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All Journal Journal of Engineering and Technological Sciences Jurnal Fisika FLUX Science and Technology Indonesia Jurnal Informatika Universitas Pamulang Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin JURNAL CRANKSHAFT Scientific Journal of Mechanical Engineering Kinematika Jurnal Abdi Insani Jurnal Abdimas ADPI Sosial Dan Humaniora Integrated Mechanical Engineering Journal
Mohamad Zaenudin
Department of Mechanical Engineering, Faculty of Engineering and Computer Science, Institut Teknologi dan Kesehatan Jakarta
Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Other

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ATOMISTIC INVESTIGATION ON THE ROLE OF TEMPERATURE AND PRESSURE IN DIFFUSION WELDING OF AL-NI Zaenudin, Mohamad; Abdulrazaq, Mohammed N.; Al-Zubaidi, Salah; Gamayel, Adhes; Sunardi, Ade
Journal of Engineering and Technological Sciences Vol 52, No 2 (2020)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2020.52.2.4

Abstract

This paper presents an investigation of diffusion welding of aluminum and nickel at the atomic scale by utilizing molecular dynamics simulation. By employing several temperature and pressure values, the significant influence of the two could be obtained and thus the optimum parameter values could be obtained. The results showed that the bonding mechanism is mostly promoted by Al, in which the deformation and defects are involved. The results on both the mechanical properties and the evolution of the diffusion configuration showed that temperature has more impact compared to pressure. It was indicated that by raising the temperature to 700 K with the lowest pressure (50 MPa), both the mechanical properties and the evolution of the diffusion configuration showed a relatively significant difference. On the one hand, the deformation that occurs during welding, which is mostly caused by raising the temperature, obviously promotes joining and therefore more joining depth can be achieved, although it results in a curved diffusion zone at the interface. On the other hand, it also leads to a lower ultimate tensile strength. During the tensile test, raising the temperature also led to focusing the deformation in the diffusion zone, while a lower temperature resulted in a wider area of deformation.
Atomistic Investigation on the Role of Temperature and Pressure in Diffusion Welding of Al-Ni Mohamad Zaenudin; Mohammed N. Abdulrazaq; Salah Al-Zubaidi; Adhes Gamayel; Ade Sunardi
Journal of Engineering and Technological Sciences Vol. 52 No. 2 (2020)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2020.52.2.4

Abstract

This paper presents an investigation of diffusion welding of aluminum and nickel at the atomic scale by utilizing molecular dynamics simulation. By employing several temperature and pressure values, the significant influence of the two could be obtained and thus the optimum parameter values could be obtained. The results showed that the bonding mechanism is mostly promoted by Al, in which the deformation and defects are involved. The results on both the mechanical properties and the evolution of the diffusion configuration showed that temperature has more impact compared to pressure. It was indicated that by raising the temperature to 700 K with the lowest pressure (50 MPa), both the mechanical properties and the evolution of the diffusion configuration showed a relatively significant difference. On the one hand, the deformation that occurs during welding, which is mostly caused by raising the temperature, obviously promotes joining and therefore more joining depth can be achieved, although it results in a curved diffusion zone at the interface. On the other hand, it also leads to a lower ultimate tensile strength. During the tensile test, raising the temperature also led to focusing the deformation in the diffusion zone, while a lower temperature resulted in a wider area of deformation.
Molecular Dynamics Simulation on Creep Mechanism of Nanocrystalline Cu-Ni Alloy Kasum Kasum; Fajar Mulyana; Mohamad Zaenudin; Adhes Gamayel; M. N. Mohammed
Jurnal Fisika FLUX Vol 18, No 1 (2021): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1834.336 KB) | DOI: 10.20527/flux.v18i1.8548

