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Jurnal Engine: Energi, Manufaktur, dan Material
Published by Universitas Proklamasi 45 Yogyakarta
ISSN : 25797433     EISSN : 25797433     DOI : http://dx.doi.org/10.30588/jeemm
Core Subject : Science, Engineering,
Control & Systems Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
Jurnal Engine: Energi, Manufaktur, dan Material is registered with ISSN 2579-7433 (online) on The Indonesian Institute of Sciences (LIPI). This journal is under publishment of the Mechanical Engineering Department, Universitas Proklamasi 45 Yogyakarta. It is a scientific journal focusing on Energy, Manufacturing, Material, Mechanical, and Software Simulation. It provides a publishing platform for scientists and academicians to share, publish, and discuss all aspects of the latest outstanding development in the field of Mechanical Engineering.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 172 Documents
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Analisis Kinerja Sistem Transmisi Hidrolik pada Prototipe Excavator Model Crawler Dewi Nursari; Sriyono; Tatang Permana
Jurnal Engine: Energi, Manufaktur, dan Material Vol. 10 No. 1 (2026)
Publisher : Universitas Proklamasi 45

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30588/jeemm.v10i1.2732

Abstract

The hydraulic transmission system is a key component of an excavator because it transfers fluid power from the pump to the actuators to produce working movements of the boom, arm, and bucket. This study aims to analyze the performance of the hydraulic transmission system in a crawler-type miniature excavator prototype based on working load, cylinder cross-sectional area, working pressure, cylinder speed, flow rate, and pump requirement. The research used a Research and Development (R&D) method with limited stages of define, design, development, and disseminate. The prototype was designed using CAD software, manufactured through 3D printing with PLA+ material, and equipped with a simple hydraulic system to operate the boom, arm, and bucket cylinders. The analysis was conducted by determining load distribution based on the center of gravity, calculating the force acting on each cylinder, and determining the cylinder area, working pressure, and actuator flow rate. The results showed that the boom cylinder received the highest load of 20 kg, while the arm and bucket cylinders received 10 kg and 5 kg, respectively. The boom cylinder area was 0.000314 m², while the arm and bucket cylinder areas were 0.000491 m². The required working pressures for the boom, arm, and bucket cylinders were 72 bar, 30 bar, and 20 bar, with flow rates of 0.565 lpm, 1.470 lpm, and 2.063 lpm, respectively. These results indicate that the boom cylinder is the most critical component based on pressure requirement, while the bucket cylinder determines the highest flow demand. Therefore, pump selection should consider a maximum pressure of 72 bar and a minimum flow rate of 2.063 lpm, with additional flow capacity when multiple actuators operate simultaneously.
Pengaruh Fraksi Volume Serat terhadap Kekuatan Tarik Serat Daun Nanas dan Serbuk Cangkang Kerang Dengan Matrik Resin Epoxy Fernanda Aditya; Sutrisno; Wahidin Nuriana; Muhammad Hasan Basri
Jurnal Engine: Energi, Manufaktur, dan Material Vol. 10 No. 1 (2026)
Publisher : Universitas Proklamasi 45

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30588/jeemm.v10i1.2734

Abstract

Natural fiber reinforced composite materials are increasingly being developed as an alternative to metal due to their lightweight, strong, and environmentally friendly properties. This study used pineapple leaf fiber and shell powder with an epoxy matrix to determine the optimal composition to improve the tensile properties of the composite. The purpose of this study was to determine how much fiber influences the tensile strength of pineapple leaf fiber and shell powder with an epoxy resin matrix. Specimens were made using the hand lay-up method and alkalization treatment, with a fixed composition of 60% epoxy, while the content of pineapple leaf fiber and shell powder varied from 10%; 15%; 20%; 25%; 30%. Tensile tests were carried out in accordance with ASTM D638. The results showed that the composition of 60% epoxy, 25% pineapple leaf fiber, and 15% shell powder produced the highest tensile strength of 20.80 MPa and the highest elastic modulus of 2029.4 MPa, while the highest strain value of 0.0228 was obtained in the composition of 60% epoxy, 15% pineapple leaf fiber, and 25% shell powder. In general, pineapple leaf fiber contributes to increasing tensile strength, while shell powder increases material stiffness through a more even stress distribution.

Page 18 of 18 | Total Record : 172

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