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All Journal Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) Prosiding SNTTM
Afrizal, Efi
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Decision Sciences, Operations Research & Management Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Analisis Performa Alat Planishing Hammer Melalui Metode Elemen Hingga Dan Eksperimen Sugianto, Irwan; Afrizal, Efi; Arief, Dodi Sofyan
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 1 Januari s/d Juni 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Planishing hammer is a tool for plate forming with a utilizing impact force that happened as a result of hammer’s impact. This research was conducted to find the performance of planishing hammer, then do some methods to get value of force that happened. As for the method used are manual calculation, experimental, and simulation. Simulation method was done by Finite Element Method (FEM) concept using commercial software, collusion Abaqus. The experiment performed with metal formed to plate, where at planishing hammer pasted a strain gauge that activated by microcontroller and used Arduino UNO which can be connected directly to a computer to see the stress that happened to hammer. The experiment was conducted to get the maximum force of forwarded from electric motor ¼ HP with principle of power transmission utilizing eccentric shaft for until the plate is deformed. For manual calculation was used mechanism 4 bars, wherein the linear velocity were calculated by analytic methods. Based manual calculation method, the value of  force 2413.86735 N. By experimental method thrice, the value of force are 2748.081 N,  2775.518 N and 2742.478 N, and with simulation the value of force is 2165.961 N. Keywords: Plate, Software, Strain Gauge, Maximum force, Deformation
Aplikasi Pemrograman Metode Elemen Hingga Pada Strukurbeam 2D Menggunakan Program C# Rahman, Soleh; Afrizal, Efi; Nazaruddin, Nazaruddin
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 1 Januari s/d Juni 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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The application of structural analysis is increasingly having a very important role in its existence in today's engineering world. Nowadays there are so many applications that make problem analysis easier, especially in the field of mechanical engineering such as SOLIDWORKS, ANSYS, ABAQUS, INVENTOR and so on. However, these commercial applications are not only quite expensive but also have very strict licensing rules. Of course this raises a kind of concern for users of the application, especially mechanical engineering students at the University of Riau. These problems and reasons are what encourage the author's initiative and ideas to create a structural analysis application that can be used as an alternative for analyzing structural problems. There is no structural analysis application developed previously in the Department of Mechanical Engineering at the University of Riau, so as an initial stage, one of the analyzes that can be developed is a two-dimensional (2D) beam structure analysis that is subject to loading and is in an elastic state using triangular elements. or Constant Strain Element (CST). The development of the application program is based on the Finite Element Method (FEM). From the results of the research that has been done, it can be concluded that the results of calculations in the application that have been developed show the results of the close value after comparisons with the results of calculations on the popular commercial application, namely Abaqus.Keywords: Finite Element Method, structural analysis application, triangular element.
Pengaruh Temperatur Post Weld Heat Treatment (PWHT) Terhadap Sifat Mekanis Material Baja A36 Yang Mengalami Pengelasan Shielded Metal Arc Welding (SMAW) Akhyar, Waldi Naziful; Afrizal, Efi; Fatra, Warman
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 2 Juli s/d Desember 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Some industries involve the welding process at the production stage. Currently in the practice widely used is SMAW (Shielded Metal Arc Welding) due to requires electrical energy as the heat source. In another line, that process produced residual stress since speed of cooling time is diffference between based metal and welded region. In this study, PWHT (Post Weld Heat Treatment) proposes to apply as solution in reduce the effect of residual stress. The method is the welded material reheated on temperature 450oC, 550 oC , and 650 during 1 hour in the furnace and cooled in it. The results showed at the highest heating temperature, elongation of welded material increase 22%, the hardness in the welding region decreased to 160 VHN while in the HAZ area the hardness was an improvement to 140 VHN, and the micro observations showed a structure after PWHT more uniform. It could be concluded that PWHT has succeeded in increasing the ductility of the welded materials. Key words : welded, PWHT, SMAW
Analisis Gaya Pada Alat Bending Roll Menggunakan Metode Elemen Hingga Dan Eksperimental Dian Haryanto; Efi Afrizal; Dodi Sofyan Arief
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 1 Januari s/d Juni 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Bending Roll is a tool used to make curves, which are widely used in the field of construction work. The Bending Rolltool made by Tongam and Aweng (2018) has not been tested. To analyze the performance of the Bending Roll tool using thefinite element method then compared with direct testing. Testing through finite element method Finite element methodsoftware is used, namely Abaqus. That testing directly specimens used there are two types, plate and Hollow. For platespecimens, the rolling process is tested by adding a load using a hydraulic jack and the compressive force measured by thepressure gauge. Whilst Hollow specimens a strain gauge is also used to measure the strain that occurs during rolling. Thegoal is to be able to see the phenomena that occur in the specimen during rolling. The results of the most ideal specimen tobe carried out on a tool is a specimen with a thickness of 3 mm. On the 3 mm plate the stresses are large and can formyoung specimens with a small force. When the force used is small, it will extend the life of the bending roll tool. If calculatedthe level of difference in measurements that occur is not so big between experimental measurements and simulationmeasurements.Key words: Bending Roll, finite element, pressure gauge, strain gauge.
Development of Rotary Fatigue Test Equipment Based on the Joseph Marin Approach Anang Prasetyo; Efi Afrizal; Nazaruddin Nazaruddin
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 67 No 3 (2023): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v67i3.344

