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All Journal Jurnal Teknik Mesin CIVED (Journal of Civil Engineering and Vocational Education) QALAMUNA: Jurnal Pendidikan, Sosial, dan Agama INVOTEK: Jurnal Inovasi Vokasional dan Teknologi JURNAL PENDIDIKAN TAMBUSAI Jurnal Teknologi Informasi dan Pendidikan MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat GANDRUNG: Jurnal Pengabdian Kepada Masyarakat Teknomekanik Ideguru: Jurnal Karya Ilmiah Guru Jurnal Vokasi Mekanika Al-Alam : Islamic Natural Science Education Journal Tsaqofah: Jurnal Penelitian Guru Indonesia MASALIQ: Jurnal Pendidikan dan Sains Jurnal Aplikasi IPTEK Indonesia Al-DYAS : Jurnal Inovasi dan Pengabdian kepada Masyarakat Journal of Engineering Researcher and Lecturer Ranah Research : Journal of Multidisciplinary Research and Development Journal of Innovative and Creativity Journal of Civil Engineering and Vocational Education Venus: Jurnal Publikasi Rumpun Ilmu Teknik Journal of Golden Generation Education JRTI (Jurnal Riset Tindakan Indonesia)
Delima Yanti Sari
Universitas Negeri Padang
Religion Aerospace Engineering 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 Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Public Health Social Sciences Transportation Other

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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.
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.
Effect of Weld Groove Type Variations on Deformation in Structural Carbon Steel Butt Joint Welding Using the Finite Element Method Muhammad Daffa Dzaky; Delima Yanti Sari; Waskito Waskito; Junil Adri
Jurnal Vokasi Mekanika (VoMek) Vol 7 No 3 (2025): Jurnal Vokasi Mekanika
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v7i3.877

Abstract

Deformation in welded joints can reduce the precision, strength, and service life of a structure, especially in structural carbon steel commonly used in the construction industry. One of the main factors influencing deformation is the type and angle of the weld groove. This study aims to analyze the effect of groove type and angle variations on deformation in butt joint welding of structural carbon steel. The method used is a numerical simulation based on the Finite Element Method (FEM) using ANSYS software, consisting of transient thermal and transient structural analyses. The groove variations include V-grooves with angles of 45°, 60°, and 75°, as well as U-grooves with angles of 50°, 60°, and 70°. The simulation results show that the V-groove with a 45° angle produces the maximum deformation of 2.1317 mm, while the U-groove with a 70° angle results in the minimum deformation of 0.23808 mm. These findings indicate that U-grooves generally produce lower deformation compared to V-grooves. Therefore, selecting the appropriate groove design can enhance the quality of weld joints and the overall structural performance.
Effect of Airfoil Profile Variations on the Rear Wing of a Racing Car on the Downforce Coefficient Using Computational Fluid Dynamics (CFD) Simulation Carlen Muhammad Hendra; Delima Yanti Sari; Arwizet K; Fitrah Qalbina
Jurnal Vokasi Mekanika (VoMek) Vol 7 No 3 (2025): Jurnal Vokasi Mekanika
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v7i3.881

Abstract

Variation of airfoil profile shape in race car rear wings plays a crucial role in generating optimal downforce to improve traction and vehicle stability. The main issue addressed in this study is the lack of clarity regarding which airfoil profile and angle of attack configuration are most effective in producing the highest downforce coefficient (Cdown). This research aims to analyze the aerodynamic performance of symmetric airfoils NACA 0012 and NACA 0015 at three different angles of attack, namely 9.5°, 19.5°, and 29.5°, using Computational Fluid Dynamics (CFD) simulation. The simulations were performed under steady-state flow conditions with an appropriate turbulence model to accurately capture pressure distribution and airflow characteristics. Results show that NACA 0012 generated higher and more stable Cdown values at low to medium angles, with the highest value of 1.4 at 29.5°. In contrast, NACA 0015 exhibited a more gradual performance increase and reached a Cdown of 1.2 only at the highest angle. The study concludes that slender airfoil profiles like NACA 0012 are more suitable for circuits with sharp corners, while NACA 0015 is better suited for straight tracks requiring progressive aerodynamic stability. This research contributes to optimizing rear wing design based on the aerodynamic demands of race cars.
Numerical Simulation of Natural Frequency on Shaft Using ANSYS Software Yopi Zekrri Jenizah Putra; Delima Yanti Sari; Waskito Waskito; Zainal Abadi
Jurnal Vokasi Mekanika (VoMek) Vol 7 No 3 (2025): Jurnal Vokasi Mekanika
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v7i3.883

