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JURNAL CRANKSHAFT
Published by Universitas Muria Kudus
ISSN : 26230720     EISSN : 26230755     DOI : -
Core Subject : Science, Engineering,
Control & Systems Engineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering
Jurnal ini merupakan sarana publikasi dan ajang berbagi karya riset dan pengembangannya di bidang teknologi. Jurnal Crankshaft terbit 2 kali dalam setahun, yaitu pada bulan Maret dan September.
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Articles 263 Documents
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STUDI KONVERGENSI MESH PADA RESPONS HANCUR NUMERIK STRUKTUR SANDWICH HONEYCOMB Syahiir Kamil; M. Nizar Machmud; Iskandar Hasanuddin; Faris Ahmad Mizanus Sabri; Taufan Arif Adlie; Zainal Arif
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.v9i1.16831

Abstract

In this research, finite element methods are utilized to investigate the mechanical behavior of aluminium honeycomb sandwich structures under out-of-plane compression. The structures were virtually compressed from the initial elastic regime until the plateau phase using explicit non-linear analysis modelling approaches. A mesh convergence study is conducted to ensure the accuracy and reliability of the simulation results, aiming to determine the optimal mesh size that balances precision with computational efficiency. An analytical equation for calculating the plateau force, or average crush load, along with experimental data from the study by Mertani, is used to validate the numerical results. The study concludes that a mesh size of 0.5 mm offers an ideal balance between accuracy and computational cost, yielding an error of 3.1%.
ANALISIS KINERJA MESIN PENCACAH SAMPAH DENGAN VARIASI KECEPATAN PUTAR MOTOR LISTRIK Zebtomen Siringoringo; Sigiet Haryo Pranoto; Anis Siti Nurrohkayati; Ananda Sylvano
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.v9i1.16840

Abstract

This study aims to analyze the effect of variations in the rotational speed of an electric motor on shredding capacity and the average size of shredded output in a plastic waste shredding machine. The method used is an experimental approach by conducting direct tests on a shredding machine using a single-phase electric motor with a power of 2 HP, with speed variations of 600 rpm, 900 rpm, and 1200 rpm. The test materials include plastic bottles, plastic bags, and cardboard, with a shredding time of 2 minutes for each test. The observed parameters include the mass of shredded material, shredding capacity (kg/h), and the average size of the shredded output. The results show that the highest shredding capacity for plastic bottles and plastic bags was achieved at a speed of 900 rpm, reaching 25.20 kg/h and 13.50 kg/h, respectively, while for cardboard material, the highest capacity was obtained at 600 rpm, reaching 28.59 kg/h. These findings indicate that increasing rotational speed does not always result in the highest shredding capacity for all materials, as the physical characteristics of the materials influence the shredding performance.
Flow Structures and Performance Characteristics of a Savonius Wind Turbine Under Varying Wind Speeds and Blade Angles Tria Puspa Sari; Anisah Nurul Izzah; Muhammad Hendra Budi Satria; M. Danny Pratama Lamura; Musyaroh; Dhia Fairuz Shabrina
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.v9i1.16912

Abstract

Savonius wind turbines belong to the class of vertical-axis wind turbines (VAWTs) and are well known for the ability to self-start at low wind speeds without the need for yaw control. Despite these advantages, their aerodynamic efficiency remains lower than that of horizontal-axis wind turbines (HAWTs). In this study, the flow structures and performance characteristics of a Savonius wind turbine are examined using streamline visualization under varying wind speeds ranging from 8 to 10 m/s and blade angles between 100° and 130°. The Reynolds number variations reflect changes in the flow regime and momentum exchange caused by different wind speeds and blade orientations. Across all wind speeds, the 120° blade angle consistently resulted in the most favorable flow conditions. Streamline visualization highlights key flow features, including flow separation, vortex development, and wake structures, which play a critical role in determining aerodynamic efficiency and energy capture. By directly relating Reynolds number variations to observable flow phenomena, this study offers practical insights for aerodynamic optimization. The findings contribute to the development of more efficient Savonius wind turbine designs, particularly for applications in low to moderate wind environments.
PROSES MANUFAKTUR SPUR GEAR CUTTER MENGGUNAKAN MESIN FRAIS UNIVERSAL KNEE MILLING MODEL 57-3C Roberth Marshall Ratlalan; Muhammad Arhan
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.v9i1.16932

