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All Journal Jurnal Taman Vokasi Abdimas Dewantara at-tamkin: Jurnal Pengabdian kepada Masyarakat Riau Journal of Empowerment Jurnal Teknik Mesin Indonesia Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi STEAM Engineering : Journal of Science, Technology, Education And Mechanical Engineering G-Tech : Jurnal Teknologi Terapan Jurnal Pendidikan Teknik Mesin Undiksha Community Development Journal: Jurnal Pengabdian Masyarakat Indonesian Community Journal Journal of Mechanical and Electrical Technology Aceh International Journal of Science and Technology
Ahmad Saepuddin
Universitas Negeri Surabaya
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Other

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ST41 Tensile Strength Analysis of Spiral Groove Welding with Three Current Variations Rohman, Mojibur; Saepuddin, Ahmad; Fardana, Mochamad Adhi
Jurnal Pendidikan Teknik Mesin Undiksha Vol. 8 No. 2 (2020)
Publisher : UNIVERSITAS PENDIDIKAN GANESHA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jptm.v8i2.27590

Abstract

Welding is one of the important aspects in the process of joining metal, iron or steel. This study aims to determine the effect of SMAW welding techniques in spiral grooves with variations in currents of 100 Amperes, 110 Amperes and 120 Amperes to the tensile strength of St 41 steel. This research is an experimental study conducted in two places namely BLKI Singosari, Malang and Faculty of Engineering, ITN Malang, East Java. The results showed that the current strength and electrode flow in welding have an influence on the tensile strength even though the results are not significant. Average tensile strength at 100 Amperes current is 46.75 Kgf / mm², at 110 Amperes current is 44.87 Kgf / mm², and at 120 Amperes current is 43.80 Kgf / mm². The results of this test indicate that the variation of the current in SMAW welding with the spiral groove method influences the tensile strength of St 41 steel. Based on the findings in this study it can be concluded that the highest tensile strength value of 46.75 Kgf / mm² occurs in welding spiral grooves with strong currents of 100 Ampere. Keywords : SMAW welding; spiral groove, strong current, tensile strength; ST41.ReferencesAnwar, B. (2017). Analisis kekuatan tarik hasil pengelasan posisi bawah tangan dengan perbedaan variasi kuat arus listrik pada baja st 42. Teknologi, 16 (1), 18-24.Budiman, H. (2016). Analisis pengujian tarik (tensile test) pada baja st37 dengan alat bantu ukur load cell teknik mesin. J-Ensitec, 3(1), 9-13.Daryanto. (2012). Teknik Las. Bandung: AlfabetaGunawan, Y. Endriatno, N. Anggara, B, H. (2017). Analisa pengaruh pengelasan listrik terhadap sifat mekanik baja karbon rendah dan baja karbon tinggi. Enthalpy Jurnal Ilmiah Mahasiswa Teknik Mesin, 2(1), 2502-8944.Imam, P, M. dan Sarjito, J, S. (2012). Analisis kekuatan sambungan las smaw (shielded metal arc welding) pada marine plate st 42 akibat faktor cacat porositas dan incomplete penetration. KAPAL, 5(2), 102-113.Kolo, J.M., Nugraha, I.N.P. & Widayana, G. (2017). Pengaruh variasi arus terhadap kekuatan impact dan kekerasan material st 37 menggunakan proses pengelasn gas tungsten arc welding (GTAW). Jurnal Pendidikan Teknik Mesin Undiksha, 8(2), 1-10.Kurniawan, S, A., Solichin & Puspitasari, P. (2014). Analisis kekuatan tarik dan struktur mikro pada baja st.41 akibat perbedaan ayunan elektroda pengelasan SMAW. Jurnal Teknik Mesin, 22(2), 1-12.Mohruni, A, S. dan Kembaren, B, H. (2013). Pengaruh variasi kecepatan dan kua arus terhadap kekerasan, tegangan tarik, strukturmikro baja karbon rendah dengan elektroda e6013. Jurnal Rekayasa Mesin, 13(1), 1-8.Pranawan, D, F, B. dan Suwito, D. (2016). Pengaruh teknik pengelasan alur spiral, alur zig – zag, dan lurus pada arus 85 a terhadap kekuatan tarik baja st 41. Jurnal Teknik Mesin. 4(2), 29 – 32.Siswanto & Amri, S. (2011). Konsep dasar teknik las. Edisi 1. Jakarta : PT. Prestasi Pustakaraya.Weman, K. (2003). Welding processes handbook. Woodhead Publishing Limited, Cambride.Widharto, S. (1996). Petunjuk kerja las. Jakarta: Pradnya ParamitaWiryosumarto. 2000. Teknologi pengelasan logam. Jakarta: PT. Pradnya Paramita.
Effect of Angle of Attack on Drag and Lift Coefficients on Naca Airfoil for Wind Turbine Application Adiwibowo, Priyo Heru; Purwanto, Aris; Rasyid, Akhmad Hafizh Ainur; Saepuddin, Ahmad
Aceh International Journal of Science and Technology Vol 14, No 2 (2025): August 2025
Publisher : Graduate School of Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.14.2.47327

