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All Journal Rekayasa Mesin ARIKA Automotive Experiences
Nevada M.J. Nanulaitta
Politeknik Negeri Ambon
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Pengaruh Fraksi Volume Serat Empulur Sagu (Metroxylon sp) dan Presentase Alkali terhadap Pengujian Impak serta Absorpsi Air pada Komposit Berserat Sagu Nanulaitta, Nevada Mario; Soeprapto, Wahyono; Soenoko, Rudy
Rekayasa Mesin Vol 9, No 3 (2018)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (364.114 KB) | DOI: 10.21776/ub.jrm.2018.009.03.2

Abstract

Human necessities for good material to support daily activity are growing up, especially eco-friendly material.  Applications such as decoration, interior, until the furniture increased along with the population growth. Sago (Metroxylon sp) as one of the plants and also as one of the staple food in Maluku, this plant thrives in Maluku. To be processed into sago that is ready to eat required the process of extraction of sago tree (Metroxylon sp) trunk that leaves waste sago pith (fiber). In this research the utilization of waste fiber sago pith in use as composite amplifier with matrix is sago starch. Research using natural ingredients as composite maker, is expected to get composite that have good impact strength and good water absorption rate. The composites were made using hand lay up method with variation of volume fraction of sago pith fiber is 30% and 50% with NaOH solution and aquades in alkaline process with percentage comparison of 3%, 5%, 7% and 9% for 120 minutes immersion time. The results of this study found the best impact strength on the composite with a variation of fiber volume of 50% with alkaline process 9% with the highest value on the energy absorbed composite 6,9303 (J) with impact strength 0.0693 (J/mm2). The best water absorption rate is at 8.67% occurring on a 50% fiber fraction variation with a percentage of 9% NaOH alkali process.
Analisa Lanjut Hasil Uji Kekuatan Tarik Besi Beton Untuk Struktur Beton Jembatan Waihattu Melalui Perbandingan Perhitungan Manual Dengan Program Minitab Versi 13 Steanly R.R. Pattiselanno; Nanse H. Pattiasina; Nevada M.J. Nanulaitta
ARIKA Vol 7 No 2 (2013)
Publisher : Industrial Engineering Study Program, Pattimura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (10721.191 KB)

Abstract

Tujuan penelitian adalah menganalisa lanjut hasil uji kekuatan tarik besi beton untuk tulangan beton jembatan melalui perbandingan hasil perhitungan manual dengan perhitungan program miniteb versi 13 untuk tingkat kepercayaan 95% dan 99%. Perbandingan hasil yang dilakukan melalui pendekatan tahapan perhitungan manual adalah menghitung mean sampel, deviasi standar sampel dan estimasi internal mean populasi, serta tahapan tahapan minitab versi 13 adalah uji normalitas dan perhitungan cepat tingkat kepercayaan 95% dan 99%. Penilaian dilakukan dengan menggunakan prosedur jumlah sampel kecil (n<30). Untuk sampel berdiameter ( ) 10 mm, 16 mm, 19 mm dan 22 mm. Berdasarkan teknik analisa dan metode estimasi titik dan metode estimasi internal, sebagai besaran perbedaan untuk interval kepercayaan Ci = 95%, berkisar antara 0,001% s/d 0,239%, besaran perbedaan untuk interval kepercayaan ci = 99% berkisar antara 0,002% s/d 0550% dan pebedaan besaran tegangan tarik antara daerah interval kepercayaan ci=95% berkisar antara 0.001% s/d 0.315%.
Analisa Keragaman Nilai Kekerasan Baja St-42 Melalui Proses Karburasi Menggunakan Komposisi BaCO3 Dan Carbon Dengan Variasi Waktu Penahanan Nanse H. Pattiasina; Nevada J.M. Nanulaitta; Steanly R.R. Pattiselanno
ARIKA Vol 5 No 2 (2011)
Publisher : Industrial Engineering Study Program, Pattimura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (829.025 KB)

Abstract

Pack carburizing is a method of thermo chemical treatment, when carbon dissolved in steel surfaces, revolve 0.3% - 0.9% with temperature between 825 oC - 925 oC, and keep it at several time and then continued with quenching process using water, oil, air or salt. This research had arranged to test the hardness of low carbon steel (ST-42) with 40% of BaCO3, and 60% of Carbon, before and after carburizing process in 3 type of holding time: 15, 30, and 50 minutes. Based on results, the best combination to reach a higher value of hardness provides by combination of after carburizing process and 50 minutes of holding time. Later, an extensive experiment by 2 hours of burning had shown an increase level of hardness up to 365% from the initial condition which proves the quality of this best treatment combination.
Analisis Perbandingan Komposisi Karbon Dan Bubuk Tulang Sapi Dalam Proses Karburasi Padat Untuk Mendapatkan Nilai Kekerasan Tertinggi Pada Baja Karbon S-35 C Nevada J.M. Nanulaitta; Eka R. M. A. P. Lilipaly
ARIKA Vol 5 No 2 (2011)
Publisher : Industrial Engineering Study Program, Pattimura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (293.536 KB)

Abstract

S-35 C, is a low steel carbon type with 0,30% - 0,35% carbon composition, which has a low hardness. This matter can be overcome by changing the hardness of this steel through heat treatment process. Heat treatment method used in this experiment is pack carburizing method. Experiment results showed that with composition of 500 g of carbon and 0% beef bones with 15 minutes holding time, the hardness number increased as much as 116.90 HRC, there was 20.54 HRC number increased. With 10% of cow bones composition, hardness number became 118.39 HRC and 20.40 HRC number increased. HRC number became 122.20 and increased by 24.38 on 20% composition, and on 30% the hardness value became 130.36 HRC, increased until 32.05 HRC number. 40% composition showed increasing hardness number up to 133.34 HRC, with 35.08 HRC increased. And 50% composition showed 141.29 HRC number, increased until 43.95 HRC. 50% composition produce the highest increase of hardness number, this verified that the higher composition of cow bones makes higher increasing of hardness number in a heat treatment process deliver a harder steel, and also prove that beef bones can be used as a catalyst in pack carburizing process.
Performance and Emissions Analysis of BE85-Gasoline Blends on Spark Ignition Engine Hendry Y. Nanlohy; Helen Riupassa; Marthina Mini; Herman Tjolleng Taba; Basri Katjo; Nevada JM Nanulaitta; Masaki Yamaguchi
Automotive Experiences Vol 5 No 1 (2022)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (771.632 KB) | DOI: 10.31603/ae.6116

Abstract

This study aims to reveal the performance and exhaust emissions of a spark ignition (SI) engine fueled by a gasoline-bioethanol mixture. The main performance characteristics of the SI engine tested are torque, power output; thermal efficiency, brake specific fuel consumption, and brake mean effective pressure. Meanwhile, the exhaust emissions seen are carbon monoxide and hydrocarbons. The test is carried out by comparing the performance of the SI engine under standard conditions without modification with gasoline fuel, with the SI engine with modification with 85% bioethanol fuel. The mass flow of fuel is regulated by modifying the carburetor choke at 3/4 and 7/8. The results show that although slightly lower than gasoline, in general, it can be seen that bioethanol can improve SI engine performance and produce environmentally friendly exhaust emissions.
Co-Authors Basri Katjo Eka R. M. A. P. Lilipaly Helen Riupassa Hendry Y. Nanlohy Herman Tjolleng Taba Marthina Mini Masaki Yamaguchi Nanse H. Pattiasina Rudy Soenoko Soeprapto, Wahyono Steanly R.R. Pattiselanno Steanly R.R. Pattiselanno