cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Tulus Burhannudin Sitorus
Contact Email
jurnaldinamis@gmail.com
Phone
+6281361719718
Journal Mail Official
jurnaldinamis@gmail.com
Editorial Address
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
Location
Unknown,
Unknown
INDONESIA
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 246 Documents
 20   21   22   23   24 
THE ROLE OF CU ELEMENT AND COMPACTION PRESSURE ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF AL-CU BINARY ALLOY SYNTHESIZED BY POWDER METALLURGY Suprianto; Muhammad Ramadhan; Almi Syafroza; Farida Ariani
DINAMIS Vol. 11 No. 1 (2023): Dinamis
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/dinamis.v11i1.11940

Abstract

Al-Cu alloys are promising material for engineering field due to their good mechanical properties. These characteristics could be obtained by addition of some elements and correct selected processes parameter. The purposes of this current study to investigate the effect of Cu contents and compaction pressure on microstructure evolution and mechanical properties of the Al-Cu alloy synthesized by powder metallurgy route. High purity Al and Cu elements are used as starting material with composition (21.0, 24.0, 27.0, 30.0, and 33.0) wt.%Cu with 210 MPa of compaction pressure. The varying compaction pressure 160, 180 and 180 MPa were carried for 15 minute holding time. Furthermore, a conventional sintering at 500oC for 1 hour holding time take place. The hardness test resulted that the increases of Cu contents was successfully improved the hardness, which is the maximum hardness 53.2 HV and 71.47 MPa of the compressive strength obtained by 33wt. Cu addition. On the other hand, the varying of compaction pressure resulted the maximum hardness and compressive strength are 25.6 HV and 60.8 MPa respectively for 200 MPa. The microstructure observation shows the increases of Cu promoted more Cu elements dispersed between the aluminum rinh matrix. The increase of compressive strength is encourages finer Al-Cu grain in the microstructure.
ENERGY ABSORPTION AND DEFORMATION PATTERN ANALYSIS OF CRASH BOX WITH TAPERED WALL ANGLE AND TRIGGER CIRCLES UNDER QUASI-STATIC LOADING M. Sabri; Otniel Wahana Christian Simanjuntak
DINAMIS Vol. 11 No. 1 (2023): Dinamis
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/dinamis.v11i1.12156

Abstract

Crash box merupakan sistem keselamatan pasif yang digunakan untuk mengurangi tingkat keparahan kecelakaan yang dialami penumpang atau bagian kendaraan yang vital akibat tabrakan. Penelitian ini meninjau pengaruh variasi sudut tirus dinding dan trigger circles pada crash box berpenampang lingkaran (circular) terhadap penyerapan energi dan pola deformasi pada uji simulasi pembebanan quasi-static. Penelitian dilakukan dengan software berbasis Finite Element Method (FEM). Variasi yang digunakan dalam penelitian ini yaitu crash box dengan sudut tirus 1° dan 5,7° dan letak trigger circles A, B, C dan D dengan material crash box Aluminium 6061-T4. Dari hasil penelitian diperoleh bahwa pola deformasi yang terbentuk adalah pola aksial dengan mode campuran (concertina + diamond). Deformasi mode campuran terjadi pada crash box sudut tirus 1° dan 5,7°. Penyerapan dengan kemampuan menyerap energi terbesar pada crash box dengan sudut tirus (α) 5,7° sebesar 3124,0 J.
ANALYSIS OF RIVER CLEANING SHIP DESIGN USING THE TRASHER BOAT IDEA USING MAXSURF: - Sinamoi, Syamsuri Alpha Joshua; Sabri, Muhammad
DINAMIS Vol. 11 No. 1 (2023): Dinamis
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/dinamis.v11i1.12486

Abstract

Ships are a means of transportation for moving materials and goods from one place to another. Along with this increase, it was also followed by the development of other industries so that it had an impact. However, in increasing these activities, in addition to generating benefits, it also creates new impacts through the waste produced. Several work boats are made to solve problems related to the type of work according to needs. The solution that can be used to overcome the accumulation of garbage in the river is to use the help of a Trash Skimmer Boat. This work boat is a type of special ship that is used to carry out waste collection in rivers, lakes, seas and canals. By using the help of Maxsurf Software, the main size is L = 100 cm, B = 30 cm H = 15 cm, T = 3.54 cm with a payload capacity of 3 kg. It has the following data: Displacement = 6,968 kg ; block coefficient (Cb) = 0.387; Prismatic Coef (Cp) = 0.832. Keyword : Ship, Workboat, Trasher boat, Trash Skimmer Boat
DESIGN OF AUTOMATIC SLIDING DOOR BASED ON ARDUINO USING ULTRASONIC SENSORS AS A PREVENTATIVE THE SPREAD OF COVID-19 Sidik Susilo; Erny Listijorini; Fikri Ardiansyah; Ula, Shofiatul Ula
DINAMIS Vol. 11 No. 1 (2023): Dinamis
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/dinamis.v11i1.12610

