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All Journal Penelitian Pendidikan Journal of Mechanical Engineering Education (Jurnal Pendidikan Teknik Mesin) INVOTEK: Jurnal Inovasi Vokasional dan Teknologi Martabe : Jurnal Pengabdian Kepada Masyarakat JURNAL PENDIDIKAN TAMBUSAI Community Engagement and Emergence Journal (CEEJ) MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Asatiza: Jurnal Pendidikan Teknomekanik Vocational : Jurnal Inovasi Pendidikan Kejuruan Jurnal Vokasi Mekanika MASALIQ: Jurnal Pendidikan dan Sains CONSEN: Indonesian Journal of Community Services and Engagement Al-DYAS : Jurnal Inovasi dan Pengabdian kepada Masyarakat Journal of Engineering Researcher and Lecturer Jurnal El-Hadhary: Jurnal Penelitian Pendidikan Multidisiplin Journal of Innovative and Creativity Indonesian Journal of Innovation Science and Knowledge Innovation in Engineering Edumaspul: Jurnal Pendidikan
Rifelino Rifelino
Universitas Negeri Padang
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Mechanical Engineering Physics Social Sciences Transportation Other

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Pengaruh Variasi Jarak Pitch pada Turbin Screw Portabel terhadap Torsi yang Dihasilkan Menggunakan Computational Fluid Dynamics Ahmad Shafwan Hadi; Wanda Afnison; Waskito Waskito; Rifelino Rifelino
Journal of Innovative and Creativity Vol. 5 No. 3 (2025)
Publisher : Fakultas Ilmu Pendidikan Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/joecy.v5i3.4406

Abstract

Kinerja turbin screw portabel sangat dipengaruhi oleh parameter geometris, namun penelitian sebelumnya lebih banyak berfokus pada variasi jumlah blade dan sudut kemiringan tanpa mengeksplorasi pengaruh jarak pitch secara mendalam, khususnya untuk aplikasi turbin portabel. Penelitian ini mengkaji pengaruh variasi jarak pitch terhadap torsi yang dihasilkan turbin screw portabel menggunakan simulasi Computational Fluid Dynamics (CFD). Tujuan penelitian adalah menentukan konfigurasi jarak pitch optimal untuk memaksimalkan torsi pada sudut kemiringan 45° dengan konfigurasi 1 blade. Model CFD tiga dimensi dianalisis dengan variasi jarak pitch 60 mm, 90 mm, dan 120 mm pada kecepatan aliran air konstan 1 m/s. Hasil simulasi menunjukkan bahwa jarak pitch berpengaruh signifikan terhadap torsi yang dihasilkan, dengan nilai torsi tertinggi sebesar 0,351 Nm pada pitch 60 mm, kemudian menurun menjadi 0,332 Nm pada pitch 90 mm, dan 0,308 Nm pada pitch 120 mm. Disimpulkan bahwa konfigurasi dengan jarak pitch terpendek (60 mm) menghasilkan torsi tertinggi, menjadikannya desain paling efektif untuk aplikasi hidroelektrik portabel pada kondisi aliran rendah. Temuan ini melengkapi kajian optimasi desain turbin screw portabel dan berkontribusi pada pengembangan sistem energi terbarukan skala kecil yang efisien.
Analisis Elemen Hingga Terhadap Ekspansi Termal dan Distribusi Tegangan Pada Alat Uji Konduktivitas Termal Fretina Sari; Yolli Fernanda; Arwizet K; Rifelino Rifelino
Journal of Innovative and Creativity Vol. 5 No. 3 (2025)
Publisher : Fakultas Ilmu Pendidikan Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/joecy.v5i3.4508

