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PENGARUH PENAMBAHAN Mg DAN Sr TERHADAP KEKERASAN KOMPOSIT ADC12/nano-Al2O3 DENGAN METODE STIR CASTING Ahmad Al Kautsar; Salahuddin Junus; M Trifiananto; Imam Sholahudin; Aris Zainul Muttaqin
STATOR: Jurnal Ilmiah Teknik Mesin Vol 6 No 1 (2023): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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Metal matrix composites generally use Aluminum (Al) as its matrix because of its low density, high processing, and high ductility. Ductility is an important factor that must be possessed on the metal matrix composite because the amplifier used is rigid and brittle. Alumina (Al2O3) is used as a reinforcing particle in a metal matrix composite because it has good thermal stability and hardness as well as a high Young modulus. Aluminum-silicon alloys (Al-Si) are excellent alloys of good melting, which have a good surface, without brittleness, and are excellent for cast alloys. The addition of magnesium (Mg) resulted in a modified rate of silicone eutectic for Al-Si-Mg, with enhanced magnesium (Mg) levels, increased alloy tensile strength but a decreasing percent elongation value. Strontium (Sr) is a common element used to modify eutectic and Si-shaped phases of rough acicular into finer and rounded fibrous forms. A metal matrix composite with a nano-sized Al2O3 particle amplifier can be fabricated using stir casting method with the addition of Mg as a Al2O3 wetting agent. Test results of the addition of Mg, Sr, and nano-Al2O3 to the highest hardness of ADC12 / nano-Al2O3 composites were found in ADC12-8Mg-0.03Sr / 2.5nano-Al2O3 variation at 78.92 HRB.

PENGENDALIAN KUALITAS PROSES FABRIKASI PANEL KOMPOSIT AMPAS KOPI MENGGUNAKAN METODE TAGUCHI Raihaan .; Yuni Hermawan; Ahmad Adib Rosyadi; Mahros Darsin; Robertus Sidartawan
STATOR: Jurnal Ilmiah Teknik Mesin Vol 6 No 1 (2023): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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The use of composites has touched various fields, for example in land, sea and air transportation and household appliances. The coffee pulp particle composite panel produces new properties that are unique and affect the characteristics of mechanical strength, especially tensile strength and bending strength [7]. The standard for making good coffee pulp composite panels and producing optimal strength needs to be done [4]. To reduce the air bubbles created, a degasification process needs to be done [5]. In making composites using the hand lay-up method has several main parameters for its tensile strength, where the main parameters used are stirring speed 515 rpm, 915 rpm, 1430 rpm; duration of degasification 7.5 minutes, 10 minutes, 12.5 minutes; degasification pressure -30 kPa, -60 kPa, -90 kPa. The optimal results obtained were 24.88 MPa with an increase of 23.18% from previous studies using the initial combination.

Evaluasi Stabilitas Lambung Kapal 2 GT (Kapal Jukung) di Perairan Puger Berdasarkan Metode Krylov Sudi Widodo; Hery Indria Dwi Puspita; Wazirotus Sakinah; Rudianto Rudianto; Puranggo Ganjar Widityo; Ramli Firdaus Kusnadi
STATOR: Jurnal Ilmiah Teknik Mesin Vol 6 No 1 (2023): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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Puger is one of the areas in Jember Regency whose main commodity comes from the sea. Fishermen need means of transportation to support them in catching fish in the sea. Puger District is also famous for its beaches and is the largest fish producer in Jember Regency. Therefore, fishing boats needed that have good performance following the characteristics of Puger waters. Puger waters have a strong trend mark with high sea currents and waves. Jukung boats are ships that are often used by fishermen in Puger. However, the process of making Jukung boats still uses conventional methods, which rely on knowledge/experience from their ancestors. The basis for making Jukung ships is mostly still not the correct procedures such as designing main dimensions, designs, and others. The impact of this affects the level of optimization of the feasibility of fishing vessels. Based on this, further studies are needed to evaluate the stability of the Jukung. This evaluation expected to be a reference regarding the level of security and comfort of the Jukung boat for the safety of the fishermen. The method used in evaluating stability is using the Krylov method. Based on the test results obtained stability are positive. so that the ship has the ability to be able to return to the even keel position after a trim/heel.

PENGARUH LAJU TEMPERATUR SOLIDIFIKASI TERHADAP KRISTALINITAS NANO SENG OKSIDA DENGAN METODE SIMULASI MOLEKULAR DINAMIK Novel Bagas Satrio Wibowo; Sumarji .; Rahma Rei Sakura; Dedi Dwilaksana; Robertoes Koekoeh KW; Hary Sutjahjono; M Asrofi
STATOR: Jurnal Ilmiah Teknik Mesin Vol 6 No 1 (2023): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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The presence of nano technology has an important role in utilizing a material, considering the use of nanotechnology in Indonesia has been applied in various fields, in the formation of nano zinc oxide (ZnO) there is a solidification process where this process is the final stage in ZnO nano formation. In the dynamic molecular simulation method, the nano ZnO solidification process will be observed with variations in the solidification temperature rates of 1010K/s, 1011K/s, 1012K/s, using LAMMPS software (Large-scale atomic / molecular massively parallel simulators) and OVITO as Help software from the results of the simulation process and VESTA-JP Minerals. From the simulation results, it can be concluded that the greater the solid temperature rate value the lower the nano ZnO crystallinity will be (amorphous).

