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All Journal Jurnal Energi Dan Manufaktur Rekayasa Mesin Sinergi ROTOR: JURNAL ILMIAH TEKNIK MESIN Jurnal Rekayasa Mesin Journal of Mechanical Engineering Science and Technology JTERA (Jurnal Teknologi Rekayasa) SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan STATOR: Jurnal Ilmiah Mahasiswa Teknik Mesin Jurnal Elemen J-Proteksion: Jurnal Kajian Ilmiah dan Teknologi Teknik Mesin Jurnal Abdi Masyarakat Indonesia Jurnal Ilmiah Teknik Mesin Poros Jurnal Offshore: Oil, Production Facilities, and Renewable Energy Prosiding Seminar Nasional Rekayasa Teknologi Industri dan Informasi ReTII Jurnal Pengabdian Masyarakat dan Riset Pendidikan J-Proteksion : Jurnal Kajian Ilmiah dan Teknologi Teknik Mesin
Hary Sutjahjono
Jurusan Teknik Mesin, Universitas Jember
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Transportation Other

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Hardness and microstructure of FDM 3D printed parts using self-made PLA-brass filaments Darsin, Mahros; Ramadhan, Ivan Fadilla; Sumarji, Sumarji; Dwilaksana, Dedi; Sutjahjono, Hary; Ales, Steve Korakan
SINERGI Vol 28, No 3 (2024)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2024.3.001

Abstract

Technological advancements in the industrial sector have led to rapid developments in 3D printing technology, enabling the creation of three-dimensional prototype models. Various filaments, including polyethylene terephthalate glycol, nylon, and polylactic acid, have been widely adopted in the industry. However, filaments composed of metal mixtures are relatively scarce in Indonesia, primarily available only through select online shops worldwide. The production and sale of such filaments present lucrative opportunities within the manufacturing industry. In this research, an experimental study was conducted to examine the hardness of test specimens fabricated using PLA-brass filament. The objective was to identify the optimal hardness value of the specimens. The study focused on three key parameters: nozzle temperature, layer height, and print speed, each at two different levels. The Taguchi L4(2³) experimental design was employed, along with S/N ratio and ANOVA analysis, to evaluate the results. The findings revealed that specific combinations of parameters yield favorable hardness values, as determined by the Taguchi Method. The optimal set of parameters for achieving good hardness values was determined to be a nozzle temperature of 230°C, a layer height of 0.2 mm, and a print speed of 40 mm/s. These results enhance the understanding of PLA-brass filament properties and facilitate the utilization of 3D printing technology in the manufacturing industry. 
Studi Eksperimen Variasi Laju Aliran Pendinginan dan Pelapisan Kaca Film pada Panel Surya Bersistem Tubular Cooler Hardiatama, Intan; Devlin, Nigel Gavriel; Mulyadi, Santoso; Sutjahjono, Hary; Hentihu, Fahrur Rozy; Ilminafik, Nasrul; Trifiananto, Muhammad
Jurnal Rekayasa Mesin Vol. 19 No. 2 (2024): Volume 19, Nomor 2, Agustus 2024
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v19i2.5360

Abstract

Panel surya dapat mengubah energi matahari menjadi listrik, Penggunaan panel surya masih memiliki kendala, salah satunya adalah efisiensi daya keluaran yang masih rendah. Salah satu cara untuk meningkatkan efisiensi daya keluaran panel surya adalah dengan mengatur temperatur panel surya. Temperatur panel surya yang terlalu tinggi akan mengurangi efisiensi panel surya, sehingga diperlukan sistem pendinginan untuk menjaga temperatur panel surya tetap pada temperatur yang optimal. Variasi laju aliran pada tubular cooler serta pelapisan kaca film digunakan pada penelitian ini. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh tubular cooler dan kaca film pada panel surya terhadap daya keluaran, efisiensi maupun temperatur yang dihasilkan. Metode penelitian yang digunakan adalah metode eksperimental dengan menggunakan sistem pendingin tubular cooler dan kaca film pada panel. Pengambilan data dilakukan selama 6 hari dikondisi luar lapangan. Tingkat kegelapan kaca film divariasikan dan membaginya menjadi dua kelompok penelitian. Pada penelitian pertama digunakan kaca film 0% dan variasi laju aliran 1,2 L/menit, 1,6 L/menit dan 2 L/menit. Pada kelompok penelitian kedua menggunakan kaca film 20% dan variasi laju aliran 1,2 L/menit, 1,6 L/menit dan 2 L/menit. Hasil penelitian pada kelompok pertama menunjukkan panel surya mengalami penurunan temperatur terbesar hingga 11,69%. Penuunan temperatur yang terjadi, menghasilkan peningkatan daya keluaran hingga mencapai 31,88% dibanding panel tanpa pendingin. Pada penelitian kelompok kedua, penggunaan kaca film 20% sangat efektif dalam menurunkan temperatur panel hingga 15,84%, tetapi mengalami penurunan daya keluaran. Penurunan ini disebabkan karena adanya pengurangan intensitas matahari yang diterima oleh panel.
PENGARUH VARIASI BARREL TEMPERATURE, INJECTION PRESSURE DAN COOLING TIME TERHADAP CACAT WARPAGE PADA PROSES INJECTION MOLDING (AL-PP) Saputra, Dheo Ardi Nugraha; Sutjahjono, Hary; Yudistiro, Danang; Rozy H, M Fahrur; Noor HS, Skriptyan
STATOR: Jurnal Ilmiah Teknik Mesin Vol 7 No 2 (2024): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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Abstract