Abstract

Covid-19 is an infectious disease caused by acute respiratory syndrome coronavirus 2 (Sars-CoV-2), therefore a study is conducted to break the chain the spread of the coronavirus is a touchless automatic door. In this study, an automatic door is made, and this door uses an Arduino-based ultrasonic sensor. This research aims to be able to design and build sliding doors for automatic doors and can create an Arduino system that is suitable for automatic doors and can use ultrasonic sensors as a touchless medium. This research uses tools and materials, namely Arduino Uno, ultrasonic sensor, dc motor, l298n motor driver, and for the driving mechanism is a dc motor connected to the pinion sprocket and a chain connected to the door surface. This research designs doors in SolidWorks 2018 software and builds doors with specifications (Material: PVC, Height: 1900 mm, Width: 610 mm, Thickness: 40 mm, Mass: 7.5 kg, Weight: 73.5 N) in a street workshop in Leuweung Sawo Cilegon-Banten, as well as making an Arduino system for doors that can move automatically by making a coding program in the Arduino IDE software, for opening and closing the door with an ultrasonic sensor that is set at a distance of about 5 cm..
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.
Modification of Cyclone Separator Based on IOT Arduino Microcontroller with Activated Carbon from Cocoa Shell Waste as a Tool for Controlling Air Pollution Thoriq; Hendra Sahputra Ginting, Muhammad; Fiki Agustianda; Fauziah Khairunnisa; Izharul Haq; Siregar, Afrylian Fauzan; Nasution, Juan Akmal
DINAMIS Vol. 12 No. 1 (2024): Dinamis
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/dinamis.v12i1.15884

Abstract

Air pollution is the condition of air that is contaminated by the presence of materials, substances or polluting components. One of the causes of air pollution is the combustion or inseneration process because the residue of the process can be released into the air. Based on ISPU, there are five main pollutants, namely: carbon monoxide (CO), sulfur dioxide (SO2), nitrogen oxides (NOX), surface ozone (O3), and dust particles (PM10). This study was conducted to reduce the emission of gases. The use of modified cyclone with adsorbent pipe tube from cocoa husk can increase the efficiency of combustion results with adsorption pipe tube modified cyclone. From the results of the study it was found that emissions from incineration can be controlled with APPU in the form of a cyclone. The use of cyclone alone can reduce NOX and CO levels with a reduction in NOX emissions to 53% and CO to 96%. Both emission reductions are in line with the quality standards. However, the use of adsorption pipe tubes showed better efficiency and effectiveness.
Analysis of The Frame Design of Cracker Sheet Printing and Cutting Machine Using Finite Element Method Simulation Effendi, Riki; Pratama, Rikardo; Qadri, Munzir; Yunus Nasution, Ahmad
DINAMIS Vol. 12 No. 1 (2024): Dinamis
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/dinamis.v12i1.16359

Abstract

The food industry continues to evolve and faces challenges in enhancing production efficiency. One product that has garnered significant attention is crackers, which have high global demand. Manual processes involved in printing and cutting cracker sheets result in time and labor wastage, leading to production limitations and reducing the industry's competitiveness. Therefore, this research aims to analyze the design framework of a cracker sheet printing and cutting machine using finite element method simulation. The research methodology involves 3D modeling of the machine framework, selection of appropriate materials, and configuration of finite element method simulation to understand the structural behavior of the machine. The research findings identify critical areas requiring design improvements to enhance machine reliability and operational efficiency. By leveraging automatic cutting technology, this research is expected to enhance cracker production efficiency, reduce production costs, and improve the competitiveness of local food industries in the global market. Using cracker sheet printing and cutting machines, cracker production can be significantly enhanced compared to manual processes. These findings make a significant contribution to improving production efficiency and the competitiveness of the food industry.

Page 22 of 25 | Total Record : 246

 20   21   22   23   24 

Filter by Year

2014 2025


Reset
Filter By Issues
All Issue Vol. 13 No. 2 (2025): Dinamis : In Press Vol. 13 No. 1 (2025): Dinamis Vol. 12 No. 2 (2024): Dinamis Vol. 12 No. 1 (2024): Dinamis Vol. 11 No. 2 (2023): Dinamis Vol. 11 No. 1 (2023): Dinamis Vol. 10 No. 2 (2022): Dinamis Vol. 10 No. 1 (2022): Dinamis Vol. 9 No. 2 (2021): Dinamis Vol. 9 No. 1 (2021): Dinamis Vol. 8 No. 2 (2020): Dinamis Vol. 8 No. 1 (2020): Dinamis Vol. 7 No. 4 (2019): Dinamis Vol. 7 No. 3 (2019): Dinamis Vol. 7 No. 2 (2019): Dinamis Vol. 7 No. 1 (2019): Dinamis Vol. 6 No. 4 (2018): Dinamis Vol. 6 No. 3 (2018): Dinamis Vol. 6 No. 2 (2018): Dinamis Vol. 6 No. 1 (2018): Dinamis Vol. 5 No. 4 (2017): Dinamis Vol. 5 No. 3 (2017): Dinamis Vol. 5 No. 2 (2017): Dinamis Vol. 5 No. 1 (2017): Dinamis Vol. 4 No. 4 (2016): Dinamis Vol. 4 No. 3 (2016): Dinamis Vol. 4 No. 2 (2016): Dinamis Vol. 4 No. 1 (2016): Dinamis Vol. 3 No. 4 (2015): Dinamis Vol. 3 No. 3 (2015): Dinamis Vol. 3 No. 2 (2015): Dinamis Vol. 3 No. 1 (2015): Dinamis Vol. 2 No. 1 (2014): Dinamis More Issue