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All Journal Jurnal Pendidikan Teknologi dan Kejuruan JTEV (Jurnal Teknik Elektro dan Vokasional Jurnal Rekayasa Mesin Jurnal Pendidikan Teknik Mesin Rang Teknik Journal Jurnal Sains dan Teknologi: Jurnal Keilmuan dan Aplikasi Teknologi Industri JURNAL PENDIDIKAN TAMBUSAI EDUKATIF : JURNAL ILMU PENDIDIKAN Jurnal Teknologi Informasi dan Pendidikan MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Jurnal Abdidas PAKAR Pendidikan Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat Teknomekanik ARSY : Jurnal Aplikasi Riset kepada Masyarakat Jurnal Vokasi Mekanika Formosa Journal of Applied Sciences (FJAS) MASALIQ: Jurnal Pendidikan dan Sains CONSEN: Indonesian Journal of Community Services and Engagement Jurnal Aplikasi IPTEK Indonesia Journal of Engineering Researcher and Lecturer Jurnal Dehasen Mengabdi J-CoSE: Journal of Community Service & Empowerment

Bulkia Rahim

Universitas Negeri Padang

Author-ID : 1316266

Religion Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Library & Information Science Mathematics Mechanical Engineering Physics Public Health Social Sciences Other

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Title

The Effect of AC (alternating current) and DC (direct current) on Bend Testing Results of Low Carbon Steel Welding Joints Firmanda, Zetri; Aziz, Abdul; Rahim, Bulkia
Teknomekanik Vol. 3 No. 2 (2020): Regular Issue
Publisher : Universitas Negeri Padang

The purpose of this study was to determine the effect of alternating current (AC) and direct current (DC) on the bend testing results of low carbon steel welding joints. The results of this study are expected to determine the cracks that occur from the root bend and face bend testings in the AC and DC welding process. This study used experimental method, where the research was done by giving AC and direct polarity DC (DC-) SMAW welding treatments. The material used in this research was low carbon steel plate DIN 17100 Grade ST 44, thickness 10 with E7016 electrode type. The process of welding joints used a single V seam, strong current of 90A, and the welding position of 1G. The testing of welding joints was carried out by bend testing using the standard acceptance of AWS D1.1 root bend and face bend testing results. The results of the bend testing showed that the AC welding root bend test specimen held no cracks while the DC welding root bend test held cracks with incompelete penetration and open crack defects. On the contrary, the AC welding face bend test had open crack defects and in the DC welding face bend test was found a crack. Thus, there was a difference in the crack resistance of the welding joint from the types of current used through the root bend test and face bend test. Therefore, it can be summarized that AC welding is better for root welding and DC welding is good for capping welding.

Optimization of CNC Turning Parameters Using Taguchi Method Rifelino, Rifelino; Rahim, Bulkia; Indrawan, Eko
Teknomekanik Vol. 4 No. 1 (2021): Regular Issue
Publisher : Universitas Negeri Padang

The surface roughness quality of machining product plays important role when it contacted with other machine components. That quality depends on several parameters setting, such as material, cutting tool, cutting condition and operator skill. The aim of this study is to obtain the optimum setting of turning parameters by using Taguchi method. Three control factors: cutting speed, depth of cut, and feeding at three different levels are selected. A series CNC turning process on AISI 1045 material were performed using L9 (3)3 orthogonal array with cutting fluid. Insert carbide cutting tool is used in the experiment. In order to reveal the optimum machining parameter, smaller the better is quality characteristic selected for surface roughness examination of workpiece. Analysis of experiment results revealed that higher cutting speed, low feed, low depth of cut respectively, provides fine surface quality of machined workpiece. Moreover, feed f parameter was found most influence to the surface rougness quality with 53.73% contribution, cutting speed v provides 23.28% contribution, and depth of cut a provides 17.87% contribution. Confirmation experiment shows that level 3 of cutting speed, level 2 of cutting depth, and level 1 of feed deliver smoothest machined surface of Ra 0,46 µm.

Comparison of variation in the building shapes and the window-to-wall ratio by concerning energy consumption for thermal comfort and lighting Kurniawan, Andre; Lapisa, Remon; Setiawan, Muhammad Yasep; Rahim, Bulkia; Syahri, Budi
Teknomekanik Vol. 6 No. 2 (2023): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/teknomekanik.v6i2.27972

