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Hamdan Akbar Notonegoro
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FLYWHEEL : Jurnal Teknik Mesin Untirta
Published by Universitas Sultan Ageng Tirtayasa
ISSN : 24077852     EISSN : 25977083     DOI : https://doi.org/10.36055/fwl.v0i0.
Core Subject : Science, Engineering,
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation
The journal publishes original and (mini)review articles covering the concepts of materials science, mechanics, kinematics, thermodynamics, energy and environment, mechatronics and robotics, fluid mechanics, tribology, cybernetics, industrial engineering and structural analysis. The journal follows new trends and progress proven practice in the mechanical engineering and also in the closely related sciences as are electrical, civil and process engineering, medicine, microbiology, ecology, agriculture, transport systems, aviation, and others, thus creating a unique forum for interdisciplinary or multidisciplinary dialogue.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 243 Documents
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Prediction of The Surface roughening in Austenitic Stainless Steel Thin Foil With Various Grain Based on Heat Treatment Process for 5.0 Technology Application Rafi Nurdwi Raharjo; Abdul Aziz; Agus Pramono; Suryana Suryana; Indah Uswatun Hasanah; Muhammad Fitrullah
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 12, No 1 (2026): April
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v12i1.39901

Abstract

Prediction of The Surface roughening in Austenitic Stainless Steel Thin Foil With Various Grain Based on Heat Treatment Process for 5.0 Technology Application
Simulation Analysis of an Ankle Prosthesis Design Using Shock Absorbers to Support Prayer Movements Winarno, Agil; Suyitno, Suyitno; Mahendra, Raka
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 12, No 1 (2026): April
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v12i1.36328

Abstract

Amputation of the lower limb causes limitations in performing daily activities, including praying (salat), which requires dynamic movements such as standing, bowing, prostrating, and sitting. This study aims to design and manufacture an ankle-foot prosthesis prototype that allows users to perform salat movements normally without removing the prosthesis. The design process was carried out using Computer-Aided Design (CAD) software to create a 3D model and analyze structural strength through Finite Element Analysis (FEA). The prosthesis was made from aluminum A356 material and fabricated using metal casting and machining methods. The simulation results showed that the maximum stress occurred at the upper front part of the ankle, with a value of 15.14 MPa, which is still below the material’s strength limit, indicating that the design is safe. The prototype produced was consistent with the design and capable of supporting dorsiflexion up to 20° and plantarflexion up to 50°, with a shock absorber mechanism that operates smoothly without jerks. Therefore, the designed ankle-foot prosthesis can provide comfort and flexibility for people with disabilities when performing salat.
Supply Chain Management for Pressure Vessel Fabrication Based on Design Pressure and Capacity Specifications Darmawan, Didit; Suharyono, Dedik
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 12, No 1 (2026): April
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v12i1.39756

Abstract

Pressure vessel fabrication requires precise material specifications derived from design pressure and capacity. These specifications guide procurement planning, supplier selection, and inventory management. Material quantity calculation must consider yield factors and nesting efficiency. Supplier selection employs multi criteria weighting with quality as primary requirement due to safety risks. Inventory management faces challenges from large material dimensions, corrosion risks, and high holding costs. Just in time or consignment strategies may suit reliable suppliers. Material traceability systems and complete documentation are mandatory for regulatory certification. Collaboration with suppliers during design phase reduces custom dimension orders. Technology adoption including ERP and blockchain improves supply chain visibility. Performance metrics such as perfect order fulfillment enable continuous improvement.
EFFECT OF ASYMMETRIC CARBON FIBER SKIN LAYER DISTRIBUTION ON THE FLEXURAL STRENGTH OF POLYPROPYLENE HONEYCOMB SANDWICH COMPOSITES Muhammad Nauval Althaaf Lovrien; Muhammad Alfatih Hendrawan
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 12, No 2 (2026): October
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v12i2.41706

Abstract

Advances in energy-efficient vehicle technology require lightweight materials that maintain high structural strength. One developed alternative is a polypropylene honeycomb-based sandwich composite structure reinforced with carbon fiber for monocoque chassis applications. This study aims to analyze the effect of varying the number of carbon fiber layers in the top and bottom skins on bending strength and post-test damage characteristics. Specimens were fabricated using the vacuum infusion method at a pressure of -0.8 bar, employing a polypropylene honeycomb core, 3K twill carbon fiber, and an epoxy matrix. Bending tests were conducted using the three-point bending method in accordance with ASTM D790 on three configuration variations: 5-3, 4-4, and 3-5 (top skin–bottom skin). The results showed that the configuration with 5 layers on the top skin and 3 layers on the bottom skin yielded the highest flexural strength of 15.456 MPa, followed by the 4-4 configuration at 12.469 MPa and the 3-5 configuration at 11.654 MPa. Macroscopic analysis revealed failure mechanisms including bending deformation, delamination, core crushing, matrix cracking, lower skin cracking, and fiber pull-out. It is concluded that increasing carbon fiber layers in the top skin significantly enhances flexural strength and reduces damage to the sandwich composite structure.
DESIGN AND CONSTRUCTION OF ANIMAL FEED PACKAGING MACHINE USING A MANUAL MEASURING AND PRESS SYSTEM WITH VARIABLE SPEED Rizki Ardika Akbar; Bobby Alvian Juliansah; Elisa Sulistyorini
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 12, No 2 (2026): October
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v12i2.41419

