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All Journal Journal of Mechanical Engineering Science and Technology JURNAL DINAMIKA VOKASIONAL TEKNIK MESIN Chemistry Indonesian Journal of Chemical Research Dedikasi: Jurnal Pengabdian Masyarakat Jurnal Graha Pengabdian Jurnal Mekanik Terapan TEKIBA : Jurnal Teknologi dan Pengabdian Masyarakat Jurnal Ilmu Administrasi Negara Journal of Indonesian Society Empowerment RING Mechanical Engineering Proceeding of The International Conferences on Engineering Sciences
Jibril Maulana
Universitas Negeri Malang
Religion Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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OPTIMASI PARAMETER DRY MACHINING PADA PROSES PEMBUBUTAN CNC MATERIAL BAKELITE UNTUK MENDUKUNG MANUFAKTUR BERKELANJUTAN MENGGUNAKAN METODE TAGUCHI Riyanto, Obaja Eden Sentosa; Muhammad Ilman Nur Sasongko; Saifuddin Karim; Jibril Maulana; Dewi Izzatus Tsamroh; Sis Nanda Kus Andrianto
RING ME Vol 5 No 1 (2025): RING Mechanical Engineering
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/rme.v5i1.23600

Abstract

Penelitian ini bertujuan untuk mengoptimalkan parameter proses pemesinan kering (dry machining) pada material Bakelite menggunakan metode Taguchi, dengan fokus pada minimisasi kekasaran permukaan (Ra). Tiga parameter utama yang diuji adalah kecepatan spindle (700, 800, 900 rpm), feed rate (0,18; 0,23; 0,28 mm/rev), dan depth of cut (0,3; 0,4; 0,5 mm), yang dikombinasikan dalam desain eksperimen orthogonal array L9 (3³). Pengujian dilakukan pada mesin CNC turning LEADWELL menggunakan pahat karbida tanpa pendingin. Pengukuran nilai kekasaran permukaan dilakukan dengan surface roughness tester Mitutoyo SJ-210, dan hasil dievaluasi menggunakan rasio signal-to-noise (S/N). Hasil menunjukkan bahwa feed rate merupakan faktor paling dominan terhadap kualitas permukaan. Nilai feed rate 0,23 mm/rev menghasilkan kekasaran tertinggi, sementara kombinasi parameter optimal yaitu kecepatan spindle 800 rpm, feed rate 0,18 mm/rev, dan depth of cut 0,3 mm memberikan kekasaran permukaan terendah. Selain itu, ditemukan bahwa peningkatan kecepatan spindle cenderung meningkatkan kekasaran akibat efek termal, sedangkan depth of cut 0,4 mm menghasilkan performa terburuk dibandingkan 0,3 mm dan 0,5 mm. Metode Taguchi terbukti efektif dalam mengidentifikasi parameter optimal dengan efisiensi eksperimen tinggi, mendukung penerapan strategi pemesinan presisi berbasis prinsip manufaktur berkelanjutan tanpa pendingin.
QUANTITATIVE MACRO DEFECT ANALYSIS IN SAND CASTING: 3D SIMULATION AND POROSITY ASSESSMENT IN ASHTRAY PATTERNS Maulana, Jibril; Adjie P.W, Muhammad; M.H, Rachmanda; Aliyudin F, Rifan; Maulana, Yusuf; Lubis, Didin Zakariya
Jurnal Dinamika Vokasional Teknik Mesin Vol. 9 No. 2 (2024)
Publisher : Department of Mechanical Engineering Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/dinamika.v9i2.77486

Abstract

Simulation analysis and quantitative approaches have become very important in the foundry industry to improve product quality and minimize defects. This study aims to analyze macro defects, particularly porosity, in ashtray patterns produced through sand casting. A quantitative approach was used to identify and evaluate macro defects in the castings by utilizing 3D simulation techniques. This process involves taking macro images of the molded samples and then processing them to determine the porosity level. The porosity evaluation was carried out by comparing the simulation results with experimental data, thus enabling a more in-depth understanding of the factors affecting casting quality. The results of this study show the porosity formed by 3-dimensional simulation and the porosity percentage derived from statistical interpretation of macro photographs of sand casting materials. The findings are expected to make a meaningful contribution to the foundry industry, particularly in the effort to improve product quality through process optimization. This study also highlights the importance of quantitative and simulation approaches in analyzing and predicting casting defects, which can ultimately reduce production costs and improve product yield.
Simple Engineering-Based Cardboard Game Media to Support Contextual Learning at Al-Ya'lu Elementary School, Malang. Maulana, Jibril; Riyanto, Obaja Eden Sentosa; Sasongko, Muhammad Ilman Nur; Andrianto, Sis Nanda Kus; Lubis, Didin Zakariya
Journal of Indonesian Society Empowerment Vol. 3 No. 2 (2025): December
Publisher : Yayasan Lentera Avanya Nagari