Abstract

Penelitian ini bertujuan untuk menganalisis ekspansi termal dan distribusi tegangan pada alat uji konduktivitas termal tipe Comparative Cut-Bar Method menggunakan pendekatan Finite Element Method (FEM) melalui perangkat lunak ANSYS R2 2025. Analisis dilakukan untuk mengetahui pengaruh temperatur kerja dan beban mekanik terhadap kestabilan komponen utama alat sebelum tahap pembuatan prototipe. Geometri alat dirancang dengan komponen utama berupa heat source, meter bar, spesimen, heat sink, isolator, dan shell, dengan kondisi pembebanan termal pada suhu 200°C dan tekanan mekanis penjepit sebesar 0,1 MPa. Hasil simulasi menunjukkan bahwa distribusi temperatur menyebar secara aksial dari heat source menuju heat sink dengan suhu tertinggi sebesar 202,1°C. Nilai deformasi maksimum sebesar 0,0040569 mm terjadi pada spesimen kuningan, sedangkan deformasi terkecil terdapat pada heat sink sebesar 0,00000019885 mm. Nilai tegangan ekuivalen tertinggi sebesar 241,18 MPa terjadi pada heat source dengan yield strength 305 MPa, menghasilkan safety factor 1,26. Nilai ini menunjukkan bahwa seluruh komponen masih berada dalam batas elastis material dan aman terhadap deformasi plastis. Secara keseluruhan, alat uji konduktivitas termal hasil perancangan menunjukkan performa struktural yang baik dan stabil terhadap pengaruh temperatur kerja maupun beban mekanik. Hasil penelitian ini dapat dijadikan dasar dalam proses optimasi desain serta pembuatan prototipe fisik alat uji konduktivitas termal berbasis metode Comparative Cut-Bar.
WORKSHOP TEKNOLOGI 3D PRINTING BAGI GURU KEJURUAN DI SMK NEGERI 1 BATIPUH Rifelino Rifelino; Eko Indrawan; Zainal Abadi
Martabe : Jurnal Pengabdian Kepada Masyarakat Vol 5, No 4 (2022): Martabe : Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Muhammadiyah Tapanuli Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31604/jpm.v5i4.1560-1566

Abstract

Additive Manufacturing adalah salah satu teknologi yang sedang berkembang untuk membuat produk-produk prototipe dengan memanfaatkan badan aditif tertentu. Fused Deposition Modelling merupakan jenis mesin 3D printing yang populer dengan menggunakan filamen PLA (polylactid acid) atau ABS (acrylonitrile butadiene styrene) sebagai bahan tambahan untuk membuat objek dalam bentuk 3 dimensi. Teknologi ini sangat berguna dalam membuat media pembelajaran purwarupa bagi siswa di sekolah kejuruan. Workshop pengenalan teknologi ini serta prosedur operasionalnya diperkenalkan kepada bagi guru-guru kejuruan di SMK Negeri 1 Batipuh, Kabupaten Tanah Datar, Sumatera Barat. Tahapan dimulai dengan desain objek 3 dimensi menggunakan aplikasi CAD (Computer Aided Design), selanjutnya pengaturan parameter cetak pada perangkat lunak slicer CURA dan finalisasi proses cetak pada mesin 3D printing. Hasil cetak berupa prototype kombinasi roda gigi dan objek label nama sekolah dihasilkan pada sesi akhir pelatihan. Dengan prosedur yang tepat dan kombinasi kreatifitas desain objek, alat ini mampu memberikan alternatif solusi dalam menciptakan media-media pembelajaran purwarupa bagi guru dan siswa di sekolah.
Static analysis of boiler feed pump shaft in steam power plants: Enhancing durability and operational efficiency Muhammad Athar Altarisi; Rifelino Rifelino; Delima Yanti Sari; Wanda Afnison
Innovation in Engineering Vol. 1 No. 2 (2024): Regular Issue
Publisher : Researcher and Lecturer Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58712/ie.v1i2.8

Abstract

Centrifugal pumps are commonly used in industrial and domestic sectors to transport fluids by increasing their flow rate to a specific pressure. One type of centrifugal pump, the Boiler Feed Pump (BFP), plays a crucial role in steam power plants. Designed for continuous operation, BFP shafts are prone to wear and failure due to extreme operational conditions. This study employs computer-aided simulation using SolidWorks software to analyze von Mises stress, displacement, strain, and safety factors of BFP shafts with three material variations: AISI 4140, AISI 316, and AISI 304. The results indicate that AISI 4140 material exhibits the highest safety factor of 2.7 and the lowest displacement of 0.453 mm. Fatigue simulation also shows that AISI 4140 has the lowest damage percentage and the highest fatigue life. These findings suggest that AISI 4140 is the optimal material choice to enhance the durability and efficiency of shafts in applications requiring high reliability, such as BFPs in steam power plants.
Exploring how 3D printing parameters affect the flexural strength of ABS materials Diki Anggara; Rifelino Rifelino; Zainal Abadi; Andril Arafat
Innovation in Engineering Vol. 1 No. 2 (2024): Regular Issue
Publisher : Researcher and Lecturer Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58712/ie.v1i2.16

