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All Journal Rotasi Jurnal Ilmiah Giga Jurnal Rekayasa Mesin JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY Conference SENATIK STT Adisutjipto Yogyakarta Indonesian Journal of Computing, Engineering, and Design Jurnal Abdi Masyarakat Indonesia Jurnal Pengabdian Teknologi, Ekonomi dan Humaniora Jurnal Sains & Teknologi Fakultas Teknik Universitas Darma Persada Prosiding SNTTM
Juan Pratama
Universitas Darma Persada
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences

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Evaluation of a Nylon 3D-Printed Wrist Splint Through Finite Element Analysis (FEA) and User-Based Assessment Pratama, Juan; Anggara, Ardhito Yogie; Saputra, Ganang Arya; Sugiyanto, Didik; As'yari
Jurnal Rekayasa Mesin Vol. 20 No. 3 (2025): Volume 20, Nomor 3, Desember 2025
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v20i3.7126

Abstract

A wrist splint is a medical assistive device designed to limit wrist movement and provide structural support during post-operative rehabilitation. This study investigates the applicability of 3D printing technology for the fabrication of a customized wrist splint. Finite element analysis (FEA) was carried out to evaluate the mechanical performance of a nylon-based 3D-printed wrist splint, while a user assessment involving ten respondents was conducted to compare the 3D-printed prototype with the commercially available alternatives. The analysis revealed that the 3D-printed nylon splint could sustain loads well above the maximum force generated by human muscles, with normal and von-Mises stresses representing only 5.25% and 7.9% of the material’s ultimate tensile strength (UTS), and maximum flexural stress corresponding to merely 1.4% of its ultimate flexural strength (UFS). Based on user assessment, the 3D-printed splint outperformed commercial ones in terms of lightness, comfort, functionality, and stiffness, though it was less favorable in price and ease of use. Additionally, the findings indicate that the nylon-based 3D-printed wrist splint adequately satisfies the fundamental functional requirements of a wrist support device. Eventually, the results affirm the significant potential of 3D printing technology as a reliable and customizable manufacturing approach for wrist splint application.
Penguatan Ekonomi Petani Jagung melalui Penerapan Teknologi Tepat Guna Prapanen di Desa Pasir Jaya, Kabupaten Bogor Juan Pratama; Didik Sugiyanto; Ario Kurnianto; Atik Kurnianto; Raihan Maulana; Rio Ferdiansyah; Naomi Melva Mariana Sirait; Ferry Yunus
Jurnal Abdi Masyarakat Indonesia Vol 6 No 3 (2026): JAMSI - Mei 2026
Publisher : CV Firmos

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54082/jamsi.2736

Abstract

Petani jagung di Desa Pasir Jaya, Kabupaten Bogor, umumnya mengelola lahan sempit dengan teknik penanaman manual yang membutuhkan waktu lama, bergantung pada tenaga kerja, serta menghasilkan jarak tanam yang tidak seragam. Kondisi riil lapangan ini berdampak pada efisiensi produksi yang rendah dan lemahnya pengelolaan usaha tani, karena sebagian besar petani belum melakukan pencatatan biaya dan hasil panen. Kegiatan pengabdian kepada masyarakat ini dilakukan untuk meningkatkan efisiensi prapanen dan memperkuat pengelolaan usaha tani jagung melalui penerapan teknologi tepat guna berupa mesin penanam jagung. Metode pengabdian meliputi sosialisasi, pelatihan, dan demonstrasi penggunaan mesin penanam jagung pada lahan percontohan seluas ±0,3 ha milik anggota Kelompok Tani Tani Jaya, disertai pendampingan teknis serta pelatihan pencatatan usaha tani sederhana. Evaluasi dilakukan dengan membandingkan kondisi sebelum dan sesudah penerapan teknologi pada musim tanam yang sama. Hasil kegiatan menunjukkan bahwa waktu tanam berkurang dari ±2 hari menjadi ±1,5 hari per petak lahan dan kebutuhan tenaga kerja menurun sekitar 15–20%. Produktivitas jagung meningkat dari 5,3 ton/ha menjadi 5,8 ton/ha. Dari aspek pengelolaan usaha, petani mulai mampu menghitung biaya dan pendapatan, dengan penurunan biaya tanam sekitar 10%. Hasil ini menunjukkan bahwa teknologi tepat guna yang sesuai kondisi lapangan, disertai pendampingan usaha tani, penting untuk memperkuat ekonomi petani jagung secara berkelanjutan.
Effect of Automatic Robotic Clutch on Clutch Lining Wear Characteristics Based on Tribology Testing Billa Vandewa; Erwin Erwin; Didik Sugiyanto; Juan Pratama; Trisna Ardi Wiradinata
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 10 No. 1 (2026): June 2026 Edition
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v10i1.17283