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61105/jise.v3i2.264

Abstract

Educational games have been widely recognized as effective instructional tools that enhance students’ motivation and engagement in learning. This community engagement program aims to strengthen contextual learning for fourth- and fifth-grade students at SD Unggulan Al-Ya’lu through the development and implementation of simple engineering-based cardboard game media. The initiative addresses the school’s demand for practical and engaging teaching aids that connect abstract scientific concepts—such as force, motion, and simple mechanisms—with real-world phenomena. A problem-solving approach was employed, consisting of four key phases: preparation, program socialization, counseling, and hands-on training. During the implementation, students were guided to design and construct low-cost educational games made from recycled cardboard, including hydraulic claw machines and simple vending machines. The impact of the program was evaluated through pre-test and post-test assessments to measure students’ conceptual understanding. The results indicated a significant improvement in comprehension scores, increasing from an average of 64.36 to 87.05. This outcome reflects enhanced cognitive skills and a deeper understanding of basic mechanical concepts. Furthermore, the activity fostered collaboration, creativity, and active participation. These findings demonstrate that simple, low-cost engineering projects can serve as effective contextual learning media and provide sustainable pedagogical strategies for elementary education. Permainan edukatif telah terbukti dapat digunakan sebagai media pembelajaran yang efektif dalam meningkatkan motivasi dan keterlibatan peserta didik. Program pengabdian masyarakat ini bertujuan untuk memperkuat pembelajaran kontekstual bagi siswa kelas IV dan V di SD Unggulan Al-Ya’lu melalui pengembangan dan penerapan media permainan kardus berbasis rekayasa sederhana. Inisiatif ini dilatarbelakangi oleh kebutuhan sekolah terhadap media pembelajaran yang praktis dan menarik guna menjembatani konsep-konsep sains dasar—seperti gaya, gerak, dan mekanisme sederhana—dengan fenomena nyata di lingkungan sekitar. Pendekatan pemecahan masalah digunakan melalui empat tahapan utama, yaitu persiapan, sosialisasi program, penyuluhan, dan pelatihan praktik. Dalam pelaksanaannya, siswa dilatih untuk merancang dan membuat permainan edukatif berbiaya rendah dari kardus bekas, seperti mesin capit hidrolik dan mesin penjual sederhana. Dampak kegiatan dievaluasi melalui pre-test dan post-test untuk mengukur peningkatan pemahaman konsep siswa. Hasil menunjukkan peningkatan signifikan dari skor rata-rata 64,36 menjadi 87,05, yang mencerminkan peningkatan kemampuan kognitif dan pemahaman terhadap konsep mekanika dasar. Selain itu, kegiatan ini juga mendorong kolaborasi, kreativitas, serta partisipasi aktif siswa. Temuan ini menegaskan bahwa proyek rekayasa sederhana berbiaya rendah dapat menjadi media pembelajaran kontekstual yang efektif serta mendukung strategi pedagogis berkelanjutan di pendidikan dasar.
Intermolecular Characterization of Chitosan from the Exoskeleton of Windu Prawn (Penaeus monodon) and Mangrove Crab (Scylla sp.) Arista, Rini Anggi; Nugraheni, Dian; Qomaliyah, Eka Nurul; Mulyati, Yayuk; Maulana, Jibril; Dewi, Kadek Risa Rivana; A'yuni, Shahira Qistan
Indonesian Journal of Chemical Research Vol 13 No 3 (2026): Edition for January 2026
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2026.13-rin

