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INDONESIA
Journal of Energy, Mechanical, Material and Manufacturing Engineering
Published by Universitas Muhammadiyah Malang
ISSN : 25416332     EISSN : 25484281     DOI : -
Core Subject : Engineering,
Mechanical Engineering
Journal of Energy, Mechanical, Material and Manufacturing Engineering Scientific (JEMMME) is a scientific journal in the area of renewable energy, mechanical engineering, advanced material, dan manufacturing engineering. We are committing to invite academicians and scientiests for sharing ideas, knowledges, and experiences in our online publishing for free of charge. It would be our pleasure to accept your manuscripts submission to our journal site.
Arjuna Subject : -
Articles 6 Documents
 1 
Search results for , issue "Vol. 7 No. 2 (2022)" : 6 Documents clear
The impact strength of composite with Abaća (Musa textilis) fiber Muhammad Alif Akbar; Heni Hendaryati; Mohamad Irkham Mamungkas
Journal of Energy, Mechanical, Material, and Manufacturing Engineering Vol. 7 No. 2 (2022)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v7i2.25511

Abstract

Materials are growing day by day, one of the most widely used materials is composite material, a composite is a material formed from a mixture of two or more forming materials through an inhomogeneous mixture, where the mechanical properties of each forming material are different. The focus of this research is to utilize abaca fiber to be used as a composite material using a polyester matrix. The manufacturing method used is the vacuum infusion method. The purpose of this study was to determine the impact strength of composites with chopped and intact banana fiber filler with a weight fraction of 10%, 20% and 30%. The highest impact value in this study obtained an average impact value of 0.523 Joule/mm2 at 30% weight fraction variation with chopped fiber, while the lowest value got an average impact value of 0.071 Joule/mm2 at 30% weight fraction with intact fiber. This shows that the 2 variations in weight and shape of the fiber with abaca fiber filler based on this research affect the value of impact strength.
Design of bionic prosthetic leg Aldiansyah Wahyu Pratama; Daryono Daryono; Mulyono Mulyono
Journal of Energy, Mechanical, Material, and Manufacturing Engineering Vol. 7 No. 2 (2022)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v7i2.21312

Abstract

Along with the increase in the number of Indonesian people who are physically disabled and the number of cases of leg amputations above the knee, the need for prosthetic limbs in Indonesia is also increasing. Prosthetic limbs are tools to replace lost limbs caused by birth defects, amputations, or disease. The bionic prosthetic leg has a long-term useful purpose, as well as supporting the rights of people with disabilities. The device helps the above-the-knee amputee. To design a bionic prosthetic leg, a biomechanical analysis of work is needed to obtain a walking pattern in humans and an analysis of the structure and working material to obtain a safe and comfortable material for use in a bionic prosthetic foot. This bionic leg prosthetic uses an automatic system using an Electromyography (EMG) sensor as a signal picker for the muscles, Arduino Mega 2560 as an input signal processor which is then converted into an output signal and Planetary gear as a knee joint transmission so that the body does not fall forward or backward. The results of the analysis using Autodesk Inventor software on the prosthetic of the bionic leg can withstand a pressure of 404.526 MPa, withstand a reaction force of 354.576 N and a reaction moment of 15.4073 N. So based on the results of the bionic prosthetic leg is very safe and comfortable when used on people with disabilities.
Prototype of the chopping machine for the fronds and leaves of oil palms Bayu Susilo; Anis Siti Nurrohkayati; Sigiet Haryo Pranoto; Andi Nugroho
Journal of Energy, Mechanical, Material, and Manufacturing Engineering Vol. 7 No. 2 (2022)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v7i2.25512