Abstract

This research focuses on testing the flexural strength of Acrylonitrile Butadiene Styrene (ABS) materials used in 3D printing by the Fused Deposition Modeling (FDM) method. The objective of this study was to evaluate the mechanical strength of ABS using a full factorial experimental design, applying three main factors such as layer height, infill density and infill pattern. Flexural testing was conducted following ASTM D790 standards. A total of 27 specimens were made by varying the layer height, infill density and infill pattern. The results showed that layer height was the most influential factor on flexural strength, with the highest value of 41.815 Mpa at 0.2 mm layer height, 100% infill density, and line infill pattern. ANOVA analysis supported this conclusion with p values <0.05 for layer height, while infill pattern and infill density showed no significant effect. This study provides guidelines for the use of optimal parameters in ABS-based 3D printing processes.
Numerical Structural Response Analysis of Savonius Wind Turbine Blades with Geometric Variation under Aerodynamic Loads Sudjono, Aldo Alfattah; Sari, Delima Yanti; Syahril, Syahril; Rifelino, Rifelino
invotek Vol 25 No 3 (2025): INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/invotek.v25i3.1327

Abstract

Rising demand for electrical energy has accelerated the development of renewable energy technologies, including wind turbines designed to operate at low wind speeds. The savonius vertical-axis wind turbine is a promising option due to its simple configuration and insensitivity to wind direction. Nevertheless, the structural reliability of its blades is strongly affected by their geometry and the material selected. This study focuses on evaluating the structural response of savonius turbine blades under aerodynamic loading using the finite element analysis (FEA) method. Simulations were carried out in ANSYS Workbench R2 2025, considering geometric variations in blade thickness (1.2 mm, 1.5 mm, and 2 mm), aspect ratio (0.8, 1.0, and 1.3), and arc angle (120°, 150°, and 180°). The blades were modeled using AISI 304 stainless steel. The analysis examined von mises equivalent stress, total deformation, and safety factor. The analysis results show that all geometric variations are structurally safe with a safety factor value of 15. The highest maximum von mises stress of 0.081 MPa occurs at a thickness of 1.2 mm, while the lowest value of 0.017 MPa is obtained at an arc angle of 180°. The maximum deformation of 3.38 × 10⁻³ mm occurred at an arc angle of 150°, while the lowest deformation of 6.77 × 10⁻⁴ mm was obtained at an arc angle of 180°, which indicates the most structurally stable configuration.
3D scanner technology in the reverse engineering of complex mechanical components: A literature review Afferli Seftian; Delima Yanti Sari; Rifelino Rifelino; Zainal Abadi
Journal of Engineering Researcher and Lecturer Vol. 5 No. 1 (2026): Regular Issue
Publisher : Researcher and Lecturer Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58712/jerel.v5i1.213

Abstract

This study addresses the challenges involved in the reverse engineering of complex mechanical components, where conventional manual measurement methods often produce geometric deviations that negatively affect the reliability of advanced engineering analyses. A descriptive literature review was conducted to evaluate the role of 3D scanning technology in overcoming these limitations. The study compares various data acquisition methods, including laser scanning, structured light scanning, and photogrammetry, while also analysing how the level of geometric accuracy influences finite element simulation results and structural analysis outcomes. The review found that 3D scanning significantly improves geometric fidelity compared with traditional techniques, thereby enhancing the validity of numerical simulations. However, the review also identified that the quality of the final model is highly dependent on the selected scanning technology, surface conditions, and advanced reconstruction processes such as point cloud registration and mesh generation. The findings indicate that although 3D scanning offers superior precision, geometric deviations may still occur and influence structural parameters. This study concludes that the integration of 3D scanning into reverse engineering workflows requires systematic validation to ensure not only visual accuracy but also functional reliability in engineering applications. Furthermore, this review highlights a critical research gap, suggesting that future studies should place greater emphasis on the direct correlation between geometric accuracy and engineering simulation outcomes.
Adhesion mechanisms and mechanical performance of single-lap joints in FDM-3D printed: A review Muhamad Qeisya Hanif; Rifelino Rifelino; Febri Prasetya; Zainal Abadi
Journal of Engineering Researcher and Lecturer Vol. 5 No. 1 (2026): Regular Issue
Publisher : Researcher and Lecturer Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58712/jerel.v5i1.214

