Claim Missing Document
Check
Articles

Found 13 Documents
Search

PENGARUH ORIENTASI SERAT PADA KOMPOSIT RESIN POLYESTER/ SERAT DAUN NENAS TERHADAP KEKUATAN TARIK Hendriwan Fahmi; Harry Hermansyah
Jurnal Teknik Mesin (JTM) Vol 1, No 1 (2011)
Publisher : LP2M - Institut Teknologi Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (270.935 KB)

Abstract

Pineapple leaf fiber as one of the natural fiber is currently available in high abundance, but not utilized and discarded as waste. Pineapple leaf fibers but can still be used as one alternative to natural fiber composite material. Pineapple fiber orientation variation 00, 00; 450, 00; 900to influence significantly the tensile strength of the composite. There is a maximum tensile strength with orientation 00; 450. From the results obtained using natural fibers found pineapple average of stress composite with fiber orientation 00 = 37,88 N / mm2 ,00; 450= 41,81 N /mm2, 00; 900= 39,37 N / mm2, from the results of this test we can deduce the nature of fiber reinforced resin pineapple can increase the tensile strength.
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 (JTM) Vol 9, No 2 (2019)
Publisher : LP2M - Institut Teknologi Padang

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

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.
The Effect of Addition of Powder Areca Nut Midrib on Polyester Matrix to the Tensile and Bending Strength Hendriwan Fahmi; Putri Pratiwi; Tri Maryanto
Jurnal Teknik Mesin (JTM) Vol 10, No 1 (2020)
Publisher : LP2M - Institut Teknologi Padang

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

Abstract

In this life, humans certainly need a variety of equipment called material. In its development the material continues to experience progress as in early life, humans only use equipment made from simple materials such as wood, stone and others. Then move to the metal and the last to use a lot of mixture in the refinement of these materials, one form of mixed material created by humans is composite. Betel nut has a lot of powder, how to take it without damaging the areca nut plant. After the extraction of powder is applied to the areca nut, the fiber will be mixed with polyester resin as its matrix. Polyester resin is a matrix of composites. This resin is also included in thermoset resin. In the thermoset polyester the liquid resin is converted into hard and brittle solids formed by chemical cross-bonds that form very strong polymer chains. The mixture will produce composite materials which have different mechanical properties and characteristics from the forming material. Composite materials have the properties of conventional materials from the manufacturing process through inhomogeneous mixing. The purpose of this study was to determine the effect of adding areca nut powder to the polyester matrix on tensile and bending strength. Research and testing are carried out in several stages, including the manufacture of specimens. Both materials are stirred manually until both materials are fused evenly, then tensile and bending tests are carried out, data analysis and conclusions. The results of this research got the best tensile test values on composite polyester resin specimens and areca nut powder with a composition of 90%: 10% with a value of 5.09 MPa. And the results of bending which got the best bending test values are polyester resin composites and nutmeg powder with a composition of 90%: 10% with bending test values of 3.77 MPa.
The Effect of Volume Fraction on Acoustic Properties of Areca Nut Midrib Fibers Composites with Natural Adhesives Putri Pratiwi; Hendriwan Fahmi; Asmara Yanto; Idel Fitra Soni
Jurnal Teknik Mesin (JTM) Vol 10, No 2 (2020)
Publisher : LP2M - Institut Teknologi Padang

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

Abstract

Areca nut Midrib is one of agricultural waste that has many benefits to be recycled for household purposes such as plates, jars and others. Moreover, for many researchers, areca nut midrib fiber was used as a filler of composites material. From several studies it is known that this material has good potential as a filler in composites because of its good mechanical properties. In addition, this material is also considered as a good sound absorber. Therefore, this research will investigate the ability of sound absorption from this material in a various composition. We used Areca nut Midrib fibers as a filler and pine sap as a matrixof composite with a volume fraction of 70%: 30%, 75%: 25%, 80%: 20%, 85%: 15%, 90%: 10%.  The sound absorption coefficient of composites was studied using impedance tube method with 500, 1000 Hz, 1500 Hz, 2000 Hz, and 2500 Hz frequency. The results showed that at a test frequency of 500 Hz, the value of sound absorption coefficient increases with the increase of Areca nut Midrib fraction. This research shown that there is an effect of volume fraction on the acoustic properties  and Areca nut Midrib fiber composite have potential used as sound absorption materials, based on ISO standard 11654:1997.
Thermal Shock Resistance of Epoxy Reinforced Fiber Betel Nut Against the Strength of Bending and Impact Energy Hendriwan Fahmi
Jurnal Teknik Mesin (JTM) Vol 8, No 1 (2018)
Publisher : LP2M - Institut Teknologi Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (151.713 KB)

Abstract

The development of material engineering technology is now beginning to experience an increase in the utilization of natural fibers as a reinforcement in composites. The purpose of this research is to know the effect of thermal shock on bending strength and impact matrix of epoxy with betel fiber. In this study used betel fiber with a length of 1cm and epoxy resin matrix. Matrix and reinforcement composition 30%: 70% v, pinewood was soaked with 30% NaOH for 30 minutes. The composite was heated at a temperature of 1000C for 1 hour, then dipped into water with a variation of 10.15,20 cycles. Bending and impact testing based on ASTM 790 and ASTM D-265. The results showed that the highest bending strength was obtained at the thermal shock of 10 cycles of 76.75 N / mm2 and the lowest at 20 cycles of 48.26 N / mm2. At impact test at get biggest impact energy obtained at thermal shock 10 cycle that is 0,756 J and the smallest at 20 cycle that is equal to 0,060 J. This result show that bigger cycle at thermal shock hence composite strength will decrease.
PENGARUH VARIASI KOMPOSISI KOMPOSIT RESIN EPOXY/SERAT GLASS DAN SERAT DAUN NANAS TERHADAP KETANGGUHAN Hendriwan Fahmi; Nur Arifin
Jurnal Teknik Mesin (JTM) Vol 4, No 2 (2014)
Publisher : LP2M - Institut Teknologi Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (384.001 KB)

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.
Effect of Aluminium and Copper Powder Addition in Alumina Matrix on Bending Strength Hendriwan Fahmi; Sulaeman Ali
Jurnal Teknik Mesin (JTM) Vol 6, No 1 (2016)
Publisher : LP2M - Institut Teknologi Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (887.131 KB)

Abstract

OPTIMASI VARIASI WAKTU PENGERINGAN DAN KECEPATAN TIUPAN UDARA PEMBAKARAN PADA PROSES PRODUKSI SILIKA DARI SEKAM PADI Hendriwan Fahmi
Jurnal Teknik Mesin (JTM) Vol 3, No 2 (2013)
Publisher : LP2M - Institut Teknologi Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (193.599 KB)

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%.
PENGARUH PENAMBAHAN SERBUK SILIKA PADA MATRIK ALUMINIUM TERHADAP FRACTURE TUOGHNESS Hendriwan Fahmi; Angga Prima Syokti
Jurnal Teknik Mesin (JTM) Vol 5, No 2 (2015)
Publisher : LP2M - Institut Teknologi Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (47.894 KB)

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.
ANALISA KEKERASAN DAN FRACTURE TOUGHNESS ALUMINA DIPERKUAT SERBUK ALUMINIUM DAN TEMBAGA Hendriwan Fahmi
Jurnal Teknik Mesin (JTM) Vol 5, No 1 (2015)
Publisher : LP2M - Institut Teknologi Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (81.61 KB)

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 o C with Heating rate 5° C / min. In this study, the highest value is 84 HRc hardnessand 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 .