Abstract

This descriptive study aims to analyze the effect of shaft diameter on the natural frequency and maximum deformation of a rotating shaft system. The analysis was conducted through numerical simulation using ANSYS Workbench software. The shaft and two symmetrically positioned disks were modeled, and a modal analysis was performed using the Finite Element Method (FEM) to determine the system’s first ten vibration modes. Simulation results showed that the natural frequencies ranged from 80.495 Hz to 280.4 Hz, with a maximum deformation of 58.903 mm occurring in the 9th mode. The lower modes (modes 1–6) exhibited lower frequencies but higher deformation, while higher modes (modes 7–10) showed more complex vibration patterns with consistently significant deformation values. This indicates that higher frequency does not necessarily result in lower deformation, and the system may still experience critical vibration. These findings demonstrate that the shaft's geometric configuration, including diameter and mass distribution of the disks, significantly affects its dynamic behavior. The simulation provides deeper insight into the vibration characteristics of the critical speed shaft apparatus used in practical experiments and serves as a reference for validating theoretical approaches such as the Dunkerley and Rayleigh methods.
Numerical Analysis of Coupled Thermal-Mechanical on Drum Brakes Hukmanul Fikri; Delima Yanti Sari; Waskito Waskito; Wanda Afnison
Jurnal Vokasi Mekanika (VoMek) Vol 7 No 3 (2025): Jurnal Vokasi Mekanika
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v7i3.884

Abstract

Drum brakes are one of the crucial components in motor vehicle braking systems, particularly in motorcycles, due to their advantages in production cost and resistance to environmental contamination. However, this type of brake has limitations in dissipating heat during braking, which can lead to temperature accumulation, thermal deformation, and reduced braking efficiency. This study aims to analyze the thermo-mechanical performance of drum brakes with various cooling groove designs (solid, straight-grooved, and slant-grooved) using a numerical method based on Finite Element Analysis (FEA) in ANSYS Workbench. The analysis was conducted in a transient manner, both thermally and structurally, to evaluate temperature distribution and total deformation for each design. The results show that the slant-grooved drum brake design yields the lowest temperature distribution and total deformation values, especially at high braking speeds, with a temperature distribution of 56.899?°C and total deformation of 17.67?×?10?³?mm. These findings indicate that groove design significantly affects the heat dissipation and structural deformation performance of the brake system. The study concludes that the slant-grooved design is superior in reducing heat and deformation, thereby offering the potential to improve braking safety and efficiency.
Experimental Study of Geometrical Accuracy of Artec Leo 3D Scanner on Complex Object Scanning Muhammad Khattami Al Saidhi; Rifelino Rifelino; Delima Yanti Sari; Febri Prasetya
Jurnal Vokasi Mekanika (VoMek) Vol 7 No 3 (2025): Jurnal Vokasi Mekanika
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v7i3.890

Abstract

This study aims to measure the geometrical accuracy of complex object scanning using the Artec Leo 3D scanner. The scanned object is a wheel rim, with eight combinations of parameters including variations in distance (50 cm and 100 cm), scanning angle (45° and 90°), and lighting conditions (indoor and outdoor). Deviations were measured from four reference points on the scanned model and compared to a reference model. The results show that the Indoor configuration with a scanning distance of 50 cm and a scanning angle of 90° gives the smallest deviation of 0.025 mm (0.01%), while the Outdoor configuration with a scanning distance of 50 cm and a scanning angle of 45° produces the largest deviation of -3.275 mm (-1.80%). The overall average deviation of all combinations is -0.63 mm or -0.36%, indicating that the Artec Leo can produce high accuracy if configured with the right parameters. The smallest deviation was obtained under indoor scanning conditions with a scanning distance of 50 cm and a scanning angle of 90°.
Effect of Rice Husk Ash and Clay Powder as Cooling Media in Post Weld Heat Treatment (PWHT) on The Impact Toughness of SMAW-Welded SS400 Steel Angga Hermawansyah; Zainal Abadi; Delima Yanti Sari; Rifelino
Jurnal Vokasi Mekanika (VoMek) Vol 8 No 2 (2026): Jurnal Vokasi Mekanika
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/f6gkaq38

