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All Journal Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Rekayasa Mesin Journal of Engineering and Management in Industrial System International Journal of Mechanical Engineering Technologies and Applications (MECHTA)
Femiana Gapsari MF
Universitas Brawijaya
Automotive Engineering Computer Science & IT Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Pengaruh Fraksi Volume Terhadap Kekuatan Tarik dan Lentur Komposit Resin Berpenguat Serbuk Kayu Gapsari, Femiana; Setyarini, Putu Hadi
Jurnal Rekayasa Mesin Vol 1, No 2 (2010)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

On the research, composite was made from polyester with volume of filler fraction variable of 15%, 30%, 45% and the type of filler was Mahogany (Swietania mahogani). The filler measurement used was 50 mesh. Polymer matrix used was BQTN 157 unsaturated resin polyester. The tensile test of experiment specimen was based on ASTM D638 M-93. and the bending specimen was based on D790-92 Standard. The higest of tensile strength on the volume fraction of 30% that is of 2.081916 kg/mm2 . For the composite material with particle of composite material mahogany with filler volume fraction of 15% had the average flexural strength of 34.98 N/mm². On the particle with volume fraction of 30% had the highest average flexural strength of 45.6780 N/mm². The higest Modulus of Elasticity(E) and Shear Modulus (G) was owned by the composite with filler volume of 635.464 kg/mm2 dan 958.85 MPa Keywords : Composite, volume fraction, tensile strength, flexural strength
Optimasi Kualitas Hasil Pengelasan Gas Metal Arc Welding (GMAW) Baja ASTM 283 Grade A dengan RSM (Response Sufrace Methodology) Gapsari, Femiana; Sulistyorini, Dwi Hadi
Jurnal Rekayasa Mesin Vol 2, No 1 (2011)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

This research aimed at the investigation of the effect of welding current, welding voltage, and welding speed on the hardness of weldment. The material used in this research is steel ASTM 283 grade A. An optimization approach is performed in order to determine the variables combination of the welding current, voltage, welding and welding speed to maintain the weldment to be below hardness and was closer with parent metal hardness. With application Response Surface Methodology(RSM) mathematical relationship between the welding process input parameters and output variable like hardness of welded joint in order to determine the welding input parameters that lead to desired weld hardness. RSM design of experiment techniques can be very efficiently used in the optimization of welding parameters in GMAW process. Formulation of equation is done with the help of which hardness can be predicted as Y = 218.624 +10.31 I+1.614V-4.017s-1.723 I2+0.929 s2.Keywords : Optimization, Response Surface Methodology (RSM), Hardnes, GMAW.
Pengaruh Kekasaran Permukaan Terhadap Porositas Hasil Hot Dipped Galvanizing (HDG) Gapsari MF, Femiana; Setyarini, Putu Hadi; Alamsyah, Fikrul Akbar
Jurnal Rekayasa Mesin Vol 3, No 1 (2012)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

The process of Hot Dipped Galvanizing (HDG) is done in this study in order to cover steel AISI 1010. This study is aimed at investigating the influence of the variation of roughness level of specimen towards the layer thickness and the porosity of the hot dipped galvanizing of steel AISI 1010. The level of roughness of the specimen is obtained from grinding on grid 100, 500, 800, and 1000. This process causes difference in the roughness of the surface which is measured by using the Surface Roughness Test. The controlled variable is dipping temperature of 480oC. The time of hot dipped galvanizing is 6 minutes, while the time of grinding is 3 minutes. The test done in this study is non destructive test with spray test. The result showed that the porosity increased as the function of the roughness.Keywords: hot dipped galvanizing, spray test, porosity, surface roughness.
Pengaruh Kekasaran Permukaan Terhadap Ketebalan Lapisan Hasil Hot Dipped Galvanizing (HDG) Alamsyah, Fikrul Akbar; Setyarini, Putu Hadi; MF, Femiana Gapsari
Jurnal Rekayasa Mesin Vol 3, No 2 (2012)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

The process of Hot Dipped Galvanizing (HDG) is done in this study in order to cover steel AISI 1010. This study is aimed at investigating the influence of the variation of roughness level of specimen towards the layer thickness of the hot dipped galvanizing of steel AISI 1010. The level of roughness of the specimen is obtained from grinding on grid 100, 500, 800, and 1000. This process causes difference in the roughness of the surface which is measured by using the Surface Roughness Test. The controlled variable is dipping temperature of 480oC. The time of hot dipped galvanizing is 6 minutes, while the time of grinding is 3 minutes. The test done in this study is non destructive test with spray test. The result showed that the layer thickness increased as the function of the roughness.Keywords: hot dipped galvanizing, spray test, layer thickness surface roughness.
Optimasi Parameter Pembubutan Terhadap Kekasaran Permukaan Produk Utami Dewi, Franscisca Gayuh; Gapsari, Femiana
Jurnal Rekayasa Mesin Vol 4, No 3 (2013)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

