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Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin
Published by Universitas Pancasila
ISSN : 20885784     EISSN : 26209675     DOI : -
Core Subject : Science, Engineering,
Automotive Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology
Jurnal Teknobiz dipublikasikan sebanyak 3 (tiga) kali dalam 1 (satu) tahun yaitu pada bulan Maret, Juli dan November. Lingkup Jurnal Teknobiz meliputi bidang energi baru terbarukan, dan manufaktur. Bidang energi baru terbarukan yang dibahas mengenai sistem dan alat teknologi konversi yang mampu mengkonversi sumber energi terbarukan seperti energi tenaga air, tenaga angin, tenaga surya, biomassa, dam lain-lain untuk dapat dimanfaatkan energinya ke bidang sektor yang lain. Bidang manufaktur yang dibahas meliputi bidang material, tribologi, dan lain-lain.
Arjuna Subject : -
Articles 409 Documents
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AERODYNAMIC ANALYSIS OF WIND DEFLECTOR DESIGN ON PICK UP BOX CARS BASED ON CFD Imam Krismunandar; Oktarina Heriyani
Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin Vol. 16 No. 2 (2026): Teknobiz
Publisher : Magister Teknik Mesin Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/my90pk32

Abstract

This study aims to analyze the effect of adding a wind deflector on the aerodynamic performance of a pick-up box truck using the Computational Fluid Dynamics (CFD) method. The primary issue with this type of vehicle is the significant pressure drag caused by the height difference between the cabin and the cargo box. Simulations were conducted using ANSYS Fluent software with the k-epsilon turbulence model on two configurations: a standard model and a model equipped with a wind deflector. The simulation results show that the standard model experiences significant flow separation in the gap between the cabin and the box, resulting in a drag coefficient ($C_d$) of 0.5239 and a drag force ($F_d$) of 2.904 N. Following the application of the wind deflector, the airflow becomes more streamlined and the separation point is minimized, reducing the $C_d$ value to 0.4240 and $F_d$ to 2.347 N. This study concludes that the use of a wind deflector can provide a drag force reduction of 19.19%, indicating a significant improvement in the vehicle's aerodynamic efficiency.
OPTIMIZATION OF SUSPENSION SYSTEM RE-DESIGN ON MINI STRUCTURES BUSES USING SIMULINK FACILITIES Cep Yudi Hamdani; Yohanes Dewanto
Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin Vol. 16 No. 2 (2026): Teknobiz
Publisher : Magister Teknik Mesin Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/th05wh85

Abstract

The construction of the Bogor–Cianjur–Sukabumi (BOCIMI) Toll Road represents a strategic government initiative to enhance regional connectivity in West Java, reduce congestion in the Greater Jakarta (Jabodetabek) area, and promote the growth of industrial zones, tourism, and satellite cities. Along with the development of toll road infrastructure, the demand for public transportation modes that are both efficient and comfortable has become increasingly important. However, existing road-based public transportation still faces limitations, particularly in terms of ride comfort and vehicle dynamic performance. Therefore, the development and re-design of medium buses with improved comfort through suspension system optimization is required. This study focuses on the modeling and optimization of the suspension system of a PO. Marita medium bus operating on the Jakarta–Cianjur route via Puncak Bogor, using Simulink-based simulation as a representation of the vehicle’s dynamic system. The objectives of this research include suspension system modeling, analysis of suspension parameters that most significantly affect vehicle dynamic response, optimization of the main suspension parameters, and evaluation of vibration response before and after optimization based on body acceleration RMS, maximum suspension deflection, settling time, and damping ratio (ζ). In addition, vehicle response under cornering and acceleration conditions with various speed levels and mass distributions is also analyzed. The research methodology was carried out in several stages, including literature review, collection of vehicle and road data, determination of initial suspension parameters, mathematical modeling, Simulink modeling, initial condition simulation, vibration response evaluation, optimization of spring stiffness (k) and damping coefficient (c), and comparison of results before and after re-design. The results show that the suspension system was successfully modeled and was able to quantitatively represent the vehicle’s dynamic response. The parameters k and c were found to be the most influential on suspension performance. Optimization increased the damping ratio from approximately ζ ≈ 0.03 to ζ ≈ 0.07, accompanied by a reduction in body acceleration RMS from about 0.38 m/s² to 0.21 m/s², maximum suspension deflection from ±85 mm to ±50 mm, and settling time from 6.0 seconds to 2.5 seconds. Under cornering and acceleration simulations, the optimized suspension system maintained stable and well-controlled responses, making it more suitable for the mountainous road characteristics of the Jakarta–Cianjur route via Puncak Bogor.
ANALYTICAL STUDY OF BABY BED DESIGN WITH ERGONOMICS AND SAFETY STANDARDS APPROACH Nurkim; Susanto Sudiro
Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin Vol. 16 No. 2 (2026): Teknobiz
Publisher : Magister Teknik Mesin Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/tknhj153