Abstract

This study investigates the effect of variations in cooling media during Post Weld Heat Treatment (PWHT) on the impact toughness of low carbon steel SS400. The main problem addressed in this research is how differences in cooling medium characteristics influence the cooling rate, which subsequently affects the impact toughness of welded material. The objective of this study is to determine the effect of using rice husk ash, clay, and air as cooling media on the impact toughness value of SS400 steel. The experimental method was employed by applying PWHT to SMAW-welded specimens, followed by Charpy impact testing to obtain the final deflection angle, which was then converted into impact energy and impact value (HI). The results show that clay cooling medium provides the highest average impact toughness value of 1.175 J/mm², followed by rice husk ash at 1.107 J/mm², while air cooling yields the lowest value of 0.845 J/mm². These differences indicate that the thermal characteristics of the cooling media significantly influence the material’s ability to absorb energy before fracture, which is related to the stability of the cooling rate during the PWHT process. It can be concluded that variations in cooling media affect the impact toughness of SS400 steel, where more stable cooling conditions lead to higher toughness values.
Co-Authors - Primawati Abd Aziz Abdul Aziz Abdul Aziz Abdullah, Adlan Azmi Adityo Adityo, Adityo Afdal Dinilhaq Afferli Seftian afriardhy, mudhya_amalia Agusriza Almalik Akbar, M. William Akram Ramadhan Al Afif Attorik Alfian Barwan, Esco Alparis Nico Putra Utama Altarisi, Muhammad Athar Ambiyar, Ambiyar Aminuyati Andika Putra Andira, Muhammad Fadil Andre Kurniawan Andre Kurniawan Andri, Suci Angga Hermawansyah Arafat, Andril Arfan Iswanda Arwizet Arwizet, Arwizet Asnil Asnil Bagas Santoso Bakar, Muhammad Jamil Budi Syahri Bulkia Rahim Carlen Muhammad Hendra Dani Harmanto Delfisanur Delfisanur Deswina, Melri Dinilhaq, Afdal Dori Yuvenda Dwi Sakti Putra Efendi, Fiki Efendi EKA RAHAYU Eko Indrawan Elmoudi, Muhammad Fatiy Ema Wulansari, Rizky Erika Afandi Fadillah, Fikri Fahrezi, Rangga Ashar Faisal Gustianto Fajero Tiffano Farid Permata Putra Fattahul Rizki Fauza, Anna Niska Fauzi, Azmul Febri Prasetya Fenda Lisman Fiki Efendi Fikri, M Fitrah Qalbina Fitrah Qalbina Hafizd Furqon Hamizum, Bestra Hasanuddin Hasanuddin Hasanuddin Hasanuddin Hasanuddin WS Hastuti Hastuti Hendri Nurdin Hesty Kumala Sani Hukmanul Fikri Irshan Sepriza Irzal Irzal Irzal Irzal Jasman Jasman Julian Berlin Roland Tobing Junil Adri Junil Ardi Kelvin Rahmat Syah M Febriyan Baruna Putra Maulana Rafi, Ikhsan Mega Oktaviani Miftahul Fikri Milana Milana Mochammad Imron Awalludin Muhammad Aulia Anugrah Muhammad Azim Muhammad Daffa Dzaky Muhammad Farhan Muhammad Iqbal Iski Muhammad Khattami Al Saidhi Muhammad Rizki Muhammad Rizki Anshari Muhammad Zainul Hasan Muklis Muklis Mulianti Mulianti Mulyadi Mulyadi Nabawi, Rahmat Azis Nelvi Erizon Nizwardi Jalinus Nurdin Hendri Nurwijayanti Oki Darwis Prima Putra Okky Syaifatul, Achmad Pasaribu, Reynaldy Peri Irawan Primawati Primawati purwantono purwantono Purwantono Purwantono Purwantono, Purwantono Putra, Nandri Pratama Putra, Romi Putra, Syafriade Rachman Setiawan Rahmadiawan, Dieter Rasyid Ridho Harahap Refdinal Refdinal Refdinal, Refdinal Remon Lapisa Remon Lapisa Resti Apriliyanti Rhionaldo, Ananda Jafron Richardo, Richardo Ricky Andrianto Rifelino Rifelino Rifelino Rihan Salim, Muhamad Rilgy Aulia Rizki Ramadhan Nasution, Muhammad Rodesri Mulyadi Salmat, Salmat Sani, Hesty Kumala Santoso, Bagas Saputra, Ilham Dwi Satria, Andam Sigit Dwi Lesmana Silfi Chorillah Putri Siregar, Batu Mahadi Sudjono, Aldo Alfattah Sukardi Sukardi Sukardi, Sukardi Syahril Syahril Tasyah Tasyah Tsung-Liang Wu Utami, Fathya Suci Wagino Wahyudi Wahyudi Wanda Afnison Waskito Waskito Waskito Waskito Waskito Waskito, Waskito Willyardo Putra Ramon Wulansari, Rizky Ema Yolli Fernanda Yopi Zekri Jenizah Putra Yopi Zekrri Jenizah Putra Yufrizal Yufrizal A Yufrizal Yufrizal Zainal Abadi Zainal Abadi Zuanda Maulana Nasution