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All Journal Dinamika : Jurnal Teknik Mesin Jurnal Alat Berat Jurnal Pendidikan Teknik Mesin
Sidik, M. Farhan
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Automotive Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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ANALYSIS OF THE EFFECT OF NaOH PERCENTAGE ON THE TENSILE STRENGTH OF SISAL FIBER (AGAVE SISALANA) AND POLYURETHANE COMPOSITES USING THE COMPRESSION MOLDING METHOD paundra, fajar; Sidik, M. Farhan; Muhyi, Abdul; Nurullah, Fajar Perdana; Pujiyulianto, Eko; Syanur, Farid Nanda
Jurnal Pendidikan Teknik Mesin Vol. 24 No. 1 (2024): June 2024
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/vbwm5m25

Abstract

The percentage of NaOH is one of the parameters that greatly affects the sisal fiber composite (Agave Sisalana). The purpose of this study was to observe and analyze the effect of the percentage of NaOH on the tensile strength of sisal fiber composites (Agave Sisalana). The materials used are sisal fiber (Agave Sisalana) and polyurethane resin at various percentages of NaOH, namely without treatment (0%), 4%, 7%, and 10% with soaking time for 2 hours and drying in the sun for a maximum of three days or until the fiber is completely dry. Composite manufacturing was carried out using the compression molding method for 24 hours at a pressure of 50 bar. The tests carried out in this study were tensile tests referring to the ASTM D 638 standard. The percentage of NaOH without treatment (0%) has the lowest maximum tensile value of 6.688 MPa, while the percentage of 7% NaOH has the highest maximum tensile strength value of 11.821 MPa. Then, the percentage of NaOH without treatment (0%) has the lowest maximum elastic modulus value of 0.072 GPa, and the highest maximum elastic modulus value of 0.152 GPa is also found at 7% NaOH percentage.
Perawatan Chain and Scraper Bucket System pada Reclaimer Limestone di Perusahaan Semen Sidik, M. Farhan; Fatrullah, Ahmad Aldi; Wicaksono, Damardjaja Ariyakti; Hidayat, Roni; Discha Ahmad Afriyan, Nanda; Abbas, M. Fajjri; Paundra, Fajar
JURNAL ALAT BERAT Vol 1 No 2 (2024): Juli 2024
Publisher : Politeknik Negeri Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/jab.v1i2.29

Abstract

Chain and scraper bucket system merupakan salah satu komponen utama pada reclaimer limestone. Chain and scraper bucket system berfungsi untuk menggaruk material limestone dengan menggunakan bucket scraper yang digerakkan oleh motor dan kemudian mengarahkan material tersebut ke dalam belt conveyor. Penelitian ini bertujuan untuk mengetahui metode perawatan chain and scraper bucket system pada reclaimer limestone di perusahaan semen. Metode yang akan digunakan dalam pengumpulan sebuah data adalah pengenalan dan observasi, wawancara dan diskusi, studi literatur dan pengambilan data di lapangan. Hasil penelitian ini menunjukkan bahwa preventive maintenance perlu diterapkan pada reclaimer limestone di perusahaan semen untuk memastikan mesin bekerja optimal. Wawancara dengan teknisi dan manajer serta data engineering dan pemeliharaan menunjukkan penurunan signifikan dalam kerusakan chain and scraper bucket system setelah preventive maintenance diterapkan. Studi literatur mendukung bahwa inspeksi visual, pendengaran, dan penggunaan alat ukur getaran serta thermometer inframerah efektif mengurangi downtime dan biaya perbaikan. Pelumasan dengan grease mobile gear EP2 pada bearing head dan tail sprocket mencegah keausan. Inspeksi mingguan membantu mendeteksi masalah dini dan memungkinkan tindakan korektif cepat, memastikan operasional yang lancar. Preventive maintenance esensial untuk menjaga efisiensi dan mengurangi biaya serta downtime.
ANALYSIS OF THE EFFECT OF VOLUME FRACTION VARIATION ON TENSILE AND BENDING STRENGTH OF COMPOSITE FIBER COMBINATION OF PINEAPPLE LEAVES AND FIBERGLASS WITH POLYESTER RESIN MATRIX BY COMPRESSION MOLDING METHOD Paundra, Fajar; Simatupang, Valentino Hasael; Muhyi, Abdul; Sidik, M. Farhan; Maulana, Sena
DINAMIKA : Jurnal Teknik Mesin Vol 9, No 1 (2024): Dinamika : Jurnal Teknik Mesin
Publisher : Program Studi Teknik Mesin Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/dinamik.v9i1.7920

Abstract

Pineapple leaf fiber is a waste that is widely found on the island of Sumatra and its potential utilization has not been maximized. Pineapple leaf fiber has potential as a constituent of natural fiber composites. This study aims to determine the effect of volume fraction variation on tensile and bending strength reinforced with pineapple leaf fiber and fiberglass. The composite manufacturing process uses the compression molding method for 24 hours with a pressure of 50 bar and is given a variation of 70% polyester resin, 25% fiberglass, 20%, 15%, 10%, 5%, and 25%, 20%, 15%, 10%, 5% pineapple leaf fiber. After completion of the composite manufacture, density and porosity testing was carried out with ASTM C271 standards, tensile testing was carried out using D3930 standards and bending testing using D790 standards. The lowest density test results and the highest porosity in composites with 70% resin variation, 25% fiberglass, 5% pineapple leaf fiber with a value of 0.87 gr/cm3 - 7.80% and the highest density value and the lowest porosity with 70% resin variation, 5% fiberglass, 25% pineapple leaf fiber with a value of 1.81 gr/cm3 - 1.53%. The highest tensile strength test results in the variation of 5% fiberglass volume fraction 25% pineapple leaf fiber of 237.76 MPa, and the lowest value in the variation of 25% fiberglass volume fraction 5% pineapple leaf fiber of 98.37 MPa. And the highest bending test was obtained in the variation of the volume fraction of 5% fiberglass 25% pineapple leaf fiber at 332.14 MPa, and the lowest value was obtained in the variation of 25% fiberglass 5% pineapple leaf fiber at 194.95 MPa.
Co-Authors Abbas, M. Fajjri Discha Ahmad Afriyan, Nanda Fatrullah, Ahmad Aldi Maulana, Sena Muhyi, Abdul Nurullah, Fajar Perdana Paundra, Fajar Pujiyulianto, Eko Roni Hidayat Simatupang, Valentino Hasael SYANUR, FARID NANDA Wicaksono, Damardjaja Ariyakti