Abstract

This study aims to analyze the design of baby cribs using an ergonomic approach and safety standards to ensure infants’ comfort, safety, and health during sleep. The design of baby cribs is a crucial aspect as it is directly related to infants’ growth and physical development stages. An inappropriate design may pose risks of injury, sleep disturbances, and health problems such as plagiocephaly (flat head syndrome). The research methods include a literature review of existing product designs, analysis of applicable safety standards, interviews with pediatric health experts, and evaluation of commercial products available on the market. The analysis focuses on structural aspects, material selection, product dimensions based on infant anthropometry, and the completeness of safety features. The results indicate that baby crib design must comply with ergonomic principles to support proper infant posture, use safe and non-toxic materials, incorporate sturdy construction with protective systems that minimize the risk of entrapment or falls, and provide adequate ventilation as well as ease of maintenance. Furthermore, the implementation of certified safety standards is an important factor in increasing parents’ trust and sense of security.By integrating ergonomic principles and safety standards, baby crib designs are expected to provide  optimal protection and support healthy sleep quality for infants.
ANALYSIS OF THE EFFECT OF ELECTRODE TYPE VARIATION AND PWHT TEMPERATURE VARIATION ON SMAW WELDING ON THE IMPACT STRENGTH AND BENDING OF ST 42 STEEL Muhammad agung nadjmi nasution; Kisto
Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin Vol. 16 No. 2 (2026): Teknobiz
Publisher : Magister Teknik Mesin Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/bnfdf348

Abstract

ST 42 steel is a medium carbon steel that is widely used in the construction and shipping industries because it has high strength and ability to accept heat treatment. However, the welding process using the Shielded Metal Arc Welding (SMAW) method often causes residual stress that can reduce the quality of the weld joint. To overcome this, Post Weld Heat Treatment (PWHT) is needed to reduce residual stress, refine the microstructure, and improve the mechanical properties of the weld. This study aims to analyze the effect of variations in electrode types (E7016 and E7018) and PWHT temperatures (500°C and 600°C) on the flexural strength and toughness of ST 42 steel weld joints. The welding process was carried out at position 1G, then the specimen was given PWHT for 60 minutes. Testing was carried out using a bending test to assess flexural strength and an impact test to measure the toughness of the joint. The results showed that PWHT had a significant effect on improving mechanical properties. In the bending test, the highest strength was achieved by the E7016 electrode with PWHT 600°C of 940.808 MPa, while the lowest value was shown by the E7018 electrode without PWHT of 572.607 MPa. In the impact test, the highest toughness was obtained by the E7018 electrode with PWHT 600°C of 1.72 J/mm², and the lowest value was found in the E7016 electrode without PWHT of 1.20 J/mm². Thus, PWHT is proven to increase the flexural strength and toughness of the connection, while the electrode selection must be adjusted to the application needs, both for flexural resistance and toughness against dynamic loads..
INFLUENCE OF ELECTRODE TYPE ON THE MECHANICAL PROPERTIES OF THE RESULT AISI 1018 STEEL SMAW WELDING Deny Wakhyudi; Kisto
Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin Vol. 16 No. 2 (2026): Teknobiz
Publisher : Magister Teknik Mesin Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/6swg4257

Abstract

The mechanical and physical characteristics of a welded joint are greatly influenced by the choice of electrode type and the applied current. Therefore, this research was conducted to evaluate the impact of these two variables on specimen performance, which includes macro-micro review, hardness mapping, and tensile strength. Experiments were conducted using the Shielded Metal Arc Welding (SMAW) method on AISI 1018 steel material with a constant welding rate. The test involved three electrode variants (E6013, E7016, and E7018) combined with three current levels (70A, 110A, and 130A). Based on the analysis results, it was proven that the current plays a vital role in changing material properties. An inverse correlation was found: increasing the welding current consistently triggered a decrease in both hardness and tensile strength. Regarding the comparison between electrodes, the most optimal hardness level reached 105 HRB obtained from the combination of the E7018 electrode with a current setting of 70A. On the other hand, the maximum tensile strength was recorded at 34.697 MPa, which was produced through the use of E6013 electrodes at a current strength of 110A.
ANALYSIS CHARACTERISTICS REFUSE DERIVED FUEL (RDF) BRIQUETTES FROM MIXTURE RICE STRAW AND CARDBOARD WASTE WITH VARIATION RATIO MATERIAL AS ENERGY ALTERNATIVE LD Muhammad Raldi; Setia Damayanti; La Ode M. Firman
Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin Vol. 16 No. 2 (2026): Teknobiz
Publisher : Magister Teknik Mesin Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/dft9pq96

