (RSM-CCD) and experimental tests with various flow rate variations. The research findings revealed that the RSM-CCD results and the outcomes of studies employing test equipment agreed that the highest cooling fluid flow rate was the most optimal condition, the highest T2 temperature drop of 17.63% occurred at a flow rate of 1.7 LPM, and the lowest T2 temperature was 13.13% at a flow rate of 1 LPM.

Development of hybrid nanofluids and solar heat exchangers (SHX) to improve heat transfer performance in solar panel cooling Amri Abdulah; Apang Djafar Shieddieque; Dede Ardi Rajab; Khoirudin Khoirudin; Sukarman Sukarman
Mechanical Engineering for Society and Industry Vol 5 No 1 (2025)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/mesi.12913

This study examined the thermohydraulic efficiency of a novel Solar Heat Exchanger (SHX) designed for cooling solar panels. The SHX was specifically created for 20 Wp solar panels measuring 450 × 350 mm. The cooling medium was a hybrid nanofluid (HNF) consisting of Al₂O₃ and SiO₂ nanoparticles (0.5–1%) suspended in a base fluid of ethylene glycol and water (EG/W) at a 10:90 ratio. Experiments were performed using flow rates ranging from 1 to 3 LPM. The HNF coolant demonstrated enhanced performance in the solar heat exchanger, with a maximum heat transfer rate increase of 56.07% compared with that of the base fluid. This improvement in the heat-transfer rate was associated with an increase in the heat-transfer coefficient, which was influenced by the flow rate and volume fraction of the HNF. The effectiveness of the HNF surpassed that of the base fluids by approximately 117%. The results indicated that higher flow rates and volume fractions improved cooling performance. The enhanced cooling efficiency and innovative SHX design make this study particularly relevant to the development of solar panel cooling systems, particularly those employing hybrid nanofluid coolants.

Analisis Keretakan pada Sambungan Las antara Pipa ASTM A106 dengan Globe Valve Amri Abdulah; Apang Djafar Shieddique; Jatira Jatira; Dede Ardi Rajab; Sukarman Sukarman
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Volume 3 Nomor 2 Tahun 2021
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v3i2.2150

Crack failure often occurs in piping installations, especially in the welding area which can be caused by excessive stress or corrosion of the material. In this case, the crack failure in the HAZ area will be discussed near the pipe connected to the valve for the heat transfer fluid line. The method used in this paper is the inspection of the attached materials using OES (Optical emission spectroscope), observation of pipe and valve joints and failure analysis. From the results of material inspection, it was found that the pipe used was ASTM A106, then from the microstructure it was seen that the grain dimensions were not homogeneous, it would cause the strength of material heterogeneity, then from visual observation, it could be seen that pipe joints and valve misalignment occurred.

Optimization of Heat Transfer Performance Using Response Surface Methodology-Central Composite Design (RSM-CCD) for Nano-Coolant (Al2O3+EG/W) in Electric Vehicle Battery Amri Abdulah; Dede Ardi Rajab; Iman Nurshahid; Sukarman; Khoirudin; Muhamad Taufik Ulhakim
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Volume 6 Nomor 1 Tahun 2024
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v6i1.5455

The presence of electric vehicles (EVs) must be supported by batteries that have good-quality energy storage. Battery power is critical to the development of electric cars. Temperature affects battery strength, so operating within the optimum temperature range must be ensured. During the charge and discharge processes, the electrochemical reaction generates hot energy, causing an increase in battery temperature. In this research, the solution to the problem is to make a cooling system with a mini channel cold plate and Al2O3 1%vol+EG/W (50:50) nano coolant. Optimization of heat transfer enhancement using Response Surface Methodology-Central Composite Design (RSM-CCD) and experimental tests with various flow rate variations. The research findings revealed that the RSM-CCD results and the outcomes of studies employing test equipment agreed that the highest cooling fluid flow rate was the most optimal condition, the highest T2 temperature drop of 17.63% occurred at a flow rate of 1.7 LPM, and the lowest T2 temperature was 13.13% at a flow rate of 1 LPM.

Optimasi Cairan Pendingin Fluida Nano (SiO2+EG/W) Menggunakan RSM-CCD Pada Pendingin Panel Surya Dede Ardi Rajab; Amri Abdullah; Ina Afriani; Sukarman Sukarman; Khoirudin Khoirudin; Muhamad Taufik Ulhakim; Roy Waluyo
AME (Aplikasi Mekanika dan Energi): Jurnal Ilmiah Teknik Mesin Vol. 9 No. 2 (2023)
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/ame.v9i2.360

Intensitas radiasi matahari dan suhu udara di sekitar berpengaruh pada tegangan dan arus yang dihasilkan oleh sel surya. Semakin rendah intensitas penyinaran matahari, semakin rendah pula arus dan tegangan yang dihasilkan. Tegangan yang dihasilkan menurun seiring dengan kenaikan suhu. Kondisi ini memerlukan suatu alat yang dapat mengatur keadaan suhu pada panel surya. Penelitian ini dilakukan untuk mengatasi permasalahan panas pada panel surya melalui optimasi sifat termal fluida pendingin dengan menambahkan partikel SiO2 berukuran nano ke cairan dasar W/EG, yang umum disebut fluida nano (Nanofluids). Pembuatan desain serpentine channel sebagai alat penukar kalor juga turut dilakukan. Proses optimasi perpindahan panas dilakukan menggunakan Respon Surface Metodology-Central Composite Design (RSM-CCD), lalu proses uji eksperimental dilakukan dengan variasi laju alir 1 - 3 LPM dan suhu masuk dijaga pada 35oC. Hasil penelitian menunjukkan kesesuaian antara hasil RSM-CCD dan hasil percobaan dengan alat uji, dimana laju alir fluida pendingin tertinggi merupakan kondisi yang paling optimum. Penurunan suhu T2 masing-masing sebesar 12,568oC pada laju alir 3 LPM, 11,286oC pada laju alir 2 LPM dan 11oC pada laju alir 1 LPM. Dari uji coba selama 13 menit pada masing-masing laju alir dengan suhu masuk dijaga 35oC diperoleh hasil bahwa terjadi peningkatan ΔTavg sebesar 28,62%. Kata kunci: fluida nano; panel surya; RSM-CCD; serpentine channel; SiO2.

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