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All Journal Sistem : Jurnal Ilmu-Ilmu Teknik Journal of Mechanical Engineering, Science, and Innovation Jurnal Rekayasa Mesin
Arifianti, Lailatus Sa'diyah Yuniar
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Aerospace Engineering Automotive Engineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Evaluating the Impact of Alternative Material-Based Catalytic Converters on Automotive Exhaust Emissions Ariyanto, Sudirman Rizki; Warju, Warju; Arifianti, Lailatus Sa'diyah Yuniar; Komarudin, Komarudin; Nugraha, Ata Syifa'
Journal of Mechanical Engineering, Science, and Innovation Vol 5, No 1 (2025): (April)
Publisher : Mechanical Engineering Department - Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jmesi.2025.v5i1.7287

Abstract

Pollution air in cities in Indonesia, such as Jakarta, Tangerang, and Bandung, is especially caused by exhaust emissions from vehicle motorized, like carbon monoxide (CO) and hydrocarbons (HC), which originate from burning material burn the ones that don't perfect. Technological catalytic converters are used to reduce emissions, but converters made from metal have their own cost. This study evaluates exhaust Metallic Catalytic Converter (MCC) technology with alternative materials copper (Cu). The result shows that the MCC Cu exhaust system is significantly more effective in reducing CO and HC emissions compared with exhaust without the original equipment manufacturer (OEM) catalyst and exhaust. The average CO emissions are 2.13 %Vol and HC emissions are 198 ppmVol, lower compared to the second type of exhaust. Findings This shows that MCC Cu exhaust is not only more effective in reducing danger but is also more economical compared to catalytic converters made from metal noble, offering a solution sustainable and affordable for problem pollution air from vehicles.
MODEL PREDIKSI TEMPERATUR PAHAT PADA PROSES BUBUT MELALUI ANOVA DAN REGRESI Arifianti, Lailatus Sa'diyah Yuniar; Ariyanto, Sudirman Rizki; Umaroh, Susi Tri; Abdi, Ferly Isnomo; J, Mohammad R.
SISTEM Jurnal Ilmu Ilmu Teknik Vol 21 No 2 (2025): In-Press
Publisher : Fakultas Teknik Universitas Wisnuwardhana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37303/sistem.v21i2.308

Abstract

Pada proses pembubutan, temperatur tinggi sering terjadi akibat gesekan antara pahat dan benda kerja, yang berdampak pada peningkatan keausan pahat dan penurunan kualitas hasil pemesinan. Penelitian ini bertujuan untuk menganalisis pengaruh parameter proses, yaitu kecepatan putar (spindle speed), kecepatan makan (feed rate), dan kedalaman potong (depth of cut), terhadap temperatur pahat menggunakan metode analisis variansi (ANOVA) dan regresi linier berganda. Percobaan dilakukan sebanyak 16 kali berdasarkan rancangan faktorial penuh 2³ dengan dua replikasi. Hasil analisis menunjukkan bahwa feed rate dan depth of cut berpengaruh signifikan terhadap temperatur pahat, sedangkan spindle speed tidak memberikan pengaruh yang signifikan secara individual. Namun, interaksi antara faktor-faktor tersebut terbukti memberikan pengaruh yang signifikan terhadap temperatur. Model regresi linier berganda yang dikembangkan memiliki nilai koefisien determinasi (R²) sebesar 93,99%, yang menunjukkan kecukupan model untuk prediksi. Temuan ini memberikan kontribusi dalam pengendalian parameter proses untuk meminimalkan temperatur pahat, memperpanjang umur pahat, serta meningkatkan efisiensi dan kualitas dalam proses pembubutan.
PEMBUATAN CETAKAN SENDOK PUDING DENGAN INJECTION MOLDING DARI MATERIAL POLYLACTIC ACID (PLA) DAN PATI SINGKONG Al Fath Hasby Ash Shiddiqy, Yhun; Ganda, Andita Nataria Fitri; Wulandari, Diah; Arifianti, Lailatus Sa'diyah Yuniar
Jurnal Rekayasa Mesin Vol 10 No 03 (2025): JRM Desember 2025
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jrm.v10i03.74386

Abstract

Plastic is widely used in Indonesia, but its non-biodegradable nature causes accumulation and environmental pollution. As a solution, more eco-friendly bioplastics have been developed. This study aims to produce and analyze pudding spoon molds made from Polylactic Acid (PLA) and cassava starch using the injection molding method. The process began with product and mold design using Autodesk Fusion 360 with product dimensions of 125.5 × 25.2 × 2 mm and mold dimensions of 132 × 60 × 35.6 mm. Mold Flow simulation was conducted to analyze parameters such as fill confidence, visual defects, warpage, air traps, and deflection. The mold was manufactured using CNC machining with aluminum 5052 material. The PLA and cassava starch mixtures were varied, heated at a mold temperature of 160 °C and injection temperature of 190 °C, with a cooling time of approximately 5 minutes. The comparison between simulation and actual results showed dimensional differences for each material variation. The largest deviation occurred at a ratio of 40% PLA and 60% cassava starch, reaching 14.9%, while the best result was obtained at a ratio of 50% PLA and 50% cassava starch with only 0.72% deviation from the initial design. This study indicates that material composition significantly affects the dimensional quality of bioplastic products produced through the injection molding process.
Co-Authors Al Fath Hasby Ash Shiddiqy, Yhun Ariyanto, Sudirman Rizki Diah Wulandari Ferly Isnomo Abdi Ganda, Andita Nataria Fitri J, Mohammad R. Komarudin Komarudin Nugraha, Ata Syifa' Umaroh, Susi Tri WARJU