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Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi
Published by Universitas Teuku Umar
ISSN : 24775029     EISSN : 25020498     DOI : -
Core Subject : Engineering,
Aerospace Engineering Automotive Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering
Jurnal Mekanova merupakan kumpulan karya ilmiah para akademisi, peneliti dan praktisi yang bertujuan menyatukan pengalaman-pengalaman, ide-ide dan hasil penelitian terutama dalam bidang“Mekanikal, Inovasi dan Teknologi”.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 350 Documents
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Kajian Springback pada OP20 Komponen Striker Read Seat Back Suzuki dan Penyesuaian Radius Insert Dies Erlangga Guswan Valen; Rizal Hanifi; Boni Sena; Ujibur Rahman
Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Vol 12, No 2 (2026): Oktober
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jmkn.v12i2.13792

Abstract

AbstrakThis study aims to identify the springback problem in the OP20 bending operation of the Striker Read Seat Back 63332–68P30 component for Suzuki vehicles at PT. XYZ and to examine die insert radius adjustment as a corrective action. A descriptive case study was conducted using observations and interviews reported during an industrial placement, a review of technical documentation, and comparison with the literature. The documentation specifies SS400 material with an 8.0 mm stock diameter, OP10 forming and OP20 bending operations, and an inspection tolerance of ±0.5 mm using a checking fixture. For OP20, the report describes widening using values of 0.5–2.5 mm and identifies a reduction in the die insert radius as the corrective action. However, these values are not accompanied by a definition of the measured dimension, individual specimen data, initial and final radius values, or post-correction measurements. Consequently, neither the magnitude of dimensional improvement nor post-modification tolerance compliance can be quantified. This study maps the OP20 problem, the rationale for tool geometry correction, and the dimensional verification requirements. Further evaluation should compare measurements before and after modification using the same dimensional reference and forming conditions.Keywords: springback; OP20; die insert radius; SS400; dimensional inspection.
Sifat Tarik dan Keausan Komposit Poliester Berpenguat Serat dan Serbuk Buah Pinang untuk Kandidat Material Kampas Rem Wisnu Prabudi; Mawardi Mawardi
Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Vol 12, No 2 (2026): Oktober
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jmkn.v12i2.16749

Abstract

This study aims to analyze the mechanical properties and wear resistance of composite brake pad materials made from polyester resin, areca nut powder, and areca nut fiber. The research employed an experimental method involving three composition variations: A (65% resin, 5% catalyst, 20% areca nut powder, and 10% areca nut fiber), B (60%, 5%, 25%, and 10%, respectively), and C (55%, 5%, 30%, and 10%, respectively). Each variation consisted of three specimens, resulting in a total of nine test specimens. The material properties were evaluated through tensile and wear tests using the pin-on-disc method. The tensile test results showed that variation A had the highest average maximum stress of 8.57 MPa, maximum load of 822.10 N, and yield strength of 4.59 MPa. Meanwhile, the wear test results indicated that variation C had the lowest wear rate of 2.64 × 10⁻³ mm³/m, followed by variation B at 3.92 × 10⁻³ mm³/m and variation A at 5.10 × 10⁻³ mm³/m. These results indicate differences in the material's tensile strength and wear resistance characteristics. Variation C may be considered a candidate for further development when wear resistance is prioritized, although variation A exhibits higher tensile strength. This study did not evaluate the coefficient of friction or braking performance; therefore, the suitability of the material for brake pad applications cannot yet be established. Further testing and direct comparisons with commercial brake pad products are necessary to comprehensively evaluate its performance.Keywords—Areca nut, natural fiber, composite, brake pad, tensile testing, wear resistance.
Rancang Bangun dan Uji Kinerja Mesin Pengurai Sabut Kelapa Skala Kecil Penghasil Cocopeat dan Cocofiber Bahdin Ahad Badia; La Hasanuddin; Samhuddin Samhuddin; Muhammad Idris Putra; Citra Yurnidar Syah; Dika Al-Fahri; Rohid Rohid; Andri Andri
Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Vol 12, No 2 (2026): Oktober
Publisher : universitas teuku umar

