Article Per Year (5 Year)
p-Index From 2021 - 2026
0
P-Index
This Author published in this journals
All Journal International Journal of Power Electronics and Drive Systems (IJPEDS) Jurnal Teknik Mesin Jurnal Teknik Mesin pendidikan, science, teknologi, dan ekonomi Prosiding Seminar Nasional Rekayasa Teknologi Industri dan Informasi ReTII
Hendriwan Fahmi
Institut Teknologi Padang
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Public Health Transportation

Published : 27 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 27 Documents
Search

 1   2   3 
Effect of Fibres Length on Acoustic Properties of Betel Nut Husk (Areca Nut Husk) Fibers–Reinforced Epoxy Composites Putri Pratiwi; Hendriwan Fahmi; Georgery Saputra
Jurnal Teknik Mesin Vol 9 No 2 (2019): Jurnal Teknik Mesin Vol.9 No.2 October 2019
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2019.v9.i2.46-51

Abstract

The objective of this research is to determine the acoustic properties (sound absorption coefficient) in a various length of betelnut fibers. Betel nut fibers were obtain from local plantation in Padang as agro waste material and potentially used as sound absorber. In this study, we used betel nut fibers as a filler of composites and epoxy resin as a matrix using the ratio of volume fraction of 40% : 60%. We used three variations of fibers length such as 1 cm, 2 cm and 3 cm. The sound absorption coefficient of composites was studied using impedance tube method with 1000 Hz, 1500 Hz, 2000 Hz, and 2500 Hz frequency. The results showed that composite using 3 cm fibers length of betelnut husk would give the optimum sound absorption coefficient at 1500 Hz frequency, but composites with 1 cm fibers length showed a great performance as sound absorbing materials at various sound frequencies that have been tested. From this research shown that betelnut fiber composite give the optimum sound absorption coefficient at various fibres length and can be used as sound absorption materials, based on ISO standard 11654:1997.
ANALISA KEKERASAN DAN FRACTURE TOUGHNESS ALUMINA DIPERKUAT SERBUK ALUMINIUM DAN TEMBAGA Hendriwan Fahmi
Jurnal Teknik Mesin Vol 5 No 1 (2015): Jurnal Teknik Mesin Vol.5 No.1 April 2015
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2015.v5.i1.42-48

Abstract

Composite is a big picture in the development of today's materials science engineering. This material seems to be able to replace the role of metallic and non-metallic materials. The purpose of this study was to determine the effect of the addition of aluminum powder (Al) and copper (Cu) in the matrix Alumina (Al2O3) on the hardness and fracture toughness values. Aluminum powder is made with water atomization process and copper powder prepared by centrifugal atomization process. Aluminum powder and copper followed by a sifting process using mesh size 50-100 to get a powder size of 125-150 µm. From the steps followed by the process of mixing the composition variation of 100% volume of Al2O3, 90% Al2O3 + 10% Volume weight of Al and Cu, 80% Volume Al2O3 + 20 wt% Al and Cu, 70% Volume Al2O3 + 30 wt% Al and Cu, 60% Volume Al2O3 + 40 wt% Al and Cu. Then do the process of compacting pressure with of 140 MPa. Sintering process is done using a furnace with a temperature of 1150 oC with Heating rate 5° C / min. In this study, the highest value is 84 HRc hardness and average of 76.83 HRc. and fracture toughness (K1C) highest this 1,388 obtained at 60% volume composition Al2O3 + 40 wt% Al and Cu with an average bending stress of 1,227 MPa.m1 / 2 .
PENGARUH PENAMBAHAN SERBUK SILIKA PADA MATRIK ALUMINIUM TERHADAP FRACTURE TUOGHNESS Hendriwan Fahmi; Angga Prima Syokti
Jurnal Teknik Mesin Vol 5 No 2 (2015): Jurnal Teknik Mesin Vol.5 No.2 October 2015
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2015.v5.i2.78-82

Abstract

Fracture toughness is one of the process to determine the resistance of a material to the loading and distributing crack on the specimen. Testing was conducted at the Laboratory Padang Institute of Technology, which this process can be done in several stages - stages that have been planned based on the work steps as follows: aluminum smelting process, followed by the screening process so as to get the size of 200 mesh powder, then the process burning rice husks, followed by filtration to become the size of 200 mesh which is also known as silica powder. From the above steps followed by a mixing process which is used as a means of stirring the materials we create. By using three temperature is 420 ° C, 480 ° C, 540 ° C by using some variation of the volume of 100% aluminum, 90% of the volume of aluminum silica + 10% volume, 80% by volume of aluminum silica + 20% volume, 70% by volume of aluminum + 30% of the volume of silica, 60% by volume of aluminum silica + 40% volume, the added alcohol content of 5% to 70%, then after we did the mixing, then we go with the process of compacting the printing process specimen with a predetermined size and with pressure of 140 MPa, of some of the process then we do the sintering process by using a furnace with a temperature of 420 ºC, 480 ºC, 540 ºC, and then we go to the last process that Fracture toughness testing to determine toughness. So from this test found the best composition is the composition of 80% by volume of aluminum silica + 20% volume with the lowest temperature of 420 ºC and is a composition of 60% by volume of aluminum silica + 40% volume with temperature 480 ºC. of the above results, we can see that the price K1C dependent on energy absorption in the event of breach of the specimen.
PENGARUH VARIASI KOMPOSISI KOMPOSIT RESIN EPOXY/SERAT GLASS DAN SERAT DAUN NANAS TERHADAP KETANGGUHAN Hendriwan Fahmi; Nur Arifin
Jurnal Teknik Mesin Vol 4 No 2 (2014): Jurnal Teknik Mesin Vol.4 No.2 October 2014
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2014.v4.i2.84-89