Abstract

Oil palm waste is the residue from the main product of the oil palm tree that is not utilized. Oil palm can produce solid waste in the form of stems, empty fruit bunches, shells, fiber (coir), and fronds. One oil palm tree can produce 40 to 50 fronds within one year. Oil palm fronds are obtained from the rest of the crop and when caring for the tree. This research aims to make and test a prototype chopper machine to utilize and reduce the waste of palm fronds and leaves. The driving motor on this prototype uses a 2 hp electric motor with 1450 rpm rotation, pulley 1, which is on a 4-inch electric motor, and pulley 2, which is on a 6-inch blade shaft, so there are 2 v-belts used with a size B-55. Calculations made during the design process of the prototype counter machine for palm fronds and leaves are Circumferential Speed of Pully, Circumferential Force of Pully, Belt Tension, Maximum Belt Tension, Number of Belt Rotations, Number of Belts, Belt Age and calculation of speed and torque on the blade shaft. The chopped ingredients are fresh or wet palm fronds and leaves. The count produced by the prototype is 206 kg/hour with an average of 5 repetitions. For prototype yield, the average yield produced from 5 replications was 94.41%, and the resulting chopped results were 20-40 mm long.
Effect of depth of cut (DOC) and degree of serrations (DOS) on surface roughness of aluminum 6061 Muhammad Sukroni; Heni Hendaryati; Iis Siti Aisyah
Journal of Energy, Mechanical, Material, and Manufacturing Engineering Vol. 7 No. 2 (2022)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v7i2.25513

Abstract

This study aims to determine the variation of the depth of cut (DOC) on the surface roughness and serration gram (DOS) in the 6061 aluminum turning process using medium speed. In this study the infeed depths used were 0.5 mm, 1 mm, 1.5 mm, and 2 mm by testing the surface roughness using a roughness tester, and testing the teeth gram (DOS) using the SEM (Scaning Electron Microscope) tester. The value of surface roughness (surface roughness) in relation to the depth of cut (DOC) in 6061 aluminum material using a conventional lathe has increased, while the value of the dentition gram (DOS) to the depth of cut (DOC) in the aluminum 6061 lathe process at a depth of 0.5 mm figure shows the percentage of DOS 31.8 percent then continues to decrease with increasing depth of ingestion on the lathe. Based on the research results, the increase in the surface roughness value was due to heat generation which resulted in damage to the chisel resulting in high surface roughness. In addition, variations in the depth of cut gave a negative effect by showing a decrease in the number of serrations in grams, which made it difficult to break and would result in eye damage. chisel
A CFD analysis of NACA 0015 airfoil as a horizontal stabilizer with gap length variations Gunawan Nugroho; Herman Sasongko; Mohammad Adenan; Sarwono; Heru Mirmanto
Journal of Energy, Mechanical, Material, and Manufacturing Engineering Vol. 7 No. 2 (2022)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v7i2.26425

Abstract

The horizontal stabilizer is an important device which stabilize in the longitudinal direction is an important device for aviation. It also controls the pitching nose through the variation of elevator deflection angle. This work is to relate the lift coefficient with elevator deflection angle. The applied horizontal stabiliser is a plain flap with the gap length of 1.75%, 2% and 2.25% w.r.t. chord length. Results show that higher elevator deflection angle increases lift coefficient. For the 2 degree angle of attack and 20 degree of elevetor deflection angle, the lift coefficient is 0.93 (gap length 1.75%). Moreover, the lift coefficient is 1.83 for 10 degree horizontal stabiliser (gap length 2%).
Variation of compaction pressure on hardness and wear of motorcycle disc brake pads Alvandi; Khanif Setiyawan; Andi Nugroho; Binyamin
Journal of Energy, Mechanical, Material, and Manufacturing Engineering Vol. 7 No. 2 (2022)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v7i2.27086

Abstract

The reason for this study was to decide the impact of coconut shell powder molecule size on the hardness and wear pace of aluminum epoxy based composites. This study employs four particle size configurations in an experimental approach. Commercial powders with a 100 m molecular size make up the arrangement. The highest and lowest hardness values that were achieved, respectively, were 195 kg/mm2, 198 kg/mm2, and 203 kg. However, the wear rates of 0.85,0.67, and 0.63 are the highest and lowest. Since specimens with a pressure of 203 produce the highest average hardness, it can be deduced that the hardness number shown is proportional to the greater pressure/compression treatment. In contrast, the specific wear value added for the thirst test is influenced by the presence of increased traction as a result of the pressing and compacting treatment.

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