PENGARUH PARAMETER WIRE CUT EDM TERHADAP LAJU PEMBUANGAN MATERIAL DAN KEAUSAN KAWAT M Fahrur Rozy Hentihu; Dhimas Ilhamsyah; Franciscus Xaverius Kristianta; Ahmad Adib Rosyadi; Hari Arbiantara Basuki
STATOR: Jurnal Ilmiah Teknik Mesin Vol 6 No 1 (2023): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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To improve the performance of the WEDM process, it is necessary to adjust the WEDM parameter settings to optimize the material removal rate (MRR) by decreasing the electrode wire wear (TWR) value. Using SKD 61 steel as the material, the impact of peak current, voltage open, and wire tension on material removal rate and tool wear ratio is used to estimate the ideal level parameters. The study's findings should be able to offer suitable parameter settings for WEDM work. Peak current (Ip) of 63.7%, wire tension of 31.4%, and open voltage of up to 1.9% are the machining parameters that impact the material removal rate (MRR) in the wire cut electrical discharge machine process sequentially. Open voltage, which contributes 54.4%, the wire tension parameter, which contributes 36.5%, and the peak current (Ip) parameter, which contributes 7.8%, are the machining parameters that have the most significant cumulative influence on the tool wear ratio (TWR). Peak current parameter at level 3 (9A), open voltage parameter at level 1 (5V), and wire tension parameter at level 2 (8N) are the ideal settings for MRR and TWR, resulting in MRR values of 9.861 mm3/min and TWR as high as 0.078. The study's findings usually show that higher wire tension and peak currents enhance material removal rates because the jumps of sparks produce tremendous energy. In contrast to how to open voltage and wire tension affect the wear value of the wire, thicker wires erode more quickly because more tremendous energy is generated, necessitating ideal conditions for both responses. The results of the optimization of the two responses are produced by raising the maximum peak current, lowering the minimum open voltage, and figuring out the ideal wire tension. Keywords: Wire Cut Electrical Discharge Machine, Material Removal Rate, Tool Wear Ratio.

KAJIAN REPARASI LAMBUNG KAPAL TONGKANG SML 05 DENGAN METODE SANDBLASTING DAN PAINTING Amjad Mulkus Fadlurrohman; Pratama Yuli Arianto; Rudianto .
STATOR: Jurnal Ilmiah Teknik Mesin Vol 6 No 1 (2023): JURNAL STATOR
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The shipping industry is one of the future industries that has a major role in development because it can grow other maritime sectors to create new economic growth. Based on this, a study of hull repair is needed to support related industries. Hull repair cannot be separated from the sandblasting and painting processes. Sandblasting and painting are modern methods that aim to protect the hull from damage that can affect the life of the ship. The advantage obtained when the sandblasting and painting process meets the standards is that the repair results are more optimal to minimize shipyard expanses. In this study, the sandblasting process has followed the standards both at each stage and the calculation of estimated material requirements on the flat bottom, vertical side underwater, and topside position. In the painting study, the flat bottom and vertical side underwater position met the minimum requirements for paint, while the top side had a shortfall compared to the calculation of the estimated requirement of 8.8 liters.

PENGARUH VARIASI DIAMETER TERHADAP DISTRIBUSI TEMPERATUR PADA MESO COMBUSTOR DENGAN SUDDEN EXPANSION Prabowo Restu Eranio; Rosyadi Adib Ahmad; Syuhri Ahmad; Intan Hardiatama; Andi Sanata; Skriptyan Noor HS; M Edoward Ramadhan
STATOR: Jurnal Ilmiah Teknik Mesin Vol 6 No 1 (2023): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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Meningkatkan distribusi temperatur pada meso combustor merupakan cara yang efektif dalam meningkatkan efisiensi sistem pembangkit daya micro TPV (thermophotovoltaic). Diameter combustor sangat mempengaruhi distribusi temperatur pada combustor. Tujuan dari penelitian dalam karya tulis ilmiah ini adalah untuk mengamati pengaruh variasi diameter combustor terhadap temperatur dengan mengukur temperatur dinding (Tw) dan ruang bakar (Ti) pada tiga variasi diameter outlet (Do) combustor berukuran 5 mm, 5,5 mm dan 6 mm dengan diameter inlet (Di) yang konstan sebesar 4,5 mm. Hasil penelitian menunjukan bahwa diameter meso combustor sangat mempengaruhi suhu pada dinding dan ruang bakar. Suhu pada dinding combustor (Tw) dipengaruhi oleh besaran surface to volume ratio karena variasi diameter pada combustor, dimana semakin besar nilai rasio (Do combustor kecil) akan menghasilkan suhu dinding yang lebih tinggi, namun dengan heat losses yang besar. Sedangkan suhu pada ruang bakar combustor (Ti) dipengaruhi oleh besarnya vortex yang terbentuk di area sudden expansion. Sudden expansion berukuran besar (Do combustor besar) akan membentuk vortex yang besar sehingga meningkatkan suhu ruang bakar, namun membuat nyala api semakin tidak stabil karena massa berlebih yang dibawa oleh vortex ke dalam zona reaksi.