Abstract

Creep mechanism is an essential mechanism for material when subjected to a high temperature and high pressure. It shows material ability during an extreme application to maintain its structure and properties, especially high pressure and temperature. This test is already done experimentally in many materials such as metallic alloys, various stainless steel, and composites. However, understanding the creep mechanism at the atomic level is challenging due to the instruments  limitation. Still, the improvement of mechanical properties is expected can be done in such a group. In this work, the creep mechanism of the nanocrystalline Cu-Ni alloy is demonstrated in terms of molecular dynamics simulation. The result shows a significant impact on both temperature and pressure. The deformation supports the mechanisms as a result of the grain boundary diffusion. Quantitative analysis shows a more substantial difference in creep-rate at a higher temperature and pressure parameters. This study has successfully demonstrated the mechanism of creep at the atomic scale and may be used for improving the mechanical properties of the material.
Droplet Combustion and Thermogravimetric Analysis of Pure Coconut Oil, Clove Oil, and Their Mixture Adhes Gamayel; MN Mohammed; Mohamad Zaenudin; Eddy Yusuf
Science and Technology Indonesia Vol. 7 No. 3 (2022): July
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1014.035 KB) | DOI: 10.26554/sti.2022.7.3.313-319

Abstract

The droplet combustion and thermal behavior of pure coconut oil (PCO), clove oil, and their mixture were experimentally investigated. The mixture fuels were PCO and clove oil at the percentage of 10% based on volume (PCO-CO10). The experimental method uses droplet combustion and thermogravimetric analysis. The fuel droplet was suspended in the junction of k-type thermocouple and ignited by a coil heater. The ignition and combustion processes of droplets were recorded using a digital single-lens reflex camera at 25 fps. Thermogravimetric analysis with alumina crucible was prepared to investigate the thermal behavior of fuel. The result showed that the sequence of ovoid flame for PCO and PCO-CO10 take place until 0.4 second and 0.44 second, respectively. Complete combustion was explained in that sequence. The ovoid flame was formed when eugenol, terpene, and lauric acid were evaporated first in both PCO and PCO-CO10. Minimum ovoid flame takes place in clove oil due to soot tendency in the burning process that marked flame as the open tip. PCO-CO10 has the highest peak temperature due to the presence both of double carbon chains in fatty acid and aromatic ring structures, which were easy to decompose in high energy input. Clove oil was the lowest onset temperature, which indicates more volatile matter in this fuel and PCO has the highest thermal stability due to the fatty acid component in their fuel.
Analisis Pengaruh Kecepatan Angin Pada Pembangkit Listrik Tenaga Angin Andi Suandi; Ade Sunardi; Ida Bagus Indra; Mohamad Zaenudin; Adhes Gamayel
Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin Vol 12 No 3 (2022): Teknobiz
Publisher : Magister Teknik Mesin Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/teknobiz.v12i3.4247

Abstract

Pengaruh energi dengan perubahan kecepatan angin pada pembangkit listrik tenaga angin (PLTA) terhadap daya yang dihasilkan dengan cara energi angin yang memutar kincir dan akan diteruskan untuk memutar kincir/baling-baling pada generator dibagian belakang sehingga menghasilkan energi listrik .Hasil pengukuran diperoleh dengan mengamati dan memperhatikan hasil pengukuran tegangan, putaran turbin dan arus dengan kecepatan minimum 2m/s dan dapat disimpulkan dengan hasil perhitungan yang dilakukan selama 3 jam 30 menit mulai pukul 11.00- 14.30 WIB, hasil yang didapat dengan tegangan sebesar 14 Volt. Dan daya angin sebesar = 6,75Watt.
Investigation of the Physical Properties and Droplet Combustion Analysis of Biofuel from Mixed Vegetable Oil and Clove Oil Adhes Gamayel; Mohamad Zaenudin; M. N. Mohammed; Eddy Yusuf
Science and Technology Indonesia Vol. 7 No. 4 (2022): October
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1601.783 KB) | DOI: 10.26554/sti.2022.7.4.500-507