Abstract

Chitosan (C6H11NO4)n is a chitin-derived polymer that has good biocompatibility, biodegradability, and bioabsorbability properties. This compound can be obtained from exoskeleton waste such as mangrove crabs and Windu prawn. This study aims to evaluate the comparison of chitosan levels based on the degree of deacetylation (%DD) from the waste shell, head, and leg of Windu prawn and mangrove crab shell waste obtained from the coastal area of Pasuruan, East Java. The extraction method was carried out through the stages of deproteinization, demineralization, and deacetylation using an alkaline solution, and then the characterization of molecular structure and %DD was carried out using an FTIR spectrophotometer. The results showed that chitosan from Windu prawn shell had the highest %DD of 73.0%, while mangrove crab shell and prawn head and leg showed lower values of 55.3% and 63.9%. This difference in %DD value indicates a variation in the success rate of deacetylation due to differences in biomaterial composition. The results of SEM testing showed that the use of the type of material in the manufacture of chitosan would affect the results of the surface morphology produced, where the Windu prawn shell produced the flattest surface.
Analisis Sifat Mekanik dan Penyerapan Air Komposit Polyester Berbasis Serat Alami Kus Andrianto, Sis Nanda; Maulana, Jibril; Sentosa Riyanto, Obaja Eden; Tsamroh, Dewi Izzatus; Nur Sasongko, Muhammad Ilman; Andromeda, Tata; Simangunsong, Rahel; Fahrozy, Muhammad Micho
Jurnal Mekanik Terapan Vol 6 No 3 (2025): Desember 2025
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/jmt.v6i3.7978

Abstract

Natural fibers are increasingly utilized as reinforcing materials in the modern materials industry. In this study, composites comprising 15% untreated coconut fiber, pineapple leaf fiber, palm fiber, corn husk fiber, or sugar cane fiber and 85% polyester were fabricated. Water absorption was evaluated by immersing the composites for 3, 7, 14, and 21 days. The tensile strength and morphology of unsoaked composites were also assessed to determine the influence of fiber type. Water absorption increased with immersion time for all composites, although the trends varied among fiber types. The coconut fiber composite exhibited the highest water absorption rate, whereas the pineapple leaf fiber composite demonstrated the lowest. The pineapple leaf fiber composite also achieved the highest tensile strength. In contrast, composites containing coconut fiber, palm fiber, corn husk fiber, and sugar cane fiber displayed lower tensile strength, attributed to imperfect interfacial bonding between the fibers and the polyester matrix.
Engineering of Coffee Waste Based Drainage Filtration Media on Polyester Fabric for Green Infrastructure Applications Muchamad Yafis; Jibril Maulana; Rizka Sarah H. F. A.; Dewi ‘Izzatus Tsamroh
Proceeding of the International Conferences on Engineering Sciences Vol. 3 No. 1 (2026): January : Proceeding of the International Conferences on Engineering Sciences
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/iconfes.v3i1.187

Abstract

The growing pressure on urban drainage systems caused by blockages and environmental pollution highlights the importance of developing sustainable filtration materials. This study explores the use of coffee waste as an environmentally friendly filler integrated into polyester fabric (PE 24S) to create a green filtration medium for drainage applications. The research focuses on developing and characterizing the composite material through macro-photographic morphology analysis, tensile strength testing, and antibacterial evaluation. The findings demonstrate that polyester fabric modified with coffee waste shows a tensile strength of 54.024 ± 5.498 MPa, elongation of 111.128 ± 6.915%, and a Young’s modulus of 0.486 ± 0.543 MPa, indicating improved flexibility and sufficient mechanical durability for drainage system use. Additionally, antibacterial testing reveals that the composite material can inhibit microbial growth due to the presence of natural bioactive compounds found in coffee waste. Overall, the results suggest that coffee waste–enhanced polyester fabric offers a sustainable and mechanically reliable alternative for environmentally friendly drainage infrastructure while supporting circular economy practices.
Evaluation of Tensile Strength of Sisal, Bamboo, and Pinepple Leaf Fiber Composite for Potential Use Infrastructure Syekhan Maulana; Jibril Maulana; Dewi ‘Izzatus Tsamroh; Muhammad Ilman Nur Sasongko
Proceeding of the International Conferences on Engineering Sciences Vol. 3 No. 1 (2026): January : Proceeding of the International Conferences on Engineering Sciences
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/iconfes.v3i1.188