Abstract

The development of semi-automatic clutch systems, such as Automatic Robotic Clutch (ARC), aims to improve driving comfort in manual transmissions. However, changes to the clutch pressing mechanism can affect slip, working temperature, and clutch pad wear rate, so a tribological evaluation is required to ensure the vehicle's durability and performance. This study aims to analyze the effect of ARC installation on the wear rate of manual four-wheeled vehicle clutch pads by measuring run-out, thickness, and keeling nail depth. Tests are carried out on manual vehicles before and after ARC installation. The clutch lining is measured using the indrunout dial based on run-out and rivet depth. The engine's RPM performance is analyzed through sensor readings. The data are compared to identify changes in the wear of the C mounting, indicating an increase in clutch lining wear. This study shows that ARC affects clutch working characteristics in manual vehicles by increasing clutch slip during certain phases, thereby accelerating clutch lining wear as measured by run-out and rivet depth. It has an impact on the stability of vehicle RPM performance. This research contributes to the field of automotive and clutch tribology by providing experimental evidence of the impact of ARC on clutch lining wear, serving as a reference for the development of a more reliable semi-automatic clutch system.
Limitations of Interlocking Features in Rotary Friction Welding (RFW) of 3D-printed PLA Fauzan Al Fathurrahman; Fathur Rahman Naufal Santoso; Erwin; Didik Sugiyanto; Juan Pratama
Jurnal Rekayasa Mesin Vol. 21 No. 1 (2026): Volume 21, Nomor 1, April 2026
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v21i1.7419

Abstract

The limited build volume of fused deposition modeling (FDM) often necessitates the use of joining methods for larger components. However, the effectiveness of interlocking features in the RFW of 3D-printed polymers remains unclear. This study investigates the limitations of interlocking features in RFW of polylactic acid (PLA) by evaluating the effect of male-female geometry on the joint performance. The results show that all interlocked RFW joints exhibit significantly reduced tensile strength, reaching only approximately 30% of the control samples, accompanied by decreased ductility. Despite variations in the interlock geometry, no significant improvement in joint performance was observed. Failure analysis indicates that the excessive weld flash accumulation within the interlocking region generates internal pressure, which restricts material flow and promotes crack initiation. This leads to localized plastic deformation followed by brittle failure at the joint interface. These findings demonstrate that the interlocking geometry does not necessarily enhance joint quality in RFW of 3D-printed PLA and may introduce inherent limitations if not properly designed. This study highlights the critical role of material flow and geometric constraints in governing joint performance, emphasizing the need for optimized interlock design and process control in thermoplastic friction welding.
Co-Authors Abdullah, Bulan Adam Zuyyinal Adib Afifa, Linda Nur Agus Salim, Urip Anggara, Ardhito Yogie Arifviyanto, Budi Ario Kurnianto As'yari Asyari Atik Kurnianto Badranaya, Muhammad Imawan Billa Vandewa Budhi Susetyo, Ferry Budi Arifvianto Danindra Brian Kusuma Darsono DARSONO Didik Sugiyanto Didik Sugiyanto Erwin Erwin Erwin Fandikurnia, Ade Fathur Rahman Naufal Santoso Fauzan Al Fathurrahman Ferry Yunus Herry Susanto Husen Asbanu Husen Asbanu Linda Nur Afifa Mira Febriana Sesunan Mira Febriana Sesunan Muslim Mahardika Naomi Melva Mariana Sirait Novendri, Yos Noverdo Mayanda Nur Syamsiyah Nur Syamsiyah Raihan Maulana Rio Ferdiansyah Saban, Muhamad Zaki Salim, Urip Agus Sandi, Aris Saputra, Ganang Arya Siregar, Rolan Sukmaji Indro Cahyono Sukmaji Indro Cahyono, Sukmaji Indro Suyitno Trisna Ardi Wiradinata Wijaya, Rahman Yahya Yahya yefri chan Yendi Esye