Abstract

The study of vegetable oil used as fuel in conventional engines leads to problems like the low volatility and high viscosity. This research aims to evaluate the droplet combustion characteristics that correlated with the density, viscosity, and the flash point of the biofuel from mixed vegetable oil with clove oil. Biofuels used in research are Jatropha Oil (CJO), Kapok Oil (KSO), Coconut oil (CCO), and all biofuel mixed with clove oil in 5% basis volume. Fuel properties that tested both biofuel and fuel mixture using the ASTM method are density (ASTM D1298), viscosity (ASTM D445), The flash point (ASTM D93). The droplet combustion experiment used suspended droplets placed in the junction of the K-type thermocouple and the Ni-Cr wire (as the coil heater) to heat the droplet until the combustion occurred. The result indicates that adding 5% clove oil in biofuel creates higher density, the viscosity decreases until 10%, and the flash point decrease to 30%. Droplet combustion results that adding 5% clove oil creating a more complete combustion process in CCO than KSO and CJO. Higher viscosity in KSO and CJO leads to eugenol and terpene (clove oil compound) trapping in the fuel droplet. Due to eugenol and terpene having great volatility, they are evaporating rapidly leading to secondary atomization and micro-explosion phenomena.
Edukasi 5S di Lingkungan SMK Plus Trimitsa Bersama Dosen dan Mahasiswa JGU Ayu Nurul Haryudiniarti; Sinta Restuasih; Brainvendra Widi Dionova; Mohamad Zaenudin; Yasya Khalif Perdana Saleh
Jurnal Abdimas Adpi Sosial dan Humaniora Vol. 3 No. 4 (2022): Jurnal Abdimas ADPI Sosial dan Humaniora
Publisher : Asosiasi Dosen Pengabdian kepada Masyarakat Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47841/jsoshum.v3i4.255

Abstract

5S is a work culture from Japan that is easy to apply in daily activities, the 5S concept is simple so that it is easy for anyone to understand and understand. The introduction of 5S to Trimitsa Plus Vocational High School students was preceded by introducing what S consists of five parts, namely Seiri, Seiton, Seiso, Seiketsu and Shitsuke. The implementation of community service activities for SMK Plus Trimitsa students is a form of the JGU campus' contribution to the surrounding environment. This activity involved JGU campus students and lecturers who served as material presenters, escorted educational games about 5S and also helped implement 5S in the SMK Plus Trimitsa workshop. Students of SMK Plus Trimitsa are given the opportunity to ask questions and answers about 5S so that they can have the same understanding as the presenter of the material and games related to 5S, namely the game of arranging numbers and letters from boxes containing scattered numbers and letters. The aim is for students to be able to understand that there is a difference between messy and tidy working conditions where if a messy work environment will make it difficult for us to work.
EDUKASI & PENERAPAN ALAT HANDWASHER TOUCHLESS PADA SMK GLOBAL PRIMA KABUPATEN BEKASI, JAWA BARAT Mohamad Zaenudin; Yasya Khalif Perdana Saleh; Adhes Gamayel; Ade Sunardi; Dian Nugraha
Jurnal Abdi Insani Vol 10 No 1 (2023): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v10i1.833

Abstract

In this COVID-19 pandemic season, there are still many people who tend to lack awareness in complying with health protocols, especially in terms of crowding and maintaining hand hygiene. Many innovations for hand washing facilities have been made in tourist places, restaurant toilets, malls, and even places of worship. However, during the current Covid-19 pandemic season, have these placements and tools been able to break the ropes of spreading the virus? The answer is that it is still not enough, because the hand washing place is still touched by many hands. Even though some have used automatic or touchless hand washing stations, the purchase of these tools is quite expensive among the surrounding community. Therefore, in this project we intend to break the rope of the spread of the coronavirus, by designing an economical touchless hand washing sink. Then, after the tool was completed, the grant process to the party in need, namely SMK Global Prima in Tambun Utara, Bekasi Regency, was carried out. Although on a small scale, we hope that this effort can be useful for the students involved, the partners of SMK Global Prima, and the community in general.
SIMULASI UJI IMPACT PADA DESAIN VELG BERBAHAN ASTM A299 DENGAN DIAMETER 15 INCH DENGAN STANDARD UJI SAE J175 Dedi Sofyan; Adhes Gamayel; Mohamad Zaenudin
Scientific Journal of Mechanical Engineering Kinematika Vol 8 No 1 (2023): SJME Kinematika Juni 2023
Publisher : Mechanical Engineering Department, Faculty of Engineering, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/sjmekinematika.v8i`1.255

