Article Per Year (5 Year)
p-Index From 2021 - 2026
2.391
P-Index
This Author published in this journals
All Journal Jurnal Teknik Mesin R.E.M (Rekyasa Energi Manufaktur) Jurnal Turbo : Jurnal Program Studi Teknik Mesin Jurnal SOLMA JURNAL CRANKSHAFT International Journal of Marine Engineering Innovation and Research Multidiciplinary Output Research for Actual and International Issue (Morfai Journal) Jurnal Abdimas Perbanas AutoMech : Jurnal Teknik Mesin SCIENCE MATH Journal of Renewable Engineering
Yongkimandalan, Nicky
UPN “Veteran” Jakarta
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry 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 Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Transportation Other

Published : 17 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 17 Documents
Search

 1   2 
Parametric Design Optimization of Inner Chassis Retarder Bracket Using Finite Element Analysis Nicky Yongkimandalan; Mochammad Dwi Julianto
TURBO [Tulisan Riset Berbasis Online] Vol 15 No 1 (2026): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/turbo.v15i1.4957

Abstract

The inner chassis retarder bracket is a critical structural component in heavy-duty truck braking systems that transfers braking loads from the electromagnetic retarder to the vehicle chassis. Excessive stress concentration in this component may reduce structural reliability and increase the risk of failure during operation. Although finite element analysis (FEA) has been widely applied to optimize automotive brackets, studies focusing on the parametric optimization of heavy-duty inner chassis retarder brackets through local geometric modification remain limited. This study aims to optimize the structural performance of the right-side inner chassis retarder bracket by investigating the effects of fillet radius and bracket thickness using finite element analysis. Three fillet radius (5, 10, 15, and 20 mm) and thickness levels 10 mm and 16 mm were evaluated for two candidate materials, ASTM A36 structural steel and GGG60 ductile cast iron, resulting in eighteen design configurations. Static structural simulations were performed using ANSYS Workbench 2022 R1 under combined gravitational and retarder torque loading. Structural performance was assessed based on equivalent (von Mises) stress, total deformation, and safety factor. The optimum configuration was obtained using a 15 mm fillet radius and a 16 mm bracket thickness. Compared with the initial design, this configuration reduced the maximum von Mises stress by 62.90% for ASTM A36 steel and 66.01% for GGG60, while decreasing the maximum deformation by 61.19% and 54.91%, respectively. The corresponding minimum safety factor increased by 169.62% for ASTM A36 steel and 335.47% for GGG60, indicating a substantial improvement in structural reliability. These results demonstrate that localized geometric optimization combined with appropriate material selection effectively improves the structural performance of heavy-duty retarder brackets without requiring major modifications to the overall component geometry.
Effect of Flow Disturbance Geometry on Thermal Hydraulic Performance of Forced Air-Cooled Heat Sinks for CPU Cooling Annisa Fitriola Suryawati; Damora Rhakasywi; Nicky Yongkimandalan; Bima Rakha Adhitama
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 11 No 1 (2026): June
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v11i1.1840

Abstract

The increasing thermal load in modern electronic devices necessitates efficient and reliable cooling strategies, particularly for air-cooled heat sinks in CPU applications. This study numerically investigates the effect of flow-disturbance geometry on the thermal–hydraulic performance of a forced air-cooled channel under constant heat flux. Three configurations—circular, square, and octagonal—were evaluated against a baseline using a validated CFD approach based on the RANS equations with the k–ω SST model, with a 7.65% deviation. The results show that geometric disturbances significantly influence temperature distribution and pressure drop. The octagonal model achieves the lowest excess temperature across airflow velocities of 1–2 m/s but produces the highest pressure drop, while the square model provides notable temperature reduction with moderate pressure loss by improving airflow uniformity and disrupting the thermal boundary layer. Overall, the square configuration offers the most optimal balance between heat transfer and energy efficiency.
Thermo-hydraulic Performance of Double-cut and Perforated Twisted Tape Based on Constant Surface Area Naufal Faizurrahman Siregar; Damora Rhakasywi; Nicky Yongkimandalan
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 11 No 2 (2026): In Progress
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v11i2.1856