Abstract

Additive Manufacturing (AM), particularly Fused Deposition Modeling (FDM), has evolved from a rapid prototyping technology into a manufacturing approach for producing functional components across a wide range of industrial sectors. Nevertheless, the limited build volume of FDM systems has encouraged the use of adhesive bonding as a practical method for joining sub-components, with the single-lap joint (SLJ) configuration being among the most widely adopted designs. This review aims to provide an integrated analysis of the relationship between FDM-induced surface morphology, the adhesion mechanisms developed at the bonded interface, and their implications for stress distribution, shear strength, and joint failure modes. The findings indicate that the surface characteristics generated by the FDM process, including layer lines, stair-stepping effects, voids, and porosity, create interfacial conditions that differ fundamentally from those of homogeneous materials. These characteristics also produce a non-linear relationship between surface roughness and joint strength. Process parameters such as printing orientation and layer height were identified as key controlling factors that influence surface topography and adhesive performance. From a mechanical perspective, the eccentric load path inherent in SLJ configurations generates significant shear and peel stress concentrations at the overlap ends. These stress concentrations coincide with structurally weak regions that are intrinsically associated with FDM adherends, making them the primary sites for crack initiation and joint failure. Furthermore, modifications to overlap geometry and tailored adhesive distribution have been recognized as effective strategies for improving stress redistribution and enhancing the load-bearing capacity of the joint. This review highlights that the assessment of adhesive joints in FDM-manufactured components requires an integrated analytical framework that accounts for the coupled interactions among printing process parameters, surface conditions, adhesive properties, and progressive failure modeling. Such an approach is essential for the development of reliable structural joint designs for FDM-based applications.
CFD-based Taguchi optimization of impeller geometry to improve centrifugal fan efficiency Delima Yanti Sari; Bagas Santoso; Hendri Nurdin; Hastuti Hastuti; Rifelino Rifelino; Fitrah Qalbina; Tsung-Liang Wu; Dani Harmanto
Teknomekanik Vol. 9 No. 2 (2026): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/teknomekanik.v9i2.53772

Abstract

Centrifugal fans play a significant role in industrial ventilation systems. Their performance is affected by aerodynamic losses such as flow separation and non-uniform pressure distribution, thereby reducing the overall efficiency. Since design parameters influence the fan efficiency, design parameter optimization becomes one option for addressing this issue. Some optimization methods involve high computational cost and complex procedures. This raises the necessity for a more efficient and systematic optimization procedure. The aim of this study is to propose an integrated approach which involves Computational Fluid Dynamics (CFD) and the Taguchi method to improve the performance of a centrifugal fan. CFD is used to evaluate the performance of different design combinations, while the Taguchi method is used to optimize design parameters. The investigated design parameters are the inlet blade angle (β1), the outlet blade angle (β2), the number of blades (n), and the flow rate (Q). Each of the design factors has three levels, therefore, an L9 orthogonal array was utilized as the design of experiments. Analysis of variance (ANOVA) is used to determine their relative significance. The results show that the optimal combination of design parameters increase the efficiency from 39.79% (the reference) to 63.26%. The CFD simulations for the optimal combination exhibit the improved flow behaviour, which explains the enhanced efficiency. The results show the feasibility of the proposed method for improving the performance of the centrifugal fan.
Analysis Thermal for Disc Brake Using Finite Element Analysis (FEA) Alparis Nico Putra Utama; Wanda Afnison; Delima Yanti sari; Rifelino Rifelino
Jurnal Vokasi Mekanika (VoMek) Vol 7 No 2 (2025): Jurnal Vokasi Mekanika
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v7i2.853