Abstract

Velg mobil memiliki peranan penting dalam menopang beban dari kendaraan, sehingga velg diharuskan memiliki kekuatan dan desain yang mampu menahan beban kendaraan. Velg yang baik harus mampu menahan beban kendaraan juga benturan yang terjadi selama penggunaan. Benturan yang terjadi akan menimbulkan tegangan pada material velg. Besarnya tegangan dapat disimulasikan menggunakan perangkat lunak berbasis computer aided engineering (CAE). Penelitian mensimulasikan tumbukan pada uji impak dengan standar SAE 175, dengan impak 3200 Newton dan material velg menggunakan ASTM A299 yang memiliki modulus elastisitas sebesar 200 GPa dan yield strength sebesar 275 MPa. Desain velg memiliki perbedaan desain yang terletak pada jari-jarinya berbentuk V dengan besaran sudut V velg model 1 sebesar 22°, velg model 2 sebesar 50°, dan velg model 3 sebesar 90°. Hasil simulasi pada nilai tegangan dan regangan menunjukkan bahwa semakin besar nilai sudut V velg, maka semakin kecil nilai tegangan dan regangan yang dihasilkan akibat tumbukan yang dikenakan pada velg. Hal ini disebabkan oleh kemampuan yang lebih baik dari desain velg dengan nilai sudut V velg yang lebih besar untuk menyebarkan tegangan dan tidak terakumulasi pada suatu titik kritis.
Assistive Technology Tools for Learning Physics Courses for Students with Special Needs Dian Nugraha; Mohamad Zaenudin; Safira Faizah
Jurnal Informatika Universitas Pamulang Vol 8, No 2 (2023): JURNAL INFORMATIKA UNIVERSITAS PAMULANG
Publisher : Teknik Informatika Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/informatika.v8i2.33581

Abstract

The spread of digital information has grown very rapidly and has become a common tool used by all people. This is in line with the development of various infrastructures and digital ecosystems for all lines of life in all fields without exception, especially in this paper which discusses the development of information technology in the field of education. Because in essence education can play an active role in developing the potential of students to develop religious spiritual values, self-discipline, personality, intelligence, noble personality, and abilities that are beneficial to themselves, society, the state, and the Indonesian nation. In line with the vision and mission of Jakarta Global University which concentrates learning on student centered which refers to 21st century learning, where learning is focused on the use of information technology to trigger a learning process that focuses on student learning experience. The development of this system aims to make it easier for students with special needs to understand physics concepts by using simulation methods assisted by modules and other learning tools that can be used by students with special needs, especially for students with hearing disorders. SUS Questionnaire are distributed to get after the posttest to get usability test for the system. Tests using Cronbach's Alpha have been used to find the value of validity and reliability by obtaining an average result of 0.702 for reliability and 0.312 for validity testing. This shows that the developed system can be used easily thanks to the optimization of the features that the author has implemented in the CDIES system to facilitate the needs of students with disabilities.
Co-Authors Abdulrazaq, Mohammed N. Ade Sunardi Ade Sunardi Ade Sunardi Ade Sunardi Ade Sunardi Ade Suparman Adhes Gamayel Adhes Gamayel Adhes Gamayel Adhes Gamayel Adhes Gamayel Adhes Gamayel Adhes Gamayel Adhes Gamayel Adhes Gamayel Aji Saputra Al-Zubaidi, Salah AN Haryudiniarti Andi Suandi Askar Triwiyanto Ayu Nurul Haryudiniarti Bondan Sugiarto Brainvendra Widi Dionova Dedi Sofyan Dian Nugraha Dian Nugraha Dian Nugraha Eddy Yusuf Eddy Yusuf Fajar Mulyana Gamayel, Adhes I Nyoman Jujur Ida Bagus Indra IN Islam Kamal Hamzah Kamal Hamzah Kasum Kasum Luqman Fikri M Fikri M. N. Mohammed M. N. Mohammed MN Mohammed Mohammed N. Abdulrazaq Muhammad Imam Muhammad Naufal Hanif Muhammad Untung Zaenal Priyadi Nashrul Chanief Hidayat RD Hertin Romansa Romansa Safira Faizah Safira Faizah Safira Faizah Salah Al-Zubaidi Sidik Mulyono Sinta Restuasih Sunardi, Ade Udriyah Yasya Khalif Perdana Saleh Yasya Khalif Perdana Saleh Yasya Khalif Perdana Saleh YKP Saleh YKP Saleh Yulianto Simamora