Abstract

This study aims to analyze the characteristics of Refuse Derived Fuel (RDF) briquettes produced from a mixture of rice straw waste and cardboard waste with varying composition ratios as an alternative energy source. The research employed a quantitative approach using an experimental method through briquette production and laboratory testing. The composition variations used were 80:20 and 70:30 (straw: cardboard). The parameters analyzed included calorific value, moisture content, ash content, volatile matter, and fixed carbon through proximate and ultimate analysis. The results showed that the 70:30 composition produced the highest calorific value of 2,029.34 kcal/kg compared to 1,742.03 kcal/kg for the 80:20 composition. In addition, the 70:30 composition has lower moisture and ash content, as well as higher volatile matter and fixed carbon. Based on Waste to Energy (WtE) feasibility standards, both variations met the criteria for calorific value, moisture content, and fixed carbon, but did not meet the standards for ash content and volatile matter. Overall, the 70:30 composition demonstrated more optimal performance as a waste-based alternative fuel. This study contributes to the utilization of biomass and solid waste as sustainable energy sources.
PERFORMANCE ANALYSIS OF A THERMOELECTRIC GENERATOR (TEG) INTEGRATED INTO A BIOMASS STOVE USING A CONTINUOUS COOLING SYSTEM Hulam Darojati; Imron Rosyadi; Ni Ketut Caturwati; Hery Try Waloyo
Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin Vol. 16 No. 2 (2026): Teknobiz
Publisher : Magister Teknik Mesin Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/mqm25j26

Abstract

This study aims to analyze the performance of a SP1848-27145 SA Thermoelectric Generator (TEG) integrated into the wall of a biomass stove as a small-scale alternative power generation system. The primary objective is to evaluate the effect of implementing a continuous cooling mechanism on the temperature difference (∆T) and the electrical power output. The research was conducted experimentally by varying three main parameters, namely the cooling method, the mass of wood biomass fuel, and the number of TEG modules. The experimental results indicate that continuous cooling using ice-water as the cooling medium provides the most optimal thermal performance, maintaining the cold-side temperature (Tc) as low as 17°C–21°C and producing a maximum temperature difference (∆T) of 54.07°C. The highest electrical performance was achieved using a configuration of two TEG modules connected in series with a 400 g fuel load and ice-water cooling, generating an output voltage of 2.14 V and electrical power of 0.47 W. This performance is nearly four times higher than that obtained using a single TEG module. Furthermore, the efficiency of the two-module TEG system with ice-water cooling reached 3.63%, which is higher than the efficiency of the two-module configuration without cooling, which was only 2.21%.
DESIGN  OF  500 KG CAPACITY MATERIAL HANDLING TO SUPPORT THE ASSEMBLY PROCESS AT  PT. XYZ USING THE VDI 2221 METHOD Fredericus Prijo Santoso; Aditya Nugraha; Hermawan Budi Prasetyo; Didan Bima Prakosa
Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin Vol. 16 No. 2 (2026): Teknobiz
Publisher : Magister Teknik Mesin Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/bej1r746

Abstract

The design of Material Handling with a Capacity of 500 Kgs to Support the Assembly Process at the Tilting Table of PT XYZ Using the VDI 2221 Method is a development of material handling that was previously used at PT XYZ. This design aims to maximize the material handling mechanism to make it easier for operators during the Towing assembly process on the Tilting Table. Where previously moving the motor compartment, platform, and steering to the total assembly line was still manual using human labor. Therefore, this design maximizes the workings of the material handling by modifying the IWF frame (girder) to be able to move the motor compartment, platform, and steering to the total assembly line easily. The research method used for the Design of Material Handling with a Capacity of 500 Kg to Support the Assembly Process at the Tilting Table of PT Senzo Feinmetal is the VDI (Verein Deutsche Inginieur) 2221 method. The sequence of work to design a design using the VDI 2221 method in general is planning, conceptualizing, designing, and completing. The results of the calculation and analysis in this design are a comparison of the previous design whether the construction structure is in accordance with applicable strength standards. The calculations and analysis that have been carried out by considering the appropriate standards are intended to be able to withstand a maximum load of 500 Kgs.
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Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin Vol. 16 No. 2 (2026): Teknobiz
Publisher : Magister Teknik Mesin Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/vkcvee44

Abstract

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