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I Gede Bawa Susana
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INDONESIA
Energy, Materials and Product Design
Published by Jurusan Teknik Mesin dan Industri, Fakultas Teknik, Universitas Mataram
ISSN : 29646987     EISSN : 29646987     DOI : https://doi.org/10.29303/empd.v5n1
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Energy, Materials, and Product Design is an open-access journal published by the Department of Mechanical and Industrial Engineering, Faculty of Engineering, University of Mataram, Mataram, West Nusa Tenggara, Indonesia. Articles approved and published in the journal are accessible to the public at https://journal.unram.ac.id/index.php/empd/index. Energy, Materials, and Product Design is a platform for publishing research results, case studies, and reviews related to mechanical engineering and its relationship to industrial engineering, such as heat exchangers, energy conversion (including solar, wind, ocean, and biomass), heat storage, materials and components (including manufacturing and metallurgy), electric vehicles or their components, and ergonomics applications in tool and workstation design, occupational health and safety (OHS), productivity, production and manufacturing systems, work design and reliability, material handling, optimization and simulation, quality control, and quality engineering. Articles can be written in Indonesian and English according to the Energy, Materials and Product Design journal guidelines.
Arjuna Subject : -
Articles 52 Documents
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ANALISIS SISTEM ANTRIAN TIKET TRANS JOGJA DI TERMINAL JOMBOR YOGYAKARTA Maharsa Pradityatama; Pramudi Arsiwi; Dony Satriyo Nugroho
Energy, Materials and Product Design Vol. 5 No. 1 (2026): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin dan Industri, Fakultas Teknik, Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/empd.v5n1.354-361

Abstract

This study analyzes and simulates the ticket queue system of the Trans Jogja Bus Rapid Transit (BRT) at Jombor Terminal, Yogyakarta. Increasing passenger mobility and the growing demand for public transportation services have contributed to queue congestion during peak operating hours. The queue system operates using a single-channel single-phase model with a First Come First Served (FCFS) discipline. This research aims to evaluate the performance of the existing queue system and validate the simulation model using the trace-driven method. Data were collected through direct observation of 300 passengers, including arrival time and service time data. The simulation process was conducted using the Linear Congruential Generator (LCG) method and analyzed using the Mann-Whitney statistical test. The results show that the simulation model successfully represents the real system, with a service time error of only 0.13% and an arrival time error of 1.58%. Furthermore, the Mann-Whitney test indicates no significant difference between the simulation and the actual system, with probability values greater than α = 0.1. The findings demonstrate that the trace-driven simulation method is effective for modeling queue systems and can be used to support queue service improvement strategies at Trans Jogja shelters.
THE HYBRID SPOT WELDING – EPOXY BONDING PROCESS FOR AISI 1008 STEEL: THE EFFECT OF EPOXY ADHESIVE TYPE Paryanto Dwi Setyawan; I W. Ogie Sabaniartha; Andi Maulana; Sugiman; Sujita; Suteja
Energy, Materials and Product Design Vol. 5 No. 1 (2026): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin dan Industri, Fakultas Teknik, Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/empd.v5n1.362-375

Abstract

Hybrid joining technologies are increasingly being explored to overcome the mechanical and durability limitations associated with conventional resistance spot welding (RSW) and adhesive bonding in lightweight steel structures. However, despite the growing interest in spot welding–epoxy bonding (SWEB), the combined influence of adhesive curing behavior and welding thermal input on joint integrity and microstructural evolution remains insufficiently understood. In this work, a comprehensive experimental study was conducted on 0.8 mm AISI 1008 steel sheets joined using three commercial epoxy systems with different curing characteristics, combined with varying welding currents (50–80 A) and welding times (10–20 s). The investigation integrated mechanical shear testing with metallographic and compositional analyses to establish direct correlations between process parameters, microstructural transformations, and failure behavior. The findings reveal that the hybrid joints exhibit a synergistic load-transfer mechanism capable of significantly improving joint strength and energy absorption compared with conventional spot welds. Superior performance was consistently obtained using slow-curing epoxy under moderate welding conditions (~60–70 A and ~15 s), where a more stable interfacial interaction was achieved. In addition, localized carbon enrichment within the weld nugget, attributed to epoxy pyrolysis during welding, was identified as a previously underexplored phenomenon influencing joint behavior. The study provides new insight into thermo-chemical coupling in SWEB systems and proposes a practical pathway for tailoring hybrid joining performance through integrated process design.

Page 6 of 6 | Total Record : 52

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