Abstract

The construction and infrastructure sectors are shifting toward lighter, low-emission, and sustainable materials in response to the high carbon footprint and excessive weight of common materials such as concrete and steel. One promising alternative widely developed is natural fiber–based composites. However, studies comparing mechanical properties of variations of natural fibers within a single framework remain limited. This study aims to evaluate and compare composite mechanical properties reinforced by sisal fiber, bamboo fiber, and pineapple leaf fiber to determine the optimal fiber type for sustainable infrastructure applications. The research methodology involved fabrication of composite specimens using a unidirectional fiber configuration with a resin matrix, molded following ASTM D638 Type I dimensional and geometrical requirements. Tensile testing was conducted to evaluate mechanical responses, including ultimate tensile behavior, deformation characteristics, and elastic properties, which were presented in tabular and graphical forms. The results show that incorporation of all natural fiber types significantly enhanced composite mechanical properties, exhibiting an average tensile strength of approximately 26 MPa. Pineapple leaf fiber demonstrated balanced mechanical behavior combining strength and ductility, while sisal fiber showed superior tensile resistance and rigidity. Bamboo fiber provided moderate mechanical improvement. Overall, natural fiber–reinforced composites demonstrate strong potential as environmentally friendly alternative materials for infrastructure applications, with mechanical characteristics adjustable based on reinforcing fiber type.
Transformation of Production Techniques and Textile Materials Towards Sustainable Fashion Rizka Sarah Heydarina Fathima Ahsan; Jibril Maulana; Galih Janggan Titian; Dina Aulia Mawardah; Aurelia Vika Anggun R
Proceeding of the International Conferences on Engineering Sciences Vol. 3 No. 1 (2026): January : Proceeding of the International Conferences on Engineering Sciences
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/iconfes.v3i1.191

Abstract

This study aims to analyze the relationship between production techniques, selection of textile materials and the level of sustainable fashion implementation in MSMEs in the fashion sector in Indonesia. The method used in this study is a quantitative approach with an expplanatory descriptive design. Data was collected through a questionnaire distributed to MSME respondents in the fashion sector and collected 100 respondents. The variables tested in this study are knowledge of sustainable fashion, production techniques used by MSMEs and textile materials applied in production. Data analysis used validity, readiness, t-test and multiple linear regression tests. The results of the study show that production techniques have a significant influence on the level of sustainable fashion implementation, with a p-value of 0.041. Meanwhile, textile knowledge and materials did not show a significant influence on the implementation of sustainable fashion with a p-value of >0.05. The value of the determination coefficient (R2) for production techniques is very high at 0.95, which shows that production techniques are the most influential factor in the implementation of sustainable fashion in MSMEs in the fashion sector to prioritize the development of sustainable production techniques as the main step towards increasing sustainability in the fashion sector.
Co-Authors 'Izzatus Tsamroh, Dewi A'yuni, Shahira Qistan Abdillah, Hartawan Adjie P.W, Muhammad Ahmad Atif Fikri Aisyah Larasati Alief Muhammad Aliyudin F, Rifan Aminnudin, Aminnudin Andrianto, Sis Nanda Kus Andromeda, Tata Asus Maizar Suryanto H Aurelia Vika Anggun R Dani Hari Tunggal Prasetiyo Dewi Izzatus Tsamroh Dewi ‘Izzatus Tsamroh Dewi, Kadek Risa Rivana Dian Nugraheni Didin Zakariya Lubis Dina Aulia Mawardah Eka Nurul Qomaliyah Fahrozy, Muhammad Micho Faqih Fadillah Fathul Qorib Galih Janggan Titian Heru Suryanto Ismail, Mahrus Kus Andrianto, Sis Nanda Linda Kurnia Supraptiningsih M.H, Rachmanda Mahsuli, Taufiq Mandala, Wirawan Widya Mas Ahmad Baihaqi Masera, Kemal Mito, Mohamed T Muchamad Yafis Muhammad Ilman Nur Sasongko Muhammad Ilman Nur Sasongko Nico Rahman Caesar Nugroho Santoso Putra, Agus Dwi Radhian Krisnaputra Ramadhan, Rahmad Ikrom Riana Nurmalasari Rini Anggi Arista Riyanto, Obaja Eden Sentosa Rizka Sarah H. F. A. Rizka Sarah Heydarina Fathima Ahsan Saifuddin Karim Sentosa Riyanto, Obaja Eden Setiawan, Widia Simangunsong, Rahel Sis Nanda Kus Andrianto Syekhan Maulana Utari, Inpita Casuarina Eqisetia Wahyu Nur Achmadin Winarto, Felixianus Eko Wismo Yanuhar, Uun Yayuk Mulyati Yusuf Maulana, Yusuf