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All Journal JTTM: Jurnal Terapan Teknik Mesin Automotive Experiences TECHNOLOGIC
Kristianto, Stevanus Brian
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Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Experimental Stress Analysis on Frame Structure of A 70-Passengers Electric Bus Kristianto, Stevanus Brian; Adhitya, Mohammad; Haryanto, Budi; Deprian, Lukyawan Pama; Aziz, Umar Abdul; Dwimansyah, Ridho; Sumarsono, Danardono Agus
Automotive Experiences Vol 8 No 2 (2025)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.13757

Abstract

Structural strength testing of buses using static vertical load has not previously been explored to validate the structural integrity of bus frames. In this study, the static vertical load method was employed to validate the structural strength of the Universitas of Indonesia electric bus, which utilizes two different materials SS400 for the lower frame and Aluminum Alloy 6061 for the upper frame. Finite Element Analysis (FEA) was conducted to identify critical areas on both the lower and upper frames. The stress values in the simulation were also obtained at the same location as the strain gauge placements in the experiment. Experimental vertical load testing was carried out by incrementally applying a load of 1000 kg up to the equivalent of 70 passengers, with an additional dynamic coefficient of 30% resulting in a maximum load of 6850 kg. Strain measurements were taken using 20 strain gauges on the lower frame and 8 on the upper frame. The experimental result showed the highest stress occurred at strain gauge no. 9 on the lower frame, measuring 78.10 MPa, and 15.32 MPa on the upper frame under 6850 kg load. The comparison between the simulation and experimental results reveals an 18% deviation. Nevertheless, both methods indicate the same critical area of the structure. The stress distribution indicated that the central deck area of the lower frame, where passengers sit and stand, experienced the highest loads. On the upper frame, significant stress was observed in the area where the air conditioning system is mounted. These findings demonstrate that static vertical load testing can be effectively used to validate the structural strength and stress distribution of electric buses, particularly in areas subject to concentrated loading.
ANALISA PERBANDINGAN KONSUMSI BAHAN BAKAR DAN TENAGA YANG DIHASILKAN PADA TIAP PUTARAN MESIN DI MESIN TOYOTA K3-VE DENGAN METODE PEMBEBANAN TETAP MENGGUNAKAN DYNO TEST MAHA LPS 3000 Widyartono, Andreas Edi; Kristianto, Stevanus Brian; Deprian, Lukyawan Pama
Technologic Vol 10 No 1 (2019): TECHNOLOGIC
Publisher : LPPM Politeknik Astra

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The consumption of fuel and power produced on an internal combustion engine is one factor to determine the efficiency of a machine. The small amount of fuel consumed will vary, among others, depending on the condition of the load, engine speed and construction of the engine itself. Fuel consumption is different at each engine speed to produce the same torque. In this study, the author will test a machine to prove fuel consumption through a graph of fuel consumption of power produced at each engine speed by using a Toyota Avanza car with a capacity of 1300 cc with a manual transmission as the object of research, a Dynotest Brand Chassis MAHA LPS 3000 made in Germany with a capacity of up to 450 BHP as a testing tool, as well as a Scan Tool as a measuring instrument related to fuel use. Tests will be carried out by giving varying loads to the engine with Dynotest, then measured fuel consumption indirectly through a Pulse Width Modulation signal that is read on each load. Calculations from the test results show that the Toyota Avanza engine with a capacity of 1300cc, shows that the most efficient use of fuel is at 3000 rpm to 4000 rpm.
Design and development of an IoT-based coolant top-up automation system to enhance productivity and cost efficiency in machining prosses Al Faruq, Muhammad Sholih Faiz; Kristianto, Stevanus Brian; Kesawa, I Gusti Nyoman; Purwoko, Yohanes P Agung; Novita Anggraini W; Beny Hermawan; Danang Wahyudi; Yudistara, Selamat
JTTM : Jurnal Terapan Teknik Mesin Vol 7 No 1 (2026): JTTM: Jurnal Terapan Teknik Mesin
Publisher : Teknik Mesin - Universitas Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/jttm.v7i1.2158

Abstract

PT XYZ experiences inefficiencies in the coolant top-up process during machining operations, which is currently performed manually. This method is time-consuming and icreases the risk of damage to cutting tools and machines, therby contributing to higher maintenance costs. To address this issue, a system capable of assisting the coolant top-up process as well as to enable rapid and real-time monitoring the coolant quality and quantity is required in order to prevent tool damage and reduce maintenance cost. Using an 8 Step Methodology, an automatic coolant top-up system for machining processes was developed based on Internet of Things(IoT) technology with real time data acquisition and transmission. Experimental results show that the system improvestime efficiency by 80 %, reduce coolant consumption by 8 %, and increases cutting tool eficiency by for type D (driiling) , 6 % for type IN (tapping) and 20 % for type C (milling). These results demonstrate that the system effectively enhances operational efficiency and reduces costs in machining process. The innovative contribution of this study lies in the integration of low-cost IoT components with a cloud-based spreadsheet platform for real-time monitoring and control, making the system easy to implement, scalable and cost-effective for coolant management in machining operations.
Co-Authors Al Faruq, Muhammad Sholih Faiz Andreas Edi Widyartono Beny Hermawan Budi Haryanto Danang Wahyudi Danardono Agus Sumarsono Deprian, Lukyawan Pama Dwimansyah, Ridho Kesawa, I Gusti Nyoman Mohammad Adhitya, Mohammad Novita Anggraini W Purwoko, Yohanes P Agung Umar Abdul Aziz Yudistara, Selamat