Abstract

Improving the heat transfer of the heat exchanger pipe needs to be done. Inserting twisted tapes is often applied because it increases the Nusselt number, but it causes excessive pressure drop. This study investigates three variations of twisted tape, namely: plain, semicircular double cut, and circular perforation. The research gap concerns reducing the surface area of the twisted tape to the same area. Simulation using ANSYS Fluent. Variation analysis shows the Nusselt number increased by 36.64% for smooth, 40.94% for double semicircular cuts, and 36.95% for circular perforations. The friction factor increased by 232.26%, 253.46%, and 239.96%, respectively. The PEC value for each variation below 1 indicates a decrease in efficiency after the addition of the twisted tape. However, this study concludes that the double cut has the highest efficiency compared to other variations for the Reynolds number range of 6000 to 17000.
NUMERICAL INVESTIGATION OF DEPTH RATIO EFFECTS ON THERMOHYDRAULIC PERFORMANCE OF A HEAT EXCHANGER WITH V-CUT TWISTED TAPE Farrel Rizqiadinata; Damora Rhakasywi; Nicky Yongkimandalan
Multidiciplinary Output Research For Actual and International Issue (MORFAI) Vol. 6 No. 5 (2026): Multidiciplinary Output Research For Actual and International Issue
Publisher : RADJA PUBLIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.21613820

Abstract

Using Computational Fluid Dynamics (CFD), this research evaluates the thermo-hydraulic effects of altering the depth ratio of V-cut twisted tape (VTT) inserts within tubular heat exchangers. Three specific configurations (De/w = 0.25, 0.35, and 0.45) were simulated and compared to baseline cases of plain tubes and traditional twisted tapes. System characteristics were analyzed using flow behavior, Nusselt number, friction factor, and the Performance Evaluation Criterion (PEC). To ensure reliability, the numerical framework was verified using established empirical correlations and experimental data, yielding deviations below 5%. The simulated outcomes indicate that swirl generation, enhanced radial mixing, and thermal boundary-layer disruption drive the heat transfer improvements of the twisted tapes, with the V-cut geometries accelerating vortex generation and fluid recirculation. Although VTT systems successfully optimize thermal dissipation, they incur elevated hydraulic penalties. This trade-off between pressure drop and thermal efficiency is clearly reflected in the PEC trends, where flow visualizations confirm that larger depth ratios significantly augment fluid mixing and thermal restructuring.
Peningkatan Kompetensi Penggunaan APAR Melalui Pelatihan Teknik PASS di Lingkungan Fakultas Teknik. Nicky Yongkimandalan; Didi Harlianto; Hilmana Radhia Putera
Jurnal Abdimas Perbanas Vol. 7 No. 1 (2026): Jurnal Abdimas Perbanas
Publisher : Institut Keuangan-Perbankan Dan Informatika Asia Perbanas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56174/jap.v7i1.1174

Abstract

Aktivitas laboratorium dan penggunaan peralatan bertenaga tinggi di lingkungan Fakultas Teknik menimbulkan potensi kebakaran yang tidak dapat diabaikan. Walaupun alat pemadam api ringan tersedia di hampir seluruh gedung, sebagian besar dosen dan tenaga kependidikan belum memiliki keterampilan memadai untuk menggunakannya secara tepat pada kondisi darurat. Situasi tersebut menjadi alasan dilaksanakannya kegiatan pengabdian masyarakat yang berfokus pada peningkatan kemampuan pemadaman awal. Tujuan kegiatan ini adalah memberikan pemahaman yang lebih utuh mengenai cara mengenali sumber penyalaan, memilih alat pemadam yang sesuai, serta mengoperasikannya melalui langkah yang benar. Pendekatan yang digunakan meliputi penyampaian materi secara langsung, demonstrasi pemadaman, dan latihan lapangan yang memungkinkan peserta mencoba sendiri empat tahap utama penggunaan alat, mulai dari membuka pengaman, mengarahkan semburan ke dasar api, menekan tuas, hingga menggerakkan pancaran secara menyapu. Hasil kegiatan menunjukkan peningkatan yang nyata pada pemahaman dan keyakinan peserta dalam menangani api kecil, tercermin dari perbandingan nilai sebelum dan sesudah pelatihan serta ketepatan gerakan selama praktik. Kegiatan ini juga menumbuhkan kesadaran bahwa penanganan awal yang cepat dan benar dapat mencegah kerugian yang lebih besar. Secara keseluruhan, program ini berhasil memperkuat kesiapsiagaan warga fakultas dan menjadi langkah penting dalam membangun lingkungan kampus yang lebih aman.
PENGARUH VARIASI ARUS GAS METAL ARC WELDING (GMAW) TERHADAP KEKUATAN TARIK SAMBUNGAN T-JOINT PADA CROSSMEMBER BAJA JIS G3101 SS400 Kato Ra'if Naufal; Nicky Yongkimandalan
JURNAL CRANKSHAFT Vol. 9 No. 1 (2026): Jurnal Crankshaft Vol. 9 No. 1 (2026)
Publisher : Badan Penerbit Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24176/cra.v9i1.16952