Abstract

The development of renewable energy is expected not only to reduce dependence on fossil fuels but also to support the transition toward cleaner and more sustainable energy systems in the future. The combustion of fossil fuels significantly contributes to greenhouse gas emissions, thereby accelerating global climate change. Recognizing these limitations and negative environmental impacts, researchers and energy experts have begun to explore and develop various alternative energy sources that are more environmentally friendly and sustainable. Among them, wind energy is one of the most promising and widely available clean energy resources. The efficiency of wind turbines can be enhanced by optimizing the aerodynamic characteristics of their blades. This study examines the aerodynamic properties of three distinct NACA airfoil profiles: NACA 0012, NACA 2412, and NACA 3412. These profiles differ in camber magnitude and distribution, yet they share a maximum thickness of 12% of the chord length. Computational Fluid Dynamics (CFD) simulations were conducted using ANSYS Fluent with angles of attack ranging from -20 to 20. The results reveal that the NACA 2412 airfoil demonstrates the best aerodynamic performance at an angle of attack of 5, achieving the highest lift-to-drag ratio (L/D).
Co-Authors -, Masykur A. Grummy Wailanduw Abd Wahab Abd Wahab Agus Dwi Putra Agus Dwi Putra Ahmad Zainul Safitri Aisyah Endah Palupi Alfi Fadliana Anggraeni Hadi Pratiwi Aris Ansori Astrid Ika Paramitha Bella Cornelia Tjiptady Bella Cornelia Tjiptady Candra Pradhana Choirina, Priska Chuzaimatul Fitriyah Dewi Izzatus Tsamroh Dwi Nirnia Ari Cahyani Fardana, Mochamad Adhi Fitriani, Indah Martha Fitriani, Indah Martha Hidayatullah, Rachmad Syarifudin I Made Arsana Ika Nurjannah, Ika Indah Martha Fitriani Indra Herlamba Siregar Irfa’i, Mochamad Arif Luchyto Chandra Permadi Permadi M Dafid M Rizki Chanda Mochamad Sulaiman Mochammad Sulaiman Mojibur Muhaji Muhaji Muhammad Ishak Muhammad Rizal Akbar Zamzami Novi Sukma Drastiawati Permadi, Luchyto Chandra Priyo Heru Adiwibowo Rahman, Rifki Zainur Rasyid, Akhmad Hafizh Ainur Ratna Fajarwati Meditama Ratna Fajarwati Meditama Rohman, Mojibur Sari, Handini Novita Talifatim Machfuroh Wahyu Dwi Kurniawan Yayi Febdia Pradani Yunitasari, Bellina Zainal Abidin Zainal Abidin Zakiyya, Hanna