Plastic is a polymer that has unique and extraordinary characteristic properties. With a binder (plastic) can be combined with metal elements, namely aluminum. Aluminum is chosen as an alloy material because it has good strength and tenacity. Metal alloy plastic can be processed by a method called injection molding. Injection molding is a process used in making plastic products. This research was conducted with barrel temperature, injection pressure and cooling time process variables. While the response variable is warpage defects. This study aims to determine the effect of variations in process parameters is barrel temperature, injection pressure, cooling time on warpage defects in injection molding products with Al-PP alloy material, and find out the optimum variation of parameters in the injection molding process. The results showed that barrel temperature had an effect of 91.62% on the value of warpage defect response, this condition can be observed as the level barrel temperature increases, the value of warpage defects also increases. The effect of 6.43% injection pressure on the value of warpage defects due to an increase in each injection pressure level will reduce the chance of warpage defects. The effect of cooling time parameters is 1.78% on the value of warpage defects, which means that the longer the cooling time, the greater the response or warpage produced. The optimum variation of parameters in the injection molding process in the ASTM A370 test specimen in barrel temperature parameters at level 1 is 150 oC, the injection pressure parameter at level 3 is 11 bar and the cooling time parameter at level 1 is 15 seconds.
ANALISIS HAMBATAN PENAMBAHAN STERN FLAP PADA KAPAL PATROLI PENGAWAS PERIKANAN MENGGUNAKAN COMPUTATIONAL FLUID DYNAMIC Aziz, Abdul; Indria Dwi Puspita, Hery; Sakinah, Wazirotus; ., Sumarji; Sutjahjono, Hary; Setiawan, Digdo Listyadi
STATOR: Jurnal Ilmiah Teknik Mesin Vol. 8 No. 1 (2025): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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Abstract

This study aims to analyze the addition of Stern flap to the performance of fisheries surveillance patrol vessels using Computional Fluid Dynamics (CFD). Stern flap is an additional component on the hull installed at the stern of the ship and serves to reduce the resistance that occurs on the ship. The design or simulation used to compile this research is a literature study, with the Computational Fluid Dynamics method using ANSYS Workbench for Student 2023 R2 software simulation. This study discusses the analysis, simulation, and research results related to hydrostatic and aerodynamic resistance on patrol boat models with and without the use of stern flaps at speed variations from 10 knots to 25 knots. The results show that the use of stern flaps increases hydrostatic resistance at low speeds, but can reduce aerodynamic resistance at high speeds. The comparison shows a significant increase in hydrostatic resistance at low speed with the highest value at 10 knots of 54%, while a decrease in aerodynamic resistance occurs at high speed, especially at 25 knots with a decrease of 23%. These results provide important insights in patrol boat design for performance optimization at various operational speeds.
Kuat Bending Hasil Cetak 3D printing Berbahan PLA-Kuningan Darsin, Mahros; Efendi , Moh Riski; Jatisukamto , Gaguk; Basuki , Hari Arbiantara; Sutjahjono, Hary
J-Proteksion: Jurnal Kajian Ilmiah dan Teknologi Teknik Mesin Vol. 8 No. 2 (2024): J-Proteksion
Publisher : Universitas Muhammadiyah Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32528/jp.v8i2.1540

