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Tulus Burhannudin Sitorus
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Faculty of Engineering, University of Sumatera Utara J17 Building 3rd Floor Mechanical Engineering Department Jl. Almameter Kampus USU Medan Telp.061-8213250, Fax 061-8213250
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Dinamis
Published by TALENTA PUBLISHER
ISSN : 02167492     EISSN : 28093410     DOI : https://doi.org/10.32734/dinamis
Core Subject : Science, Education, Engineering,
Education Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering Transportation
Focus and Scope Dinamis Journal is a national electronic journal as a means to publish scientific works in Mechanical engineering and other relevant fields. This journal has strengths and focuses on the sub-fields of energy conversion, structural materials and materials engineering, production processes, and maintenance systems which are all part of mechanical engineering science. This journal is managed by the Department of Mechanical Engineering, Faculty of Engineering, University of Sumatera Utara. Scientific works published in the Dinamis Journal are the results of research, both experimental, literature reviews, and simulations and contribute significantly to the development of science and technology. The Dinamis Journal publishes scientific papers in the field of Mechanical engineering related to the following fields of study: Experimental and Computational Mechanical Systems Solar Energy Fuel Cell Noise and Vibration Alloy and Processing
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 4 Documents
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Search results for , issue "Vol. 11 No. 2 (2023): Dinamis" : 4 Documents clear
ANALYSIS OF MAINTENANCE ACTIVITIES ON DRAG CHAIN MACHINES TO OPTIMIZE FAILURE TIME INTERVALS USING RELIABILITY CENTERED MAINTENANCE (RCM) APPROACH Ariani, Farida; Juanda, Rizky Juanda
DINAMIS Vol. 11 No. 2 (2023): Dinamis
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/dinamis.v11i2.13746

Abstract

Drag Chain is a material moving machine whose working method is to deliver material using a continuous dragging method. Drag chain is the optimal choice for cement production, because the chain with conveyor leaves on the right and left side drags along the bottom of the trough to transport the material in a closed state. Under these circumstances the drag chain components will tend to wear out, as the material interacts directly with the chain and can cause problems. This research will explain the maintenance process using the Reliability Centered Maintenance (RCM) approach is a maintenance system which is associated with statistics to find the value of the reliability of a component so that we can prevent failure by a combination of various actions.
EXPOSURE ANALYSIS OF NOISE INTENSITY IN THE MANUFACTURING AREA AT THE JOB TRAINING AND DEVELOPMENT CENTER SERANG Ula, Shofiatul; Listijorini, Erny; Susilo, Sidik; Fakhrizal
DINAMIS Vol. 11 No. 2 (2023): Dinamis
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/dinamis.v11i2.14210

Abstract

Machines in manufacturing areas often cause noise. The noise comes from machine tools such as lathes, milling machines, grinder machines, and other tools that cause sound and vibration so they are prone to causing physical and psychological disorders. This study was to determine and analyze the noise level in three areas and ten points in the manufacturing room of The Job Training and Development Center Serang by the Regulation of the Minister of Manpower and Transmigration of the Republic of Indonesia Number PER.13/MEN/X/2011 with the maximum noise limit that has been set is 85 dBA. As for the results of the ten points, there is a point that exceeds the threshold value, namely at point 6 (85.8) dBA in the lathe area. Every operator in the manufacturing room that has a noise level that exceeds the threshold value must wear personal protective equipment in the form of earplugs or ear muffs that have been provided by the workshop to reduce the noise level.
EFFECT OF WELDING CURRENT ON MECHANICAL PROPERTIES AND MICROSTRUCTURE OF ALUMINIUM AA1135 ALLOYS BY GAS TUNGSTEN ARC WELDING (GTAW) Suherman, Suherman; Abdullah, Ilmi; Suprianto; Darma, Surya; Hendri Budi Kurniyanto
DINAMIS Vol. 11 No. 2 (2023): Dinamis
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/dinamis.v11i2.14334

Abstract

Aluminium alloys have a wide range of applications in the defence and aerospace industry, including for the manufacture of fuel tanks. The welding Current and type of filler metal significantly affect the microstructure formed and the mechanical strength of metal joints. This study aimed to determine the effect of the kind of filler metal (ER5356 filler metal) and welding current (140 amperes, 160 amperes, and 180 amperes) on the mechanical properties and microstructural of aluminium alloys AA1135 by the GTAW welding process. The results showed that the dendrite size increased with increasing welding current. Furthermore, the micro-hardness of the weld metal shows a decreasing trend with increasing welding current. The maximum tensile strength was obtained at a current power of 160 amperes, and all specimens failed at HAZ. The fracture surface of tensile test observations using SEM showed brittle fracture for Er5356 filler metal specimens, while on the fracture surface of the base metal tensile test specimens, it was observed to show ductile fracture. Welding with a current strength of 180 amperes has met the standard acceptance criteria because no cracks were found on the face bend or the root bend specimen
FAILURE ANALYSIS OF BOILER SUPERHEATER PIPE BY MECHANICAL PROPERTIES TESTING AND CORROSION RATE TESTING Cholis, Nur; Yunus Nasution, Ahmad; Ariani, Farida; Pakpahan, Dion
DINAMIS Vol. 11 No. 2 (2023): Dinamis
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/dinamis.v11i2.14347

Abstract

Superheater is a subcritical boiler component that functions to reheat saturated steam at constant working pressure so that it becomes saturated steam. This study aims to (1) analyze failures in superheaters, (2) test mechanical properties of superheater pipe materials, (3) calculate corrosion rates in superheater pipes with weight loss methods, (4) provide preventive maintenance solutions to minimize superheater pipe damage. The method used in this study is a qualitative approach with the type of experimental study. The method of failure analysis in this superheater pipe is by testing mechanical properties, calculating the corrosion rate of the superheater pipe and providing maintenance solutions. The results of this study are (1) the failure that occurs in this superheater pipe is the occurrence of corrosion and leakage, (2) after heat treatment with a temperature of 8500C on the superheater pipe material, the hardness value increases to 148 BHN, the impact value also increases to 43.26 joules and the phase that occurs in this material is ferrite and pearlite which shows the specimen is increasingly tenacious, (3) the corrosion rate that occurs in the superheater pipe is 0.0489 mmpy, (4) the workable maintenance solution is hardening to increase the durability and service life of the superheater pipe. Keywords: Superheater, Noise, Mechanical Properties, Heat treatment.

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