Abstract

A packaging machine is a tool that functions to carry out the work of packaging production products in an industrial process. The main purpose of designing this packaging machine is to make the animal feed packaging process faster, more accurate, and more efficient in terms of energy use. The working principle of this packaging machine uses a measuring system that moves back and forth continuously, where the measuring adjusts the volume of the type of animal feed that is packaged, so that the packaging process becomes shorter and more accurate. Therefore, the concept of speed control of an induction motor using Variable Frequency Drive (VFD) can be applied as a control system to adjust the speed of the electric motor according to the needs of the workload. The research method used is experimental research, which is to make a tool and conduct a direct function test to determine the level of measurement accuracy. The test results show that the machine is able to carry out the process of measuring and packaging animal feed more effectively and efficiently. In addition, the use of VFD allows the adjustment of working speed according to production needs, while the press system uses a hand impulse sealer to produce neater packaging and has a better selling value. The machine designed is expected to be a solution for livestock business actors and MSMEs in increasing productivity and quality of animal feed packaging. Keywords: packaging machine, measuring system, hand impulse sealer, induction motor, Variable Frequency Drive (VFD)
STATIC ANALYSIS OF FORCE AND LOAD DISTRIBUTION IN THE WORKING MECHANISM OF A TAKEUCHI TB150C EXCAVATOR Mahendra Maulana; Wijianto Wijianto
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 12, No 2 (2026): October
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v12i2.42932

Abstract

Hydraulic excavators are subjected to external digging resistance and gravitational loads that are transmitted through the bucket, arm, boom, and supporting structure. Understanding this load path is important for identifying the force distribution and critical regions of the working mechanism. This study investigates the force and load distribution in the working mechanism of a Takeuchi TB150C excavator under a quasi-static condition. The analysis combines Free Body Diagram (FBD) modeling, force and moment equilibrium, and equivalent beam analysis. The input data were obtained from field observation, component measurements, technical manuals, and supporting engineering references. The loads considered include component self-weight, material weight, soil resistance, hydraulic cylinder forces, and pin reactions. The results show that the bucket cylinder force required to maintain equilibrium was 27.54 kN. The resultant bucket load used in the equivalent arm analysis was 14.001 kN. For the boom equivalent beam, the calculated vertical reaction and support moment were 85.384 kN and 249.15 kN.m, respectively. The maximum bending moment obtained for the arm was 28.266 kN.m. The load was transmitted sequentially from the soil to the bucket, bucket pin, arm, boom pin, boom, upper structure, swing bearing, undercarriage, and track system. The SFD and BMD results indicate that the boom and arm support regions experience the largest internal actions. Therefore, these regions are identified as the most relevant locations for further stress, deformation, and fatigue investigations. Keywords: excavator, force analysis, load distribution, static analysis, working mechanism.
STRATEGIES FOR MITIGATING STRUCTURAL FAILURE AND OVERLOAD IN CRANE SYSTEMS THROUGH INTERNET OF THINGS (IoT) INTEGRATION: A REVIEW Ravi Fatih Albirri; Yuan Samudra; Muzammil Yusuf; Fuad Fahmi; Muhammad Akmal Ilhamudin; Kaleb Priyanto
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 12, No 2 (2026): October
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v12i2.39964

Abstract

Crane systems are vital components across multiple industrial sectors, including construction, port logistics, and the maritime sector. Crane operations involving heavy load lifting under dynamic working conditions present high risks of structural failure and overload incidents, which can cause workplace accidents and equipment damage. Advances in digital technology, particularly Internet of Things (IoT), Digital Twin, and machine learning, open new avenues for improving monitoring systems and operational risk mitigation in cranes. This study analyzes the effectiveness of integrating these technologies in strengthening structural health monitoring systems and minimizing overload risks in crane operations. The method employed is a Systematic Literature Review (SLR) examining scientific publications from 2021 to 2025, sourced from databases including IEEE Xplore, ScienceDirect, Springer Link, and Google Scholar. Findings indicate that the integration of smart sensors, wireless communication systems such as LoRa, and machine learning-based analytics improves load monitoring accuracy and enables early warning systems against potential structural failure. Digital Twin technology further supports virtual operational simulation to identify overload risks prior to the lifting process. IoT and artificial intelligence integration therefore plays a central role in improving operational safety and maintenance efficiency of crane systems across various industrial sectors
THE EFFECT OF HORN NOISE EXPOSURE ON THE HEALTH AND PERFORMANCE OF MOTOR VEHICLE INSPECTORS Mohammad Nanda Mario; Citra Andini Permatasari; Dimas Maulana Rifki; Ayna Zakiyya; Dwi Abizar Fabiansyah; R. Arief Novianto
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 12, No 2 (2026): October
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v12i2.41181

