cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Cepi Yazirin
Contact Email
cepiyazirin10@unisma.ac.id
Phone
+6289681629094
Journal Mail Official
cepiyazirin10@unisma.ac.id
Editorial Address
Jalan Mayjen Haryono No.193, Dinoyo, Kec. Lowokwaru, Kota Malang, Jawa Timur 65144
Location
Kota malang,
Jawa timur
INDONESIA
RING Mechanical Engineering
Published by Universitas Islam Malang
ISSN : -     EISSN : 28285174     DOI : https://doi.org/10.33474/rm.v3i1
Core Subject : Science, Engineering,
Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
RING Mechanical Engineering (RING ME) with the ISSN number 2828-5174 (online), is a multidisciplinary scientific journal published by Mechanical Engineering, Faculty of Engineering, Universitas Islam Malang. This journal contains articles in the fields of Energy Conversion, Materials, Production and Manufacturing. This jurnal is published twice a year, namely in June and December.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 5 Documents
 1 
Search results for , issue "Vol 5 No 2 (2025): RING Mechanical Engineering" : 5 Documents clear
Karakterisasi, Sifat Mekanik, dan Aplikasi Komposit Biofoam Studi Literatur Muhajir, Muhamad; Reza Taufiqi Ivana; Taufik Abdullah Attamimi; Sri Muntiah Andriami; Uswatun Hasanah
RING ME Vol 5 No 2 (2025): RING Mechanical Engineering
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/rme.v5i2.24070

Abstract

Starch based biofoams have emerged as a sustainable alternative to conventional plastics, yet their performance varies significantly depending on formulation and processing methods. This study aims to comprehensively evaluate the relationship between raw material composition, production techniques, and functional properties of biofoams through an integrated analysis of ten recent formulations. The methodology involved a systematic review of experimental data derived from diverse production methods, including thermopressing, microbial fermentation, evaporative drying, freeze drying, and molding. Results reveal that banana peel and cassava starch and banana stem fiber biofoam offers an optimal balance of high tensile strength 43.86 MPa, low water absorption 16.91%, and moderate biodegradability 65.82%, making it ideal for dry food packaging. In contrast, bamboo powder biofoam exhibits exceptional water absorption 97.1%, suitable for horticultural substrates, while bamboo cellulose–starch composite demonstrates outstanding compressive strength 78.74 MPa and thermal stability 410.86 °C, indicating potential for lightweight structural applications. These findings underscore that biofoam design must be application-specific, providing evidence-based guidance for developing effective, sustainable materials tailored to real world needs.
EPOKSIDASI MINYAK JARAK JATROPHA CURCAS L. UNTUK MENINGKATKAN STABILITAS DAN PERFORMA PELUMAS NABATI RAMAH LINGKUNGAN Agus Dwi Putra; Farida, Nike Nur; Monasari, Ratna; Rakhmaddian, Nicko Nur; Fadhilah, Intan; Prasetyo, Heru
RING ME Vol 5 No 2 (2025): RING Mechanical Engineering
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/rme.v5i2.24145

Abstract

The decline of petroleum reserves and environmental issues from petroleum-based lubricants have driven interest in biolubricants. Jatropha curcas L. oil is a promising candidate due to its availability and non-edible nature, but it lacks sufficient oxidative stability and thermal performance. This study aims to improve jatropha oil quality through in situ epoxidation. The research included oil extraction, initial chemical analysis (acid value, moisture, saponification value, iodine value), epoxidation with varied reactant ratios and reaction times, and post-modification tests of viscosity and flash point. Results indicated that oil yield from dehulled seeds was higher (60%) than hulled seeds (25%). Epoxidation improved viscosity from 2.39 cSt to 34.2 cSt at 40°C and raised the flash point from 109°C to 270°C. These enhancements demonstrate improved physicochemical properties, making epoxidized jatropha oil a potential eco-friendly lubricant comparable to modern synthetic lubricants.
Electric Motor Speed Control on Trimaran Ships Based on Sliding Mode Control Ni Kadek Sri Prameswari; Edi Kurniawan; Diyah Purwitasari
RING ME Vol 5 No 2 (2025): RING Mechanical Engineering
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/rme.v5i2.24236