Abstract

This paper proposed the development of rotary fatigue test equipment. This equipment was used to test the JIS S45C steel, validated using the Joseph Marin approach. Analyzing the fatigue strength of JIS S45C steel using the Joseph Marin approach was compared to experimental testing. The dimension of the test specimens was based on the ASTM E 466. The test data was displayed in the form of an S-N curve. The test results showed the fatigue strength of JIS S45C steel on the whole that was close to each other, experimentally and using the Joseph Marin approach. In the infinite life region, it is known that the fatigue strength based on the Joseph Marin approach was lower than experimental tests. Therefore, if JIS S45C steel had received a hefty load repeatedly, it would fail more quickly.
Perancangan alat uji roda gigi menggunakan metode VDI 2221 Cupu, Dedi Rosa Putra; Afrizala, Efi; Kalduma, Ibnu
Prosiding SNTTM Vol 21 No 1 (2023): SNTTM XXI Oktober 2023
Publisher : BKS-TM Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71452/r1xmks46

Abstract

The transmission system is vital in automotive and industrial applications, including gears. Gears are the most widely transmission components used to transmit the power and rotational speed from the driver component to others. Power is transmitted by contact rolling between two contacting gear surfaces. The contacting area is relatively tiny enough to transmit very high power, resulting in high pressure on the contact surface of the gears. This causes failure on the gear surface, such as pitting and scuffing. To investigate the failures and their causes, a gear test rig is utilized, and this work aims to design a gear test rig using the VDI 2221 method. VDI 2221 is used due to its efficient and systematic design method from the product concept variants. Calculation and design of the components referred to Kiyokatsu Suga and Sularso. Static structural analysis was conducted to determine the strength and safety of the designed gear test. This study's result is a gear test rig design with a maximum von Mises stress of 19.47 MPa at the main frame. Then, a dynamic simulation was carried out, and this designed gear test rig produced a friction coefficient of 0.342.
Behavior of Subsea Pipelines Expansion under High Pressure and Temperature Design Junaidi, Abdul Khair; Afrizal, Efi; Arif, Dodi Sofyan
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 1 No 1 (2013): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v1i1.507

Abstract

In offshore operation, Crude oil is transported by means of pipeline system from oil well to platform at High Pressure and High Temperature. The pipeline will experience expansion and multi stresses due to internal pressure and operating temperature that the material properties of pipe tend to deformation which affect to the durability of pipeline. This phenomenon should be considered in the design process of pipeline and to estimate the expansion is under limit of pipeline strength otherwise the pipeline will be failure cause of catastrophic .
Jacket Structure’s Responses due to Ship Collision Sumiwi, Agustin Dwi; Afrizal, Efi; Junaidi, Abd Khair
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 12 No 1 (2014): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v12i1.476