Abstract

This study aims to analyze the noise level of vehicle horn sounds and evaluate their compliance with hearing health threshold limits. The study employed a comparative descriptive method through direct testing on one unit of a Suzuki Ertiga Hybrid vehicle equipped with a factory-standard horn. The testing was conducted in an outdoor area in front of the vehicle inspection workshop using a Sound Level Meter SL-4010. The vehicle was stationary with the electrical system activated and the engine turned off. Measurements were carried out for 5 seconds in each test with distance variations ranging from 2 to 7 meters, front and side vehicle positions, and microphone height variations from 50 to 150 centimeters.The results showed that the highest noise level at the front position of the vehicle was recorded at a distance of 5 meters, reaching 102.9 dBA, while at the side position, the highest value was 100.5 dBA at the same distance. The highest microphone height measurement was obtained at 130 centimeters with a value of 101.7 dBA. Although the test results still complied with the technical standards based on Government Regulation Number 55 of 2012, the recorded noise levels exceeded the safe hearing health threshold of 85 dBA. This study concludes that exposure to vehicle horn noise has the potential to cause hearing impairment; therefore, an evaluation of vehicle noise technical standards that places greater emphasis on health aspects is necessary.
EFFECT OF PREHEAT TEMPERATURE ON THE MECHANICAL PROPERTIES AND MICROSTRUCTURE OF SMAW-WELDED GRAY CAST IRON USING NICKEL ELECTRODE Abhiraja Ar Raffi; R. Faiz Listyanda; Agung Purnomo
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 12, No 2 (2026): October
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v12i2.44009

Abstract

This study investigates the effect of preheating temperature on the tensile strength, hardness, and microstructural characteristics of FC-25 gray cast iron welded using the Shielded Metal Arc Welding (SMAW) process with a nickel-based electrode. Four preheating conditions were examined: non-preheated, 150°C, 200°C, and 250°C. The specimens were evaluated through tensile testing, Rockwell hardness testing, and microstructural observation at 50× magnification. The results showed that preheating at 200°C produced the highest average tensile strength of 147.39 MPa and the highest elongation of 3.08%. In contrast, the lowest tensile strength and elongation were obtained at 150°C, with values of 82.87 MPa and 1.37%, respectively. The base metal hardness remained constant at 36.47 HRC across all conditions. The highest HAZ hardness was 50.67 HRC under non-preheated conditions, while the lowest was 43.30 HRC at 250°C. Similarly, weld metal hardness decreased from 28.23 HRC without preheating to 20.87 HRC at 250°C. Microstructural observations revealed relatively similar characteristics in the base metal, whereas more noticeable morphological variations occurred in the HAZ and weld metal. Overall, preheating at 200°C provided the highest tensile strength and elongation among the tested conditions, while preheating at 250°C produced the lowest hardness in the HAZ and weld metal.
EFFECTS OF SUPERFICIAL GAS VELOCITY ON LOCALIZED BED-TO-WALL HEAT TRANSFER IN A FULL-LOOP CIRCULATING FLUIDIZED BED: A CFD–DEM INVESTIGATION Hadi Wahyudi; Sri Agustina
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 12, No 2 (2026): October
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v12i2.44065

Abstract

Understanding the relationship between gas–solid hydrodynamics and localized bed-to-wall heat transfer is important for circulating fluidized beds (CFBs). This study investigates the effects of superficial gas velocity on particle redistribution and localized wall heat transfer in a three-dimensional full-loop CFB using computational fluid dynamics coupled with the discrete element method (CFD–DEM). Five velocities (1.5284–3.0105 m/s) were examined at a reported solids inventory of 224.975 kg/m³, with a heated wall at 373 K and initial gas and particle temperatures of 298 K. Predicted axial suspension-density and heat-transfer-coefficient trends were qualitatively compared with published experimental observations. The simulations reproduced characteristic core–annulus circulation and showed that increasing gas velocity promoted more uniform axial particle distributions. Local heat-transfer coefficients generally increased with velocity, but responses varied along the riser. Higher coefficients occurred in the lower region, whereas differences among velocity cases became more pronounced toward the upper heated region. Gas–wall convection and particle-mediated conduction exhibited different local responses. Among resolved particle–wall conductive pathways, non-contact conduction through the intervening gas dominated, while direct contact conduction contributed comparatively little. The study extends the characterization of the spatially dependent hydrodynamic–thermal relationship to a lower superficial gas-velocity range without proposing a new heat-transfer mechanism.

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