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All Journal AUSTENIT APTEK Kinetika Jurnal Konversi Energi dan Manufaktur MACHINERY: Jurnal Teknologi Terapan Jurnal Sains dan Teknologi Jurnal Foundry International Journal of Mechanics, Energy Engineering and Applied Science (IJMEAS) Majalah Teknik Mesin
Sumarna, Herlin
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Dentistry Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Public Health Veterinary

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Pengaruh Penambahan Selulosa Kulit Nipah (Nypa fruticans) terhadap Karakteristik Smart Packaging Berbasis Pati – Kitosan Nina Hartati; Andriani, Tiara; Kurniawan, Edi; Sumarna, Herlin
INSOLOGI: Jurnal Sains dan Teknologi Vol. 5 No. 2 (2026): April 2026
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v5i2.7978

Abstract

The development of environmentally friendly packaging materials with the ability to monitor food quality has become an important focus in biomass-based innovations. This study aims to develop bioplastic films based on durian seed starch–chitosan reinforced with cellulose from nipa palm husk and functionalized as smart packaging by incorporating Coleus scutellarioides (miana) extract as a natural indicator. The films were prepared using the solution casting method with varying starch-to-chitosan ratios (2:8, 4:6, 6:4, and 8:2) and cellulose additions (1 g, 3 g, and 5 g). Characterization included tensile strength, elongation at break, Young’s modulus, Water Vapor Permeability (WVP), Water Vapor Transmission Rate (WVTR), and sensitivity to meat quality. The results showed that the highest tensile strength (10.718 MPa) was obtained at the 2:8 ratio with 1 g cellulose, while the highest elongation (3.49%) was observed at the 8:2 ratio. The maximum Young’s modulus (9.40 MPa) was achieved at the 4:6 ratio with 1 g cellulose. The lowest WVP and WVTR values were found at the 6:4 ratio with 3 g cellulose, indicating improved barrier properties. The anthocyanins in miana extract exhibited a clear color response to pH changes, with prolonged storage leading to a shift toward acidic conditions. Overall, the optimal addition of cellulose enhanced mechanical and barrier properties, whereas excessive amounts led to agglomeration and reduced performance. These findings demonstrate the potential of combining durian seed starch, chitosan, cellulose, and miana extract as a biodegradable smart packaging material.
Analisis Tegangan dan Kegagalan Yoke Propeller Shaft Truk Angkutan Sawit Menggunakan Metode Elemen Hingga Tri Satya Ramadhoni; Sumarna, Herlin; Okviyanto, Toni; Purfaji, Purfaji; Dwi Sampurno, Rachmat
INSOLOGI: Jurnal Sains dan Teknologi Vol. 5 No. 2 (2026): April 2026
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v5i2.8001

Abstract

Failure of slip yoke components in palm oil transport vehicle transmission systems is generally caused by complex and cyclic dynamic loading. This study aims to analyze stress distribution and predict failure locations using a Metode Elemen Hingga (FEM)-based approach. A three-dimensional model was developed from actual geometry with controlled simplification using AISI 4140 material. Mesh convergence and quality evaluation were conducted to ensure numerical reliability. The results show that maximum stress increases with load, reaching 196.14 MPa, 294.38 MPa, 392,40 MPa, and 490.52 MPa for loads of 4, 6, 8, and 10 tons, respectively. At 10 tons, the stress exceeds the material yield strength (415 MPa), indicating plastic deformation. Stress concentration occurs at the critical section (C–C) due to geometric discontinuities and combined loading, consistent with observed failure locations. Comparison with analytical results shows less than 1% deviation, confirming model accuracy. This study demonstrates that FEM effectively predicts stress distribution and failure mechanisms, providing a basis for design optimization and maintenance strategies.
Co-Authors Ahmad Imam Rifa’i Andriani, Tiara Angga Setiawan Anwar, Zainuri Arizal Aswan Dwi Sampurno, Rachmat Edi Kurniawan Fauzi Widyawati Ghinatajaya , Labib Gurruh Dwi Septano Haryanto . HIDAYATI, BAITI Homzah, Ozkar F Muhammad Irfan Dzaky Nasution, Gaizka Ghifari Nasution, Ghifari Negash, Semir M Nina Hartati Okviyanto, Toni Purfaji, Purfaji Putri, Fenoria Ramadhoni, Tri Satya Rasid , M. Rifa'i, Ahmad Imam Rifa’i, Ahmad Imam Romli Romli, Romli Sampurno, Rachmat Dwi Satya Ramadhoni, Tri setiawan, Dibyo Subeno, Agus Sutini Pujiastuti Lestari Tri Satya Ramadhoni Wijaya , Aji Pangestu Zainuri Anwar Zamheri, Ahmad Zikri, Ahmad