Abstract

Traffic accidents are one of the highest causes of death in Indonesia. One of the factors traffic accidents is caused by vehicles, in this case the braking system. Brakes are a device on a vehicle that functions to reduce the speed by applying friction. The main feature in the braking system is heat dissipation. If the brake overheating, the effectiveness of the braking system will be reduced. In general, there are two types of brakes, but in modern vehicles disc brake more used. In this study, various types of disc brakes will be tested. The designs tested are solid disc brakes, drilled-type disc brakes, and grooved-type disc brakes. The aim of research for determine the most optimal disc brake design. The temperature value on the surface of the disc brake will be measure. The Finite Element Analysis (FEA) method is used in this study. The validation process is carried out by comparing analytical result and Finite Element Analysis result on solid disc brakes. The speed before braking is 60 km / h. Material used on disc brake is grey cast iron. In the simulation process using Finite Element Analysis, the mesh size used is 3 mm and the number of elements is 255,244 elements. After the analysis was carried out, the temperature value in the grooved-type disc brake design was the smallest value than another with a maximum temperature of 143.56 ºC during braking. Thus, based on the results obtained, the grooved-type disc brake tends to be more optimal.
Co-Authors - Primawati A.A. Ketut Agung Cahyawan W Abadi, Zainal Abadi Abdul Aziz Abdullah, MT, Dr. Rijal Addha Ilham Aditya Bernaldo Adlan Azmi Abdullah Afferli Seftian Afriza Media Agung Agung Ahmad Firdaus Ahmad Rifai Sihombing Ahmad Shafwan Hadi Albayhaqi Ichsan Alparis Nico Putra Utama Altarisi, Muhammad Athar Ambiyar, Ambiyar Ananda Jafron Rhionaldo Anang Puji Nugroho Andril Arafat Anggara, Diki Aprianti, Maidinda Arafat, Andri Arafat, Andril Arifin Jannuar Arizal Saputra Arwizet Arwizet, Arwizet Bagas Santoso Bayu Setya Wardhana Berril Habibil Rizka Bima Afrindo Putra Budi Syahri Bulkia Rahim Daffa Aji Pratama Dani Harmanto Delima Yanti Sari Delima Yanti Sari Diki Anggara Dira Nurfaedah Doni Hamdani Doni Kris Saputra Donny Fernandez Dori Yuvenda Dzaky Dzulqa Arijal Eko Indrawan Enjelita Enjelita Erwin Candra Fadhil Naufan Fathur Rahman Fauza, Anna Niska Febri Al Rasyid Febri Prasetya Fitrah Qalbina Fretina Sari Galib Afdi, Alham Harahap, Doa Hastuti Hastuti Hilman, Antoni Ilham Hidayathullah Irzal Irzal Irzal, Irzal Ivan Framana Jasman Julian Berlin Roland Tobing Junil Adri Laksono Trisnantoro Muhamad Julianes Prasetyo Muhamad Qeisya Hanif Muhammad Athar Altarisi Muhammad Ichsan Muhammad Iqbal Tawakal Muhammad Iqbal Tawakal Muhammad Khattami Al Saidhi Muhammad Restu Alhamdi Muhammad Zikri Muharam, Bananda Mulianti Mustaqin, Iqbal Nabawi, Rahmat Azis Nabawi, Rahmat Aziz Nizwardi Jalinus Nofri Helmi Nofri Pratama Putra Nurdin Hendri Nurhasan Syah Nurmahmudi, Nurmahmudi Ogif Pradinata Putra Purwantono Purwantono Purwantono, Purwantono Putra, Randi Purnama Qori Oktober Rahmad Rian Dawab Midik Rahman Febrio Rajul Halim Perdana Ismet Rangga Ligendra Refdinal, Refdinal Refdinal, Refdinal Remon Lapisa Resqy Dwicandra Rhionaldo, Ananda Jafron Ridho Illahi Rifai Adlani, M. Rifaldo Novembli Rika Yunita Rinto Mariadi Rizky Ema Wulansari Rodesri Mulyadi Rozaki Yudha, Hatami Said Fuad Amry Salwa Chairani Sudjono, Aldo Alfattah Syahril Syahril Syahril Syahril Thoha, Adi Try Yudo Margono Tsung-Liang Wu Vickram Reski Andri Wahyudi Wahyudi Wanda Afnison Waskito Waskito Waskito, Waskito Yolli Fernanda Yufrizal A Yufrizal Yufrizal Yufrizal Yufrizal, Yufrizal Yusra M. Nur Zainal Abadi Zainal Abadi Zuanda Maulana Nasution