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Abstract

Sabut kelapa merupakan limbah pertanian yang belum banyak dimanfaatkan, padahal dapat diolah menjadi cocopeat dan cocofiber. Penguraian secara manual membutuhkan waktu dan tenaga yang besar. Penelitian ini bertujuan merancang, membuat, dan menguji kinerja mesin pengurai sabut kelapa skala kecil yang memakai komponen yang tersedia di pasaran. Metode meliputi perancangan, pembuatan, perakitan, dan pengujian tiga ulangan. Mesin digerakkan motor bensin 5,5 HP dengan transmisi puli dan sabuk-V (rasio 3,33), memakai 10 pisau bergerak dan 18 pisau tetap di dalam rumah pengurai berdiameter 250 mm, pada rangka berukuran 1.260 × 470 × 750 mm. Pengujian memakai 2 kg sabut kelapa yang ditimbang dalam keadaan kering, direndam, diurai, lalu produknya dikeringkan sebelum ditimbang. Waktu penguraian rata-rata 6 menit 58 detik (418 ± 3 detik). Laju bahan masuk 17,2 ± 0,1 kg/jam (basis kering), laju massa produk keluaran 16,6 ± 0,3 kg/jam, dan rendemen massa 96,7 ± 1,4%, dengan 0,78 ± 0,03 kg cocopeat dan 1,15 ± 0,05 kg cocofiber per 2 kg bahan. Mutu pemisahan, kadar air, dan daya aktual tidak diukur. Hasil berlaku untuk kondisi bahan dan prosedur yang diuji.
Rancang Bangun dan Evaluasi Awal Sistem Pengereman Elektro-Pneumatik Pada Prototipe Mobil Listrik Roda Empat Christof Geraldi Simon; Simon Ka'ka; Festo Andre Hardinsi; Risa Lasarus; Formanto Paliling
Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Vol 12, No 2 (2026): Oktober
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jmkn.v12i2.16570

Abstract

Penelitian ini bertujuan merancang, mengimplementasikan, dan mengevaluasi kinerja sistem pengereman udara berbasis elektro-pneumatik pada mobil listrik roda empat. Sistem dikembangkan untuk menyediakan alternatif pengereman mekanis yang memanfaatkan udara bertekanan dan dikendalikan secara elektrik. Perancangan mengintegrasikan kompresor udara, tangki, pressure control valve, katup solenoid 5/2, silinder pneumatik double acting, rem tromol, pedal rem elektrik, brushless controller, dan modul step-down. Pengujian dilakukan melalui variasi tekanan 1–5 bar untuk mengamati panjang langkah piston dan penurunan tekanan, dilanjutkan pengujian kendaraan pada tekanan kerja 3 bar dengan variasi kecepatan 19–36 km/jam. Hasil menunjukkan panjang langkah piston meningkat dari 49,0 mm pada 1 bar menjadi 88,8 mm pada 5 bar, dengan rata-rata 65,4 mm. Gaya pengereman meningkat dari 49,09 N menjadi 245,44 N dan torsi dari 1,47 Nm menjadi 7,36 Nm. Pada tekanan 3 bar, sistem mampu menghentikan kendaraan pada seluruh kecepatan uji dengan jarak berhenti 17–145 cm dan waktu 3,0–4,5 s. Hasil ini menunjukkan bahwa sistem elektro-pneumatik yang dikembangkan berfungsi dan layak sebagai prototipe pengereman pada mobil listrik, dengan kebutuhan pengembangan lebih lanjut pada tekanan dan kecepatan yang lebih tinggi. 
Pengaruh Variasi Feed Rate Mikro Stir Welding (FSW) Pada Bahan Alumunium 6063 Robby Prima Hidayat; Viktor Naubnome; Ratna Dewi
Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Vol 12, No 2 (2026): Oktober
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jmkn.v12i2.13957

Abstract

Friction stir welding (FSW), known for its energy efficiency and environmental friendliness, is suitable for joining aluminum and its alloys without melting. This study evaluates the effect of feed rate variation on the tensile strength, mechanical properties, hardness level, and microstructure of Aluminum 6063. In tensile testing, hardness (Vickers), and microstructure analysis, the experimental method used was to vary the feed rate from 60 mm/min, 90 mm/min, and 120 mm/min. The results showed that the feed rate significantly affected tensile strength and hardness. At a feed rate of 60 mm/min, the highest tensile strength was achieved at 548.008 MPa and the highest hardness was 81.9 HV. A feed rate of 90 mm/min produced the highest tensile strength of 735.283 MPa. However, at 120 mm/min, the tensile strength decreased to 114.194 MPa. The microstructure results also showed variations, with higher feed rates producing finer grains in the heat-affected zone (HAZ). In conclusion, adjusting the feed rate is important in FSW to achieve optimal mechanical properties. Lower feed rates produce better welds in terms of tensile strength and hardness, while higher feed rates can affect the microstructure of the material.Keywords: Micro friction stir welding, feed rate, tensile strength
Pengaruh Lama Perendaman NaOH Terhadap Pengujian Tarik dan Karakteristik Patahan Komposit Lamina Serat Sisal–Poliester Fikran Fikran; Christof Geraldi Simon
Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Vol 12, No 2 (2026): Oktober
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jmkn.v12i2.16692