Abstract

Fiber of pineapple leaf as one of the natural fiber which is very abundant availability at this time, but is no longer used and disposed of as waste. Though pineapple leaf fiber can be used as a natural alternative to fiber composite materials. The purpose of this study was to determine the effect of variations in the composition of the composite epoxy / glass fiber and pineapple leaf fiber on impact toughness, and also can utilize waste pineapple leaf fibers. Pineapple leaf fiber combined with glass fibers in order to obtain optimum strength and toughness. Variation of weight percent composition of the composite is 90:10, 80:20, 70:30, 60:40. The process of manufacture of the specimen is done manually and stirring pineapple leaf fiber and glass fiber with resin done evenly and constantly. Pouring resin into the mold do without the absence of pressure. Of the results impact test be obtained impact energy and price of impact average for the composite with composition 90:10 = 0.12 J for impact energy and for price impact 0.003 J/mm2 , 80:20 = 0.0013 J for impact energy and price impact 0.0033 J/mm2 , 70:30 = 0.32 J for impact energy and price impact of 0.008 J/mm2 , 60:40 = 0.31 J for impact energy and price impact 0.0077. Toughness is highest obtained on the 70:30 composition. From the test results it can be concluded that the natural fiber – reinforced composites and glass fiber can improve the toughness in the shock loads
OPTIMASI VARIASI WAKTU PENGERINGAN DAN KECEPATAN TIUPAN UDARA PEMBAKARAN PADA PROSES PRODUKSI SILIKA DARI SEKAM PADI Hendriwan Fahmi; Ronaldi
Jurnal Teknik Mesin Vol 3 No 2 (2013): Jurnal Teknik Mesin Vol.3 No.2 October 2013
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2013.v3.i2.49-54

Abstract

West sumatera is farmland so there are many rice miling industries.It produces hull of rice everyday and becomes disadvantages waste.Hull of rice contains silica has the shape of amorf terhidrat (Houston, 1972). Silica use as a material for producing ceremics. For producing dust from hull of rice which contains silica will be done by camouflage process and for testing silica composition in hull of rice dust is used XRF method. From the result of testing by using XRF method so be gotten the highest data from the hull of the rice silica in example with long drying variation as long as 2 hours with wind of blowing speed variation is 0.25 m/s with percentage Si02 is 98.12%.
Analisa Prestasi Pengering Padi Jenis Fluidisasi Terintegrasi Dengan Tungku Biomassa Dua Tingkat M Yahya; Hendriwan Fahmi; Syafrul Hadi; Edison Edison
Retii Prosiding Seminar Nasional ReTII ke-13 2018
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Penelitian ini difokuskan dengan analisa prestasi kepada alat pengering fluidisasi terintegrasi dengan tungku biomassa dua tingkat untuk mengeringkan padi. Pengering ini terdiri dari beberapa komponen utama yaitu tungku biomassa dua tingkat, kolom pengering (fluidized bed), siklon dan blower. Padi telah dikeringkan dari 14 kg dengan kadar air 24 % (basis basah) kepada kadar air 14% (basis basah) selama 45 minit, dengan temperatur dan kelembapan relatif rata-rata, masing-masing adalah  59,6oC dan 18.8%.  Laju penguapan air spesifik (SMER) rata-rata didapati sekitar 0,310 kg/kWh. Konsumsi energi spesifik (SEC), konsumsi energi listrik spesifik (SEEC) dan konsumsi energi termal spesifik (STEC) rata-rata, masing-masing didapati sebanyak 3,50 kWh/kg,  1,996 kWh/kg  dan  1,532 kWh/kg.  Sementara itu efisiensi termal sistem pengering rata-rata didapati sebesar  20,78%.
Analisa ANALISA STRUKTUR MIKRO, KANDUNGAN LIGNIN DAN HEMISELULOSA SERAT PELEPAH SAWIT AKIBAT PERLAKUAN ALKALI Hendriwan Fahmi; syaiful malik jenifer; anrinal anrinal
Retii 2020: Prosiding Seminar Nasional ReTII ke-15
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The use of natural fibers from palm frond fibers in the manufacture of composite materials has its advantages, including high specific strength and modulus, low price, low density, lower population emissions, and is common or recyclable. The production of the material starts from the natural decomposition of the palm frond fibers. After the palm fronds have rotted, the process of extracting fibers is carried out using a cloth brush or beating them against the board so that the dirt is removed so that it gets the best fiber. Furthermore, the fibers were soaked in 5% NaOH solution for 1,2,3,4 hours and without NaOH treatment, after that, they were dried using an oven at 105 ° C. Tests carried out the lignin and hemicellulose content and the microstructure of the palm frond fibers with the effect of 5% NaOH treatment and without treatment. From the test results, it was found that the lowest lignin content was in 5% NaOH treatment for 4 hours 22.1030%, and the highest lignin content was in 5% NaOH treatment for 1 hour 29, 8694%, and the highest hemicellulose was found without NaOH treatment, namely 26.6343% and the lowest was the need for NaOH for 1 hour 22,1164%. As well as the results of research on the microstructure of palm frond fibers without treatment and with 5% NaOH treatment for 1,2,3, and 4 hours, there were cavities in the fibers. The longer the treatment, the cavities become more open
Co-Authors Abdul Latif Nurfalah Angga Prima Syokti Anrinal Anrinal Asmara Yanto Edison Edison Fajar Marda Kapur Georgery Saputra Harry Hermansyah Harry Hermansyah Idel Fitra Soni M yahya Nur Arifin Nur Arifin Pratiwi, Putri Ronaldi Sulaeman Sulaeman Ali Syafrul Hadi syaiful malik jenifer Tri Maryanto Yanto Darman