Abstract

Ships are a means of transportation used in maritime transport activities, yet maintaining propulsion stability and efficiency remains a critical challenge, especially for multi hull vessels such as trimarans operating under dynamic sea conditions. Conventional controllers such as PID and field oriented control (FOC) often struggle to adapt to fluctuating loads and external disturbances. This study addresses that gap by applying Sliding Mode Control (SMC) for brushless DC (BLDC) motor speed regulation on a trimaran prototype. The system employs an STM32 microcontroller integrated with voltage, current, and RPM sensors to provide real time monitoring and robust control. Both static and dynamic tests were conducted at various speed setpoints with artificial wave disturbances. The results indicate that the SMC based system effectively reduced RPM deviation from ±550 RPM in uncontrolled systems to as low as ±3–15 RPM, while current and voltage consumption remained stable within 5%. Furthermore, propulsion efficiency improved by approximately 17% compared to conventional PID control. The most stable performance was achieved at the 8000 RPM setpoint, where current consumption reached 3.9–4.1 A, lower than the 4.7 A observed in uncontrolled operation. However, system performance declined at 10,000 RPM due to nonlinear load effects. These findings demonstrate that SMC provides a robust, adaptive, and energy efficient solution for BLDC motor control in trimaran propulsion, offering significant advantages over traditional methods and serving as a foundation for further optimization in high speed applications.
ANALISIS PENGARUH VARIASI KECEPATAN PUTAR BALL MILL MACHINE TERHADAP KARAKTERISTIK UKURAN PARTIKEL MATERIAL KARBON Wildan Mufti Wirdana; Andita Nataria Fitri Ganda; Arya Mahendra Sakti; Dewi Puspitasari
RING ME Vol 5 No 2 (2025): RING Mechanical Engineering
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/rme.v5i2.24307

Abstract

Ukuran partikel material karbon berperan penting dalam menentukan sifat fisik, kimia, serta potensi aplikatifnya, khususnya dalam industri baterai, metalurgi serbuk, dan teknologi elektroda. Namun, penelitian terkait optimasi parameter penggilingan terutama pengaruh kecepatan putar pada proses ball mill terhadap reduksi ukuran partikel karbon masih terbatas. Studi ini bertujuan untuk mengevaluasi pengaruh variasi kecepatan putar mesin ball mill terhadap karakteristik ukuran partikel karbon yang diperoleh. Metode yang digunakan adalah eksperimen laboratorium dengan memvariasikan kecepatan putar ball mill pada 60 rpm, 100 rpm, dan 140 rpm selama durasi penggilingan 4 jam. Hasil penggilingan dianalisis menggunakan Particle Size Analyzer (PSA) untuk mengetahui distribusi ukuran partikel. Hasil menunjukkan bahwa kecepatan putar berbanding terbalik terhadap ukuran partikel. Kecepatan 60 rpm menghasilkan ukuran partikel rata-rata terkecil sebesar 24,62 nm, sedangkan pada 100 rpm ukuran rata-rata terkecil sebesar 10,00 nm. Efisiensi penghalusan ini disebabkan oleh meningkatnya energi tumbukan yang dihasilkan bola penggiling pada kecepatan tinggi. Hasil penelitian menunjukkan bahwa kecepatan putar merupakan parameter krusial dalam proses penggilingan karbon untuk menghasilkan partikel yang halus dan seragam, serta berkontribusi pada pengembangan proses produksi material karbon skala laboratorium yang efisien dan terkontrol.
Optimasi Parameter Pasca Cetak SLA 3D Printing Terhadap Karakteristik Kekerasan Material Menggunakan Metode Grey Relational Analysis (GRA) Abdul Hamid; Rochmad Eko Prasetyaning Utomo; Ganda Surahman
RING ME Vol 5 No 2 (2025): RING Mechanical Engineering
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/rme.v5i2.24595

Abstract

The demand for durable custom vehicle components requires enhancing the mechanical characteristics of Stereolithography (SLA) materials, which are generally brittle—a gap that must be addressed through post-processing optimization. This study aims to identify the optimal post-processing parameter combinations to maximize the hardness of SLA resin using the Grey Relational Analysis (GRA) method. The experimental design followed a Taguchi L9 orthogonal array, testing four factors Washing Time, Curing Time, Annealing Time, and Annealing Temperature at three levels each, with Shore D hardness as the quality response. The results demonstrated a significant increase in hardness from a baseline of 79.2 Shore D to 82.5 Shore D under optimal conditions. The GRA identified the combination of 15 min Washing Time, 25 min Curing Time, 30 min Annealing Time, and 80°C Annealing Temperature as the optimum setting, resulting in a 16.4% improvement in the Grey Relational Grade (GRG) compared to the experimental mean. ANOVA results confirmed that Washing Time (50.79% contribution, P=0.028) and Annealing Time (41.49% contribution, P=0.034) were the most significant factors (P < 0.05) influencing hardness variation. Conversely, Curing Time was found to be insignificant (P=0.189), suggesting that 15 minutes is sufficient, while residual monomer removal and thermal stress relief during annealing are more critical. Overall, this study concludes that enhancing SLA material hardness depends heavily on thorough cleaning and controlled heat treatment.

Page 1 of 1 | Total Record : 5

 1 

Filter by Year

2025 2025


Reset
Filter By Issues
All Issue Vol 5 No 2 (2025): RING Mechanical Engineering Vol 5 No 1 (2025): RING Mechanical Engineering Vol 4 No 2 (2024): RING Mechanical Engineering Vol 4 No 1 (2024): RING Mechanical Engineering Vol 3 No 2 (2023): RING Mechanical Engineering Vol 3 No 1 (2023): RING Mechanical Engineering Vol 2 No 2 (2022): RING Mechanical Engineering Vol 2 No 1 (2022) Vol 1 No 1 (2021)