Abstract

Natural fiber composites have potential as lightweight and environmentally friendly materials. This study investigated the effects of sisal fiber immersion time in 5% NaOH solution on the maximum tensile stress, maximum strain, and macrostructural fracture characteristics of polyester-matrix sisal fiber laminate composites. Immersion times were 1, 2, 3, 4, and 5 h, with five specimens per treatment. Tensile testing was conducted according to ASTM D638 Type III using a Universal Testing Machine (UTM), and fracture surfaces were examined using a digital microscope. The highest mean tensile stress was obtained after 3 h of immersion (27.3002 N/mm²), while the lowest occurred after 1 h (17.5245 N/mm²). One-way ANOVA revealed significant differences in tensile stress among treatments (F(4, 20) = 12.3808, p = 0.0000315), and Tukey HSD identified significant differences between several group pairs. The highest mean strain was also observed after 3 h (8.4982%); however, Welch’s ANOVA indicated no significant differences among treatments (F(4, 9.50) = 1.2120, p = 0.3675). Signal-to-noise (S/N) analysis yielded the highest values at 3 h for tensile stress and strain, at 28.5245 dB and 17.6453 dB, respectively. Macroscopic observations revealed voids in specimens immersed for 1–2 h and fiber breaking in those immersed for 3–5 h. Overall, 3 h of immersion produced the highest mean tensile stress and strain, although significant differences were found only in tensile stress.Keywords— Sisal fiber, NaOH treatment, tensile stress, strain, fracture characteristics..
Optimasi Parameter Injection Moulding Terhadap Penyimpangan Volume Gantungan Pakaian Polipropilena Menggunakan Metode Taguchi Fachrizal Cesar Putra; Bahdin Ahad Badia; Samhuddin Samhuddin; Muhammad Idris Putra; Citra Yurnidar Syah; Raja Agung Hasudungan Simanjuntak
Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Vol 12, No 2 (2026): Oktober
Publisher : universitas teuku umar

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Abstract

 Polypropylene clothes hangers are widely produced by injection moulding, and volume variation is a common concern because it relates to product strength and durability. This study determines the parameter combination predicted to be optimal for hanger volume using the Taguchi design. Four parameters were examined at three levels: heating temperature (200, 250, 300 °C), cooling temperature (10, 15, 20 °C), injection time (10, 14, 18 s), and cooling time (15, 20, 25 s), in an L9(3⁴) orthogonal array with three replications (27 observations). Volume was calculated from product mass using a fixed density, so it is equivalent to a mass measurement. The signal to noise (S/N) ratio was computed from the deviation of volume from a target of 89.63 cm³ using the smaller-the-better criterion, so it measures closeness to the target rather than volume uniformity alone. In the S/N ANOVA (nine S/N values, factor B pooled into error), the contributions were heating temperature 54.33%, injection time 21.67%, and cooling time 10.44%. Only heating temperature was significant at α = 0.10 (p = 0.055); injection time (p = 0.119) and cooling time (p = 0.197) were not. A supplementary analysis of the 27 raw data showed heating temperature, injection time, and cooling time to be significant and cooling temperature not (p = 0.709). The combination of 300 °C, 15 °C, 10 s, and 15 s is a predicted optimum that has not been confirmed experimentally. Agreement between manual and Minitab results shows only computational consistency.
Development and Performance Evaluation of a PLC-Unity3D Sorting Conveyor Trainer Using FINS, Node-RED, and MQTT Wirdiyan Dzakwan Hanif; Sandy Bhawana Mulia; Ridwan Ridwan; Sarosa Castrena Abadi; Danu Jaya Saputro
Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Vol 12, No 2 (2026): Oktober
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jmkn.v12i2.16571

