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All Journal Turbo : Jurnal Program Studi Teknik Mesin Jurnal Alat Berat Jurnal Inovasi Mesin
Sutriyatna, Sutriyatna
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Automotive Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Analisis Pengaruh Variasi Putaran Terhadap Sifat Mekanik Aluminium Dan Aluminium Cor Pada Pengelasan FSW Azmal, Azmal; Iyus, Iyus; Sutriyatna, Sutriyatna
JURNAL ALAT BERAT Vol 2 No 1 (2025): Januari 2025
Publisher : Politeknik Negeri Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/jab.v2i1.33

Abstract

Friction stir welding (FSW) adalah proses penyambungan material dengan kondisi solid ataupun logam tidak meleleh saat dilakukan penyambungan. Metode ini digunakan agar karakteristik dari logam induk tidak banyak berubah. Proses ini banyak digunakan pada material khususnya aluminium. Pada penelitian ini akan dilakukan analisa pengaruh variasi putaran (rpm) dimana putaran yang digunakan adalah 1115, 1750 dan 2720 rpm terhadap sifat mekanik dari material aluminium dan aluminium cor pada proses friction stir welding (FSW). Pengujian yang dilakukan adalah kekuatan impak charpy, kekerasan vickers dan struktur mikro. Pada pengujian kekerasan vickers pada proses FSW putaran yang mempunyai kekuatan terbesar berada pada putaran rpm 1750 yaitu sebesar 93,46 HV, pada pengujian impact sudut akhir yang terbesar terjadi pada putaran rpm 1115, sudut yang terbentuk -0,55 = 1,24 J/mm2, patah getas terjadi pada bahan yang mempunyai temperatur rendah dan hal ini terlihat bahwa temperatur dan bentuk takikan berpengaruh terhadap kekuatan impak suatu material.
Manufacturing of Organic Waste Shredding Machine Andriani, Devi; Suhendra, Diky Rahmat; Sutriyatna, Sutriyatna; Yani, Rina Dwi; Pratomo, Tri; Sa'adah, Nurul
TURBO [Tulisan Riset Berbasis Online] Vol 14, No 1 (2025): TURBO : Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v14i1.4107

Abstract

Organic waste shredders are designed to speed up waste processing by chopping organic matter into smaller sizes, which in turn makes decomposition processes easier, such as composting or biogas production. The effective design of the shredding mechanism is essential for improving machine efficiency and ensuring optimal engine durability. Some factors that need to be considered in the design of an organic waste shredder include the type and characteristics of organic matter, the shredding mechanism used (such as knives, rollers, or hammer mills), motor power and rotation speed, feeding system, and the resistance of the machine's materials to wear. In addition, aspects of safety, user comfort, and noise and vibration reduction are also important elements in machine design. Choosing the right design based on these factors will allow the machine to operate efficiently, produce consistent shredding results, and accelerate the organic waste processing process, ultimately contributing to better and sustainable waste management. Keywords: Chopping Machine, Organic Waste, Enumerating Mechanism, Decomposition, Machine Design
Analysis of biodiesel yield percentage from used cooking oil with variations in stirring time Dewi, Sukhma Kusuma; Faizal, Ahmad; Sutriyatna, Sutriyatna
Jurnal Inovasi Mesin Vol. 7 No. 1 (2025): APRIL 2025
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jim.v7i1.22431

Abstract

The increasing volume of hazardous and toxic waste (B3), particularly from used cooking oil, poses significant environmental and health challenges. One promising solution is converting this waste into biodiesel, thereby promoting renewable energy development while reducing ecological risks. This study investigates the yield percentage of biodiesel produced from waste cooking oil using a magnetic stirrer. The research aims to determine the optimal stirring duration to maximize yield and evaluate the flame duration of the resulting biodiesel. The process involved tool and material preparation, biodiesel production via transesterification, and subsequent data collection and analysis. The findings revealed that the highest biodiesel yield, 58.4%, was achieved at a stirring duration of 45 minutes, whereas the lowest yield, 51.2%, occurred at 60 minutes.
Co-Authors Ahmad Faizal Azmal, Azmal Devi Andriani Dewi, Sukhma Kusuma Iyus, Iyus Rina Dwi Yani, Rina Dwi Sa'adah, Nurul Suhendra, Diky Rahmat Tri Pratomo