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All Journal Teknika Jurnal Teknik Mesin Infotekmesin
Firdaus Firdaus
Politeknik Negeri Sriwijaya
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering

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Pengaruh Fraksi Volume dan Orientasi Serat Pada Komposit Hibrid Berpenguat Serat Gambas serta Eceng Gondok Terhadap Kekuatan Bending Rizki Ramadoni; firdaus firdaus; Romli Romli; Sailon Sailon; A. Pramudya AFG; Muhammad Nugraha
Jurnal Teknik Mesin Vol 15 No 2 (2022): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.15.2.891

Abstract

Wood is increasingly difficult to obtain due to the use of excess wood. Many efforts were made to replace wood, one of which was composite material. This study aims to determine the most optimal bending strength with the influence of variations in volume fractions and fiber orientation in hybrid composites with luffa fibers and hyacinth fibers. In making composites using the hand lay-up method with alaklization treatment on gambas and hyacinth fibers using 5% NaOH which is varied with the volume fraction used in this study with the ratio of resin: hyacinth: gambas is (60%:20% :20%),(70%:15%:15%), as well as (80% :10%:10%) and the orientation of the fibers with the arrangement of the luffa / hyacinth / luffa layer is (0°/ 45 °/ 90°), (0˚/45˚/0˚), (90˚/0˚/90˚). Bending testing was performed with ASTM D790 standard and hypothesis testing using the two-way ANOVA method. From the results of bending testing, the most optimal strength value was found, which was 43.33 N / mm2, where the value was not higher than the bending strength value in the multiplex, which was 17.53 N / mm2. Meanwhile, the results of hypothesis testing are that there is an influence on the volume fraction factor, the direction of fiber orientation and the interaction with bending forces.
Analisis Pembebanan Pada Pisau Mesin Pencacah Sampah Organik Menggunakan CAE (Computer Aided Engineering) Muhammad Hegel Umari; Firdaus Firdaus; Almadora Anwar Sani
TEKNIKA Vol. 20 No. 2 (2026): Teknika Mei 2026
Publisher : Politeknik Negeri Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.18618890

Abstract

Tujuan dari penelitian ini adalah untuk menganalisis pembebanan pada pisau mesin pencacah sampah organik menggunakan pendekatan computer aided engineering (CAE) dengan material baja perkakas SKD 11. Empat variasi pembebanan, yaitu 688 N, 860 N, 1032 N, dan 1290 N, diuji melalui simulasi elemen hingga statik. Tujuan dari analisis ini adalah untuk mengetahui distribusi tegangan Von Mises, displacement, dan factor keamanan (FOS). Hasil simulasi menunjukkan bahwa tegangan Von Mises sebesar 249,407 MPa, displacement 2,781 mm, dan FOS 1,5 diperoleh pada beban maksimum 1290 N. Nilai tegangan total masih berada di bawah kekuatan pelepasan material SKD 11 sebesar 330 MPa, sehingga pisau tidak mengalami kegagalan struktural dalam kondisi pembebanan yang diteliti. Dengan menggunakan simulasi CAE untuk mengevaluasi variasi tegangan geser material sampah organik, keterbaruan penelitian ini untuk mengevaluasi batas aman operasional pisau pencacah. Untuk meningkatkan keamanan dan umur pakai pisau, batas pembebanan maksimum disarankan. Penelitian ini diharapkan dapat membantu dalam desain dan optimalisasi pisau pencacah sampah organik skala industri dan komunitas.
Analisis Kinerja dan Reduksi Emisi Karbon pada Mesin Pemipil Jagung Berbasis Energi Surya Toni Okviyanto; Hendradinata Hendradinata; Firdaus Firdaus; Tri Satya Ramadhoni; Agis Fika Wulandari; Indra Syahputra; Stevan Juliandro Aruan
Infotekmesin Vol 17 No 2 (2026): Infotekmesin: Juli 2026
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/

Abstract

Agricultural post-harvest operations require technological innovations that enhance productivity while reducing dependence on fossil fuels and environmental impacts. Although solar energy has been increasingly applied in agricultural mechanization, previous studies have primarily focused on technical performance or energy consumption, with limited attention to integrating machine performance evaluation and carbon emission reduction. This study aimed to evaluate the performance of a solar-powered corn sheller and assess its carbon emission reduction potential compared with a gasoline-powered sheller. A comparative experimental method was employed by analyzing shelling capacity, shelling efficiency, energy consumption, kernel damage, and carbon emissions using the Intergovernmental Panel on Climate Change (IPCC) emission factor. The results showed that the solar-powered sheller achieved a shelling capacity of 65 kg h⁻¹ and a shelling efficiency of 90%, which were comparable to the gasoline-powered sheller (69.67 kg/h and 91.67%, respectively). Moreover, the solar-powered system produced no direct operational carbon emissions, whereas the gasoline-powered sheller emitted 0.5082 kg CO₂ per 10 kg of processed corn. The novelty of this study lies in integrating technical performance evaluation with IPCC-based carbon emission analysis. This study provides a comprehensive evaluation framework to support the development of low-carbon agricultural mechanization based on renewable energy.
Co-Authors A. Pramudya AFG Agis Fika Wulandari Almadora Anwar Sani Hendradinata, Hendradinata Indra Syahputra Muhammad Hegel Umari Muhammad Nugraha Rizki Ramadoni Romli Romli Sailon Sailon Stevan Juliandro Aruan Toni Okviyanto Tri Satya Ramadhoni