Abstract

The development of Industry 4.0 requires graduates to possess competencies beyond conventional PLC mastery, particularly in understanding physically and virtually integrated automation systems. This study addresses this by designing and developing a semi-physical trainer module for a sorting conveyor system, integrating a physical PLC controller with its real-time virtual counterpart in Unity3D. The system utilizes a communication architecture combining the FINS protocol, Node-RED, and MQTT to ensure seamless connectivity. Performance evaluation demonstrates the system's effectiveness, achieving an 80% sorting accuracy across various speeds. Furthermore, latency testing confirmed its near real-time capability, with an average end-to-end delay of 391.25ms from the PLC to the virtual plant's response. These results validate the proposed system as a functional and representative training tool to support automation learning in the Industry 4.0 era.
Analisis Kegagalan Fatigue dan Evaluasi Material Pengganti Shaft delumper Berbasis Elemen Hingga Jagodang Harahap; Bukhari Kasim; Syahrul Fathi; Iqbal Tanjung; Andri Afrizal
Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Vol 12, No 2 (2026): Oktober
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jmkn.v12i2.16369

Abstract

A failure originating from a crack that propagated into a fracture occurred in the middle section of a shaft delumper at PT Pupuk Iskandar Muda specifically near the center bearing seat resulting in a production stoppage. This study was conducted in two stages: identifying the root cause of the failure through visual inspection and fractography of the fracture surface, followed by evaluating the suitability of AISI 1045 and AISI 4140 steels as replacement candidates for Carbon 1114 using Finite Element Method (FEM) simulation in SolidWorks Simulation software, with standardized geometry and loading to ensure result comparability. Analysis results indicate that the critical peak stress point was located on the shaft near the center bearing seat, triggering stress concentrations exacerbated by cyclic tensile-compressive loading, micro-friction at the shaft-bearing interface, and the low fatigue resistance of the Carbon 1114 material due to the presence of manganese sulfide inclusions; all these factors point to fatigue failure. Under a torsional load of 4,726 N·m, Carbon 1114 exhibited a von Mises stress of 206.31 MPa, a deformation of 4.58 mm, a safety factor of 1.939, and Kerusakan lelah of 14.152%. AISI 1045 recorded the lowest stress and deformation values (204.70 MPa; 4.53 mm) with a safety factor of 2.589 and a damage level of 5.195%, whereas AISI 4140 showed the highest stress and deformation (209.03 MPa; 4.65 mm) due to variations in its modulus of elasticity; however, this material outperformed the others in terms of safety factor (3.542) and fatigue resistance (4.440% damage) thanks to its significantly higher yield strength. These findings confirm that material reliability is determined more by yield strength and fatigue resistance than by the magnitude of nominal stress, thereby establishing AISI 4140 as the optimal replacement material. The study demonstrates that a root cause analysis combined with finite element simulation for various materials is an effective approach to addressing the failure of the shaft delumperKeywords— Failure Analysis, Shaft delumper, Finite Element Method, Fatigue, AISI 4140.
Preliminary Design and Machine-Learning Surrogate Modelling of Training-Glider Flight Performance Teuku Arriessa Sukhairi; M. Nofian Sukmana; Ikramullah Muhammad; Syahrul Fathi; Mufti Mufti
Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Vol 12, No 2 (2026): Oktober
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jmkn.v12i2.16745

Abstract

Training gliders are the entry platform of pilot education, yet domestic design capability for this class in Indonesia remains limited. This study develops the preliminary design of a single-seat glider for the early solo phase of training and a machine-learning (ML) surrogate of its steady glide performance. The design follows Raymer's method with a NACA 6409 section analysed with NeuralFoil and a take-off mass of 420.3 kg based on the CS-22 occupant allowance. The maximum aerodynamic efficiency is 21.67 and the stall speed 20.56 m/s. From a 600 m release in still air, the range and endurance are 13.0 km and 10.4 min at the theoretical best-glide speed, or 12.8 km and 9.5 min with a 1.1 stall-speed margin; the 20 min requirement is not met and needs a release height of about 1268 m or thermal lift. Five regressors were trained on 2000 Latin Hypercube samples generated by deterministic analytical equations, so their accuracy measures approximation fidelity rather than physical validation. Gaussian Process Regression was the most accurate (10-fold cross-validated MAPE 0.005%, 95th-percentile error below 0.08%) and its prediction intervals were conservative. Sobol' indices show that parasite drag and aspect ratio govern aerodynamic efficiency, while wing loading and maximum lift coefficient govern stall speed.Keywords—glider, preliminary design, flight performance, surrogate modelling, sensitivity analysis

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