Abstract

Spur gears are essential components in power transmission systems and are widely used in various mechanical applications. As industrial needs evolve, the use of engineering polymer materials such as Teflon has become an attractive alternative due to their low coefficient of friction, good chemical resistance, low noise levels, and light weight. This study aims to study the manufacturing process for a Teflon (PTFE) spur gear cutter using a Knee Milling Machine Model 57-3C universal milling machine and to evaluate the resulting product's quality control methods. The method used involves several stages: gear dimension design, material and tool preparation, machining parameter settings, tooth formation using a modular milling cutter and dividing head, and finishing, spline groove creation, and threading. Quality control is performed through dimensional measurements using calipers and visual inspection to detect surface defects, cracks, and deformation caused by the cutting process. The results show that a Teflon spur gear cutter with 45 teeth and a module of 2.5 can be manufactured satisfactorily using a universal milling machine. All main dimensions measured are within a tolerance of ±0.20 mm, and no significant defects were found during visual inspection. This shows that the universal milling machine Knee Milling Machine Model 57-3C can be used effectively for manufacturing spur gears made of engineering polymers with an adequate level of accuracy. Keyword : Spur gear, Teflon (PTFE), Knee Milling Machine Model 57-3C, Dividing head, Quality Control.
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
REKAYASA DAN PENGUJIAN MESIN PEMBENTUK DAN PENGASAH PISAU PENCACAH LIMBAH PERTANIAN Irma Fahrizal; Leo Dedy Anjiu; Erwin Erwin; Suhendra Suhendra
JURNAL CRANKSHAFT Vol. 9 No. 2 (2026): Jurnal Crankshaft Vol. 9 No. 2 (2026)
Publisher : Badan Penerbit Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24176/cra.v9i2.17031

Abstract

Shredding machines play a crucial role in agricultural waste processing. A common issue encountered was shredding efficiency, particularly due to the poor quality of the shredding blades. Currently, the process of shaping and sharpening shredding blades was still carried out traditionally, resulting in inconsistent cutting angles. Poor-quality blades result in high energy consumption and low-quality shredded output. To address these issues, a study was conducted aimed at developing a machine capable of integrating the blade forming and sharpening processes into a single system. This research phase includes mechanical engineering, machine performance testing, and analysis of test data. The observed data collected include cutting torque and improvements in cutting performance. The test material used was potato tubers. Based on the engineering results, the machine measures 70 cm in length, 30 cm in width, and 70 cm in height, and was powered by a 2 HP electric motor, with the forming and sharpening blades operating at 1,400 rpm. Based on the test results, after the shredding blades were formed and sharpened, the cutting torque was reduced from 14.85 N·m to 7.36 N·m. Other observations showed that there was an average increase in cutting performance of 50.30% after the blade forming and sharpening process was performed.
Analisa Optimasi Parameter Sudut terhadap Reduksi Infeed stuck Empty Can pada Multi to single Conveyor di PT XYZ Lusiana Wati; Muchamad Malik; Wardatul Jannah
JURNAL CRANKSHAFT Vol. 9 No. 2 (2026): Jurnal Crankshaft Vol. 9 No. 2 (2026)
Publisher : Badan Penerbit Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24176/cra.v9i2.17393

Abstract

Efisiensi sistem conveyor merupakan faktor penting dalam menjaga kelancaran aliran material pada industri minuman. Namun, konfigurasi multi to single conveyor sering mengalami infeed stuck yang berdampak pada peningkatan downtime. Penelitian ini bertujuan untuk menganalisis pengaruh variasi sudut side guard terhadap kejadian infeed stuck pada proses transfer empty can dengan menggunakan pendekatan Overall Equipment Effectiveness (OEE). Hasil pengamatan awal menunjukkan bahwa sudut side guard sebesar 3° menyebabkan tingginya waktu infeed stuck mencapai 128 menit, sehingga menghasilkan nilai OEE yang rendah, yaitu 55,16%, serta performa lini yang tidak stabil. Optimasi sudut menjadi 1,91° terbukti mampu menurunkan infeed stuck sebesar 40,6% menjadi 76 menit, meningkatkan output produksi, menurunkan jumlah produk reject, dan menghasilkan nilai OEE sebesar 83,68%. Temuan ini menegaskan bahwa pengaturan sudut side guard merupakan parameter mekanis yang sangat krusial dalam meminimalkan gangguan aliran, meningkatkan stabilitas perpindahan material, serta mengoptimalkan efektivitas operasionalpada lini produksi berbasis conveyor.
Analisis Pengaruh Variasi Beban Terhadap Energi dan Eksergi Pada Heat Recovery Steam Generator di Blok 2 PLTGU Muara Karang Della Kumalaningrum; Novix Jefri Al Fama; Imaduddien Ariefa
JURNAL CRANKSHAFT Vol. 9 No. 2 (2026): Jurnal Crankshaft Vol. 9 No. 2 (2026)
Publisher : Badan Penerbit Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24176/cra.v9i2.17397