ANALISIS KRISTALINITAS NANO ALPHA-ALUMINA (SPHERE) PADA PROSES PENDINGINAN MENGGUNAKAN SIMULASI DINAMIKA MOLEKUL Ivan Permadi Mahfud; Agus Triono; Santoso Mulyadi; Gaguk Jati Sukamto; M Dimyati Nashrullah
STATOR: Jurnal Ilmiah Teknik Mesin Vol 6 No 1 (2023): JURNAL STATOR
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Nanomaterials are nano-meter (nm) sized materials, and have become increasingly important in the past decade because of their special characteristics compared to larger materials [3]. In the process of forming nano alumina material there are several phases, one of which is a very important solidification process in the formation of nano alumina. In this study using computer simulations with the help of LAMMPS applications (Large-scale atomic molecular massively parallel simulators) and OVITO as supporting applications. Variations used in the Solidification Rate are 1010 K/s, 1011 K/s, 1012 K/s, and after simulating the variation of 1010 K/s produces the highest radial distribution function with a peak value of around 550.000, while at the rate of 1011 K/s peak the radial distribution function is 45.000 and the variation of 1012 K/s produces a peak of 15.000

Analisis Ergonomi pada Operator Hand Tractor Menggunakan Metode Rapid Upper Limb Assesment (RULA) Oktafian Nanda Nusila; Dwi Djumhariyanto; Digdo Listyadi Setyawan; Nasrul Ilminafik; Nur Koyim Kustanto
STATOR: Jurnal Ilmiah Teknik Mesin Vol 6 No 1 (2023): JURNAL STATOR
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In high technological times the use of agricultural tools with modern machinery helped accelerate the processing of agricultural production. One of the most common and most commonly used tools is the Tractor. Tractor is a motorized tool that has the ability to preparation the soil. Application of tractor to preparation the soil is mostly done by farmers. A lot of used tractors is the hand tractor. Unsuitableof factor of tractor design to operator and land condition has caused many problems related to comfort, safety and health of work. Handlebar on the hand tractor is still less comfortable and ergonomic considered by the operator. This study aims to identify hand tractor operator complaints of inconvenience in working using RULA analysis of CATIA V5R17 software. Based on anthropometry percentile calculations, the result 1100 mm handlebar height, 650 mm handlebar width, and the distance of the turning lever to a 120 mm handlebar. The percentiles used are 5, 50, and 95 presentations using CATIA V5R17.

ANALISIS KEKASARAN PERMUKAAN PADA PROSES PENGEBORAN ALUMINIUM 6061 Jannah, Betriqil; Sanata, Andi; Koekoeh KW, Robertoes; Junus, Salahuddin; Ramadhan, M Edoward; Sutjahjono, Hary
STATOR: Jurnal Ilmiah Teknik Mesin Vol 6 No 2 (2023): JURNAL STATOR
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This research aims to determine the influence of spindle speed, tool diameter, and coolant on the surface roughness in the process of drilling Aluminum 6061 and identify the most optimal variable. Surface roughness is significantly affected by the spindle speed variable, which contributes to 46,47% of the outcome. The coolant variable contributes 31,17%, while the tool diameter variable has the smallest percentage contribution of 9,61%. The process variables for spindle speed (535 Rpm, 865 Rpm, 1520 Rpm) resulted in surface roughness values of (1,467 μm, 1,349 μm, 2,079 μm) respectively. For the tool diameter variable (8 mm, 10 mm, 12 mm), the surface roughness values were (1,765 μm, 1,701 μm, 1,429 μm) respectively. Regarding the coolant variable (water, dromus, oil), the surface roughness values were ((1,995 μm, 1,387 μm, 1,541 μm) respectively. The most optimal surface roughness was achieved with a spindle speed of 865 Rpm, resulting in a surface roughness value of 1.349 μm. Similarly, a tool diameter of 12 mm resulted in a surface roughness value of 1.429 μm, and the use of dromus as a coolant resulted in a surface roughness value of 1.387 μm. Keywords: Surface Roughness, Drilling, Aluminum 6061

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Kab. jember,

Jawa timur

INDONESIA