Abstract

Jacket structure is affected by fluid load or external load when it operationed. One of external load that affect it is impact load subject to something collision. This examination talked about graded and velocity supply vessel influence to local and global structure damage subject to collision. Jacket structure in this examination is CONOCO BELANAK wellhead plaform, mass of supply vessel is 2500 tonnes, with tidal variation (such as: MSL, HWL, LWL) for scenario sideway and stern/bow impact for each normal and 10% exceedane velocity. Deformation type of landing platform impact load is dent subject to landing platform material unability to proof againts pressure. This examination refers to J.P. Kenny in 1988 with title Protection of Offshore Instalasions agains Impact. This examination uses 2 software are ANSYS LS-DYNA 9.0 version and GT-STRUDL 27.0 version. First of all, modeling geometry and loading in ANSYS LS-DYNA to acquired local deformation. Than modeling jacket structure in GT-STRUDL to acquired global deformation uses dynamic trancient analysis. Outside diameter of landing platform is 0.9144 m with wall thickness is 0.0381 m. Normal velocity in each sideway and stern impact is and 10% exceedance velocity is 0.28 m/s and 0.39 m/s. 10% exceedance velocity in each sideway and stern impact is and 10% exceedance velocity is 0.54 m/s and 0.73 m/s. The resutl of this examination is dent of landing platform for each normal and 10% exceedance is 0.2725 m and 0.2352 m, it must be repaired or changed because of it is 10% larger than spacing frame. Maximum displacement x, y, z direction is 0.2423 m on 0.38 s, 0. 0559 m on 0.39 s, 0.7492 m on 0.41 s. The deformation in landing platform and jacket structure is smaller than examination result indeed.
Review on Double Acting Tanker Ship in Ice Mode Afrizal, Efi; Koto, J.; A, Wahid M.; Siow, C. L.
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 38 No 1 (2016): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v38i1.396

Abstract

Podded propulsion system has been utilized to make revolutionary in the integrated ship propulsion and steering system due to diesel-electric and combining pod and rudder in the compact body. This paper would review utilization of podded propulsion system on the Double Acting Tanker (DAT) ship in ice mode. The DAT ship can be operated running ahead mode and astern mode in open water and ice conditions.
Application of Euler Method on Ice Sheet Buckling Koto, J; Afrizal, Efi; M.A, Wahid
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 55 No 1 (2018): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (711.891 KB) | DOI: 10.36842/jomase.v55i1.96

Abstract

Bulbous bow ship economically has advantage during sailing in open water due to lower resistance compared with an ice bow. On the other hand, the movement of the ship gradually give load to the ice sheet, along with that, the ice sheet will react in proportion to the load of the ship. Therefore the bulbous bow ship has higher ice resistance. This paper discusses the phenomena of ice sheet buckling due bulbous bow of ice ship. The ice sheet buckling was analyzed using Finite Element Method based on Euler method. The Euler method was described from general deflection equation for a beam.
Co-Authors A, Wahid M. Abdul Khair Junaidi Akhyar, Waldi Naziful Anang Prasetyo Arif, Dodi Sofyan Arif,, Dodi Sofyan Asral, Asral Cupu, Dedi Rosa Putra Dian Haryanto Dodi Sofyan Arief, Dodi Sofyan Hafis, Muhammad Hazel Herisiswanto, Herisiswanto Junaidi, Abd Khair Kalduma, Ibnu Koto, J Koto, J. Koto, Jaswar M.A, Wahid Muhammadu, Muhammadu Masin N. Nazaruddin N. Nazaruddin Nurhidayat, Muhammad Rahman, Soleh Samad, Rahimuddin Siow, C. L. Sugianto, Irwan Sumiwi, Agustin Dwi Warman Fatra, Warman