Abstract

Teknologi 3D printing merupakan sebuah alat percetakan modern yang sudah berkembang dalam dunia manufacturing. Dalam penelitian ini, dilakukan inovasi dengan menggunakan filamen yang terdiri dari PLA dan kuningan. Penentuan kombinasi parameter 3D printing menjadi kunci untuk mencapai kekuatan bending paling optimal pada hasil cetakan. Parameter yang diatur meliputi suhu nozzle temperature, print speed, dan layer height. Penelitian ini menggunakan metode Taguchi L4(23), serta pengolahan data menggunakan ANOVA. Kombinasi parameter optimal pada penelitian ini menggunakan suhu nozzle temperature 240 ⁰C, layer height 0,2 mm dan print speed 20 mm/s dengan nilai kekuatan bending sebesar 8.72MPa dan terendah 2.66 MPa. Faktor yang berkontribusi terhadap nilai bending adalah nozzle temperature dan layer height dengan kontribusi sebesar 45.29 % dan 20.91 % keduanya memiliki pengaruh yang signifikan. Kontribusi print speed sebesar 9.09 % tidak signifikan.
Instalasi Teknologi Hidroponik sebagai Upaya Pemberdayaan Masyarakat Desa Sukodono dalam Meningkatkan Kemandirian Pangan : Pengabdian Pradiza, Revvan Rifada; Siswantoro, Dwi Heru; Apriandy, Kevin Ilham; Asrofi, Mochamad; Dwilaksana, Dedi; Sutjahjono, Hary; Yani, Luluk Fitri
Jurnal Pengabdian Masyarakat dan Riset Pendidikan Vol. 4 No. 2 (2025): Jurnal Pengabdian Masyarakat dan Riset Pendidikan Volume 4 Nomor 2 (October 202
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jerkin.v4i2.3996

Abstract

This community service activity aims to improve the understanding and skills of residents of RT 07, Sukodono Village, Sidoarjo, in applying hydroponic technology as a solution for managing limited land and supporting food security. This activity consists of lectures and discussions, as well as the installation of a hydroponic system. During the lectures and discussions, residents were given an understanding of the basic principles of hydroponics, its benefits, and how to apply it in limited land. Discussions were held to explore more deeply the challenges and potential of applying hydroponics in a household environment. The final stage, the installation of the hydroponic system, involved residents directly in the creation and installation of a simple but effective hydroponic system. Although there was no harvest to report at the time of the activity, residents successfully understood and installed the hydroponic system correctly. This success shows that residents of RT 07, Sukodono Village have the potential to manage hydroponic gardens independently. This activity made a significant contribution to increasing food self-sufficiency at the local level, even though challenges in terms of maintenance and limited resources remain.
Co-Authors ., Sumarji Abdul Aziz Abdul Haris Siregar Adhitia Yanuar Pratama Adhitia Yanuar Pratama, Adhitia Yanuar Agus Triono Agus Triono Ahmad Adib Rosyadi Ahmad Syuhri Akhmad Nirman Zaki Ales, Steve Korakan Alfredo Bayu Satriya Andi Sanata Andreas Maulana Irsabudi APRIANDY, KEVIN ILHAM Aris Zainul Mutaqqin Basuki , Hari Arbiantara Charismanda Adilla Tristianto Danang Yudistiro Dedi Dwilaksana Devlin, Nigel Gavriel Digdo Listyadi, Digdo Dimas Aditya Dinul Maulidin Dwi Djumharianto Dwi Djumhariyanto Efendi , Moh Riski ERICHA DWI WAHYU SYAH PUTRI Fx. Kristianta Gaguk Jatisukamto Ghozian Hilmi M Gita Kusumastuti Guguk Jatisukamto Hadiatama, Intan Hari Arbiantara Hentihu, Fahrur Rozy Ilman Muhammad Azmi Ilminafik, Nasrul Ilmninafik, Narsul Indria Dwi Puspita, Hery Intan Hardiatama Irjik Abror Maulana Irfida Irsabudi, Andreas Maulana Jannah, Betriqil Jatisukamto , Gaguk Koekoeh KW, Robertoes Luh Putu Ratna Sundari M Arief Hidayat M Asrofi M Dimyati Nashrullah M Katibi Vanhas Mahros Darsin Misto Misto Mochamad Asrofi Mochamad Asrofi Mochamad Trifiananto Muhammad Trifiananto Muhammat Dwi Karisma Mutaqqin, Aris Zainul Nanda Jefri AR Nasrul Ilminnafik Nofal Kharis Nofal Kharis Kharis Noor HS, Skriptyan Novel Bagas Satrio Wibowo Pradiza, Revvan Rifada Prayoga Krisna Febriaji Puranggo Ganjar Widityo Rahma Rei Sakura Ramadhan, Ivan Fadilla Ramadhan, M Edoward Rezky Agus Setiawan Ririn Endah Badriani, Ririn Endah Rizki Romadhon Robertoes Koekoeh KW Robertoes Koekoeh KW Robertus Sidartawan Rohman T. Rohman T., Rohman Romadhon, Rizki Rozy H, M Fahrur Salahuddin Junus Salwasana, Allisa Santoso Mulyadi Saputra, Dheo Ardi Nugraha Setiawan, Digdo Listyadi Setyo Pambudi Siswantoro, Dwi Heru Siti Nur Rahmah Anwar Sumarji Veni Dwi Sulastri Wazirotus Sakinah Yani, Luluk Fitri Yuni Hermawan