Currently, an influential factor contributing to thermal comfort home design is the incorporation of energy-efficient passive design principles. It is exemplified by strategic window placement, the utilization of thermally efficient materials, and effective insulation. It exerts a substantial influence on thermal comfort and electrical consumption. This paper examines the effect of building shape and window-to-wall ratio (WWR) on thermal comfort and lighting energy consumption in residential houses in tropical climates. The lighting electricity and the adaptive thermal discomfort hours of 30 different models of houses were obtained using OpenStudio and EnergyPlus simulation software. The models were developed for three building shapes (square, rectangle, and L-shaped), and each model was varied in five models of window-to-wall ratios. Results indicate that the square-shaped model with a WWR of 10% will provide the lowest energy consumption in thermal comfort had 420.45 kWh/m2. On the other side, the lowest energy consumption in lighting is the square-shaped model with a WWR of 50% had 507.95 kWh/m2. Thus, the recommendation is to use the square-shaped house that represents the most efficient air conditioning system while the other WWR set also produce the most natural luminaire. It is because the percentage of WWR increased will result in more energy consumption in air cooling but slightly lower energy consumption in lighting. However, when considering aesthetics and freshness, the WWR of the 50% model will offer a better deal.

Co-Authors - Primawati A, Yufrizal Abd Aziz Abdul Aziz Abdullah, MT, Dr. Rijal Addinul Muhammad Akram Ramadhan Al Afif Attorik Alfadila , Aziza Amanda, Rezi Ambiyar, Ambiyar Ammy, Rahmad Isrok Andre Kurniawan Andriani , Cici Angelique, Aisyah Farahin Anggi Agni Zaus Anggreini, Octaviani Arafat, Andril Arfianti, Fina Arief Wicaksono Armensyah, Rafi Arwizet Arwizet, Arwizet Az-zahira, Ghea Bima Aditia Rahman Budi Syahri Cici Andriani Cintia Gusti Ansary Cristin, Cristin Delima Yanti Sari Dodi Ariska Dori Yuvenda Dwi Danendra, Rayhan Efendi, Mardion Eko Indrawan Erika Afandi Erizon, Nelvi Eylidarson, Fauzan Bin Fajrin, M fatur Rahman, fatur Febri Prasetya Ferdi Syaputra S Fiki Efendi Firmanda, Zetri Fitra Yuda Rahman Gusta Nanda Hadysyah, Muhammad Thoriqul Hafifurrezy, M. Hafizil Haq Hendri Nurdin Illahi, Ridho Indrawan , Eko Intan Zulian Apri Irsyad Chalid Irzal Irzal Irzal Irzal Irzal, Irzal Islami, Fauzana Ivan Framana Jasman Jasman Jasman Jasman Jasman Jefri Al Ghairi Junil Adri Kahfi, Fadlan Muhammad Kifli Alfikri Lusi Vidia Putri M Fajrin M. Yasep Setiawan Makobul Pasaribu Makruf, Zulhan Insan Malika Afifah Keysha Mardi, Feldia Mardiana, Yuspita Mertiza Fitri Muliani Miftahrur Bin Afan Mochammad Imron Awalludin Muhammad Aulia Ifsan Muhammad Lathif Mahendra Muhammad Ravi Muhammad Zikri Mulianti Mushil, Novando Mustika Sari, Dian Nabila Tasrif Nelvi Erizon Nikolas Verdian Guci Nizwardi Jalinus Nizwardi Jalius Nofri Helmi Nurdin Hendri Paderma, Deri Syafamukmin Peri Irawan Pramudya, Aldhi Pranesha, Ratna Pratama, Ayu Zulmi Amanda Pratama, Raymon Primawati , Primawati Primawati Primawati Primawati Primawati, Primawati Purnama Putra, Randi purwantono purwantono Purwantono Purwantono Purwantono, Purwantono Putra, Rahmat Mardiansyah Putra, Randi Purnama Putri Rahmadi Zaki Rahmat Hidayat Ramadhan, Fanny Fadillah Refdinal , Refdinal Refdinal Refdinal Remon Lapisa Remon Lapisa Remon Lapisa Reza Nurrahmi Putri Ridwan Ridwan Rifaldo Novembli Rifelino Rifelino Rizky Ema Wulansari Rizky Ema Wulansari Rodesri Mulyadi Sama Dortina Hutabarat, Ruth Septriani, Tesa Shiddiq, Abdul Rahim Sigalingging, Elsen Agustina Simatupang , Chris Vania Estherina Suparno Suparno Suparno Suparno Syaflan Sandi Harta Putra Syaflan Sandi Harta Putra Syaputra, Afzan Syaryani, Riska Nava Tasrif , Nabila Trisna Juwita, Dinda Ulfi Anggraini Usmeldi Usmeldi Vikri Resvi Pratama Wakhinuddin Wakhinuddin Wanda Afnison Wardhana, Bayu Setya Waskito Waskito, Waskito Wella Yanmita Syahri Wulansari, Rizky Ema Yola Lestari, Dian Yufrizal Yufrizal Yuke Permata Lisna Yulira Emputri Zainal Abadi Zaus, Anggi Agni

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