Abstract

Welded joints in vehicle chassis structures, particularly the connection between crossmembers and longitudinal members, play a critical role in ensuring structural integrity and load-bearing performance in commercial vehicles. This study aims to analyze the effect of welding current variation in the Gas Metal Arc Welding (GMAW) process on the tensile strength of T-joint welds made of JIS G3101 SS400 steel applied to ladder frame crossmembers. Welding was performed using ER70S-6 filler wire with a diameter of 1 mm under three different current settings: 72 A, 85 A, and 104 A. Other welding parameters, including welding speed and welding position, were maintained constant to ensure experimental consistency and isolate the influence of current variation. The welded specimens were subjected to tensile testing using a Universal Testing Machine (UTM) until failure in order to obtain maximum load capacity, tensile stress, and deformation characteristics. The experimental results indicate that welding current significantly influences the mechanical performance of the welded joint. The 85 A current produced the highest maximum load of 130.4 kN and an ultimate tensile strength of 434.83 MPa, indicating optimal penetration and fusion quality. At 72 A, insufficient heat input resulted in lower penetration and reduced tensile strength. Conversely, the 104 A current introduced higher heat input, which increased the width of the heat-affected zone and showed a tendency toward localized distortion. Based on the analysis, it can be concluded that a welding current of 85 A represents the optimal parameter for the joint configuration and material used in this study. These findings provide practical recommendations for chassis fabrication and repair processes to improve structural reliability and tensile performance
Machine Learning-Based Structural Health Monitoring Systems Nicky Yongkimandalan
Journal of Renewable Engineering Vol. 3 No. 4 (2026): JORE - August
Publisher : Pt. Anagata Sembagi Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62872/rg2xfk75

Abstract

Structural health monitoring (SHM) has shifted from periodic visual inspection and threshold-based signal processing toward data-driven diagnosis powered by machine learning (ML). This article synthesizes recent developments in ML-based SHM across civil, aerospace, and composite structures, focusing on sensing modalities, learning paradigms, and damage-related tasks (detection, localization, quantification, and prognosis). Drawing on a thematically organized body of twenty-five peer-reviewed sources published mainly between 2021 and 2026, the review traces the field's progression from supervised classifiers trained on labeled vibration or strain data toward unsupervised and physics-informed models capable of operating under scarce or unlabeled damage data and fluctuating environmental and operational conditions. The discussion highlights persistent challenges, including the scarcity of real damage-state data, sensitivity to environmental and operational variability, limited interpretability of deep architectures, and the difficulty of transferring models across structures. The article's novelty lies in proposing an integrated conceptual framework that links sensing, feature representation, learning strategy, and decision support into a single life-cycle pipeline, rather than treating these as isolated research strands. The synthesis further identifies digital twins, physics-informed learning, and explainable artificial intelligence as convergent directions for closing the gap between laboratory-validated ML-SHM models and trustworthy, field-deployable infrastructure management systems
Co-Authors Aep Surahto Anisa Rahmah Kusuma Annisa Fitriola Suryawati Avorizano, Arry Ayu Mika Sherila Bima Rakha Adhitama Bintoro, Sefrian Rizki Damora Rhakasywi Didi Harlianto Didi Harlianto F. Firmansyah Fani Firmansyah Farrel Rizqiadinata Fazli Iqbal Pasha Fikri, Agus Harlianto, Didi Jonesti, Wilfadri Putra Kato Ra'if Naufal Krisnawati, Luh MARTINI, NI PUTU DEVIRA AYU Mochammad Dwi Julianto Mujirudin, Mujirudin Naufal Faizurrahman Siregar Pratama, Rafli Ersandi Putera, Hilmana Radhia Regina N. Lumbantoruan Riyan Ariyansah Rizki Apriza Rizki Dwi Ardika Syifaul Janan Tarigan, Amenda Septiala Tuhfatul Janan Yustrandi, Anggi Z. H. Putty Fauthyda