Abstract

Pada suatu sistem Pembangkit Listrik Tenaga Gas Uap (PLTGU) untuk meningkatkan suatu performa dari suatu pembangkit dapat dilakukan dengan menggunakan analisis energi dan eksergi. Analisis eksergi menggunakan konservasi massa berdasarkan Hukum II Termodinamika dimana proses termodinamika tidak selalu ideal dan terjadi penurunan kualitas energi. Metode analisis eksergi (analisis kemanfaatan) sangat tepat digunakan untuk mendorong tercapainya penggunaan sumber daya energi dengan lebih efektif karena eksergi memungkinkan untuk menentukan lokasi, penyebab, dan besar sebenarnya dari kerugian atau pemborosan suatu sistem termal yang dipengaruhi entalpi, entropi, suhu, dan tekanan. Pada penelitian ini dilakukan analisis energi dan eksergi pada Heat Recovery Steam Generator (HRSG) dengan menggunakan variasi beban. Hasil penelitian menunjukkan berapa besar kerugian atau kehilangan panas yang dihasilkan pada sub-komponen HRSG. Efisiensi energi dan efisiensi eksergi yang dihasilkan berbanding lurus dengan beban yang dihasilkan turbin gas. Pada beban 134 MW, 213 MW, dan 236 MW berturut-turut diperoleh efisiensi energia sebesar 72,7%; 75,7%; 76,7% dan efisiensi eksergi 55,3%: 59,2%; 64,1%.
ANALISIS MEDIA PENDINGIN TERHADAP KETANGGUHAN DAN STRUKTUR MIKRO MATERIAL BAJAST 37 PADA PENGELASAN MIG DENGAN METODE ANOVA Risa Lasarus; Christof Geraldi Simon; Formanto Paliling
JURNAL CRANKSHAFT Vol. 9 No. 2 (2026): Jurnal Crankshaft Vol. 9 No. 2 (2026)
Publisher : Badan Penerbit Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24176/cra.v9i2.17419

Abstract

Baja ST 37 merupakan material yang banyak digunakan pada bidang konstruksi dan manufaktur karena memiliki kemampuan las yang baik. Namun, proses pengelasan Metal Inert Gas (MIG) dapat menyebabkan perubahan struktur mikro dan sifat mekanik akibat perbedaan laju pendinginan setelah pengelasan. Variasi media pendingin berpotensi memengaruhi ketangguhan material sehingga perlu dilakukan penelitian untuk mengetahui pengaruhnya terhadap baja ST 37. Penelitian ini bertujuan menganalisis pengaruh variasi media pendingin terhadap ketangguhan dan struktur mikro baja ST 37 hasil pengelasan MIG menggunakan analisis One-Way ANOVA. Material yang digunakan adalah baja ST 37 dengan kawat las ER70S-6 berdiameter 0,6 mm . Variasi media pendingin yang digunakan meliputi perlakuan normal, air garam, air mineral , dan radiator coolant. Pengujian dilakukan menggunakan metode impact Charpy dan pengamatan struktur mikro. Hasil penelitian menunjukkan bahwa variasi media pendingin berpengaruh signifikan terhadap ketangguhan baja ST 37 dengan nilai Fhitung sebesar 37,46 yang lebih besar daripada Ftabel sebesar 4,07 pada taraf signifikansi 5%. Nilai ketangguhan tertinggi diperoleh pada perlakuan normal sebesar 2,91 J/mm², diikuti radiator coolant sebesar 2,25 J/mm², air mineral sebesar 1,92 J/mm², dan air garam sebesar 1,52 J/mm². Hasil pengamatan struktur mikro menunjukkan bahwa variasi media pendingin memengaruhi pembentukan ferrite dan pearlite pada baja ST 37. Dengan demikian, pemilihan media pendingin setelah pengelasan MIG berpengaruh terhadap ketangguhan dan struktur mikro baja ST 37.
PEMODELAN SISTEM AKTUATOR PNEUMATIK UNTUK PENGENDALIAN FLEKSIBILITAS BODI KENDARAAN Christof Geraldi Simon; Formanto Paliling; Risa Lasarus; Yusri Anugerah Manapa Ambabunga; Simon Ka'ka; Festo Andre Hardinsi
JURNAL CRANKSHAFT Vol. 9 No. 2 (2026): Jurnal Crankshaft Vol. 9 No. 2 (2026)
Publisher : Badan Penerbit Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24176/cra.v9i2.17420

Abstract

This research aims to develop a flexible vehicle body system based on pneumatic actuators to increase the dimensions of limited parking spaces. The methods used include system modeling, electropneumatic control array design, simulation using FluidSIM, and experimental prototype implementation and testing. The control system is designed using a 5/2 directional valve with dual solenoid actuation (Y1 and Y2) that regulates the flow of pressurized air into the pneumatic cylinder to produce a translational motion of the piston that changes the length of the vehicle body linearly Modeling is focused on the relationship between control inputs, actuator response, and structural dimensional changes. Simulations are performed to validate the control logic and response characteristics prior to physical implementation. A length flexibility target of 300 mm is set as a design parameter to meet the parking needs of tight spaces. The test results showed that the system was able to change the length of the vehicle body from 2340 mm to 2040 mm, resulting in a range of flexibility of 300 mm according to the target. These findings show that the proposed method is effective in producing a controlled and applicative adaptive body mechanism, and has the potential to be an engineering solution to improve the efficiency of parking space utilization in land-limited environments.

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