Machining parameters in turning processes including cutting speed, depth of cut, feed rate, and the length of the cutting parameters affect the product quality. One of the required product quality is the level of surface roughness. Reseach used response surface experimental based on central composite design to develop the empirical method of relationship between cutting parameters and surface roughness. Furthermore, an optimization is also conducted by using desirability function approach to determine the combination of cutting parameters in order to have low surface roughness of product. The results show that the machining parameters (depth of cut, length of cutting, cutting speed) have significant impact to the surface roughness of product. Based on the results, the mathematical model: Y = 1.109 -0.068(X ) – 0.111(X 2 )-0.098(X 3 ) + 0.268 (X 1 ) 2 + 0.17 (X 2 ) 2 + 0.106 (X 3 ) 2 + 0.086X 1 X 2 - 0.073XKeywords: surface roughness, machining, depth of cut, cutting speed.
Pengaruh Variasi Konsentrasi Inhibitor dari Kitosan Sisik Ikan terhadap Perilaku Korosi Besi ASTM A36: Studi Ekstrapolarisasi Tafel dan EIS Hidayatullah, Syarif; Gapsari, Femiana; Setyarini, Putu Hadi
Jurnal Rekayasa Mesin Vol 11, No 1 (2020)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2020.011.01.6

Abstract

Corrosion is the deterioration of metal that can reduce its yield strength, ultimate strength, financial losses, waste of natural resources, and endanger security. Thus, the corrosion rate must be slowed, or if possible, stopped. This study aimed to investigate the mechanism of corrosion protection by using corrosion inhibitors of chitosan extracted from fish scales on ASTM A36 steel. ASTM A36 steel was used as the specimen with a thickness of 3 mm. Fish scales powder was used as chitosan source extracted by using three mechanisms, i.e., deproteination (7% NaOH immersion), demineralization (immersion of 1 M HCl in 100 ml) and deacetylation (immersion process with 70% NaOH concentration). Corrosion inhibitor was composed of 8 g of chitosan from fish scales, 50 ml of distilled water, and 1 ml of CH3COOH. Corrosion protection with the inhibition method was applied with variations in the inhibitor concentration (1000 ppm, 2000 ppm, 3000 ppm, 4000 ppm, 5000 ppm, and 6000 ppm). The corrosion rate was tested by the polarization method and Electrochemical Impedance Spectroscopy (EIS). The result demonstrated that the effectiveness of corrosion protection started to increase from the concentration of 1000 ppm, 2000 ppm, 3000 ppm to 4000 ppm, with an effective value of 46.444%, 56.386%, 59.691%, and 72.630%, respectively. However, the effectiveness level started to decline from the concentrations of 5000 ppm to 6000 ppm, with 67.388% and 59.276%, respectively. This phenomenon occurs due to the inhibitor concentration has exceeded the maximum limit, so the interaction between inhibitor molecules was higher than the interaction between the inhibitor and the metal surface.
Pengaruh Besar Arus Listrik pada Proses Wire Edm Terhadap Profile Error Involute Roda Gigi Lurus Gapsari, Femiana; Sugiarto, Sugiarto; Bagus, Nugroho
Jurnal Rekayasa Mesin Vol 2, No 3 (2011)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

Wire Electric Discharge Mechine (EDM) is one of non conventional metal cutter machines. This machine is used to form machine components which has complex form and needs high precision. One of the machinery parameters which influences cutting precision on Wire EDM is the amount of pulse current. The form of involute profile of gear is a form which has complexity and high precision which often changes the form of geometry profile. This studyis aimed at investigating the extent of the influence of the amount of current parameter on Wire EDM towards the profile error involute spur gear. Thi study is experimental design, the independent variable used is pulse current with variation of 3 ampere, 4 ampere, 5 ampere, 6 ampere, and 7 ampere. The dependent variable in this study is profile error involute spur gearwhich later will explain the extent of cutting distortion. The result of this study showed that the higher the electric current, the higher the level of profile error involute spur gear. This means that the level of the precision is getting lower. The level of the lowest profile error involute, which is 0.0907 mm, found at 3 ampere pulse current, while the highest level of profile error involute, which is 0.1256 mm, found at 7 ampere electric current.Keywords: wire edm, pulse current, profile error involute, spur gear.
DESIGNING LINE BALANCING FOR AMMUNITION BOX PRODUCTION USING HEURISTIC METHOD Hariti Srijayasari; Pratikto Pratikto; Femiana Gapsari
Journal of Engineering and Management in Industrial System Vol 6, No 2 (2018)
Publisher : Badan Penerbit Jurnal, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jemis.2018.006.02.5

Abstract

PT XYZ is a State-Owned Enterprise that produces military equipment. Due to an increasing demand for such equipment every year, ammunition box sub-department asked their workers to work overtime and the total cycle time of ammunition box lid is higher than that of the ammunition box. Heuristic approaches, namely the Birnie Helgeson (RPW) and Moodie Young, are used to overcome these issues. This study aims to improve line balancing efficiency of ammunition box production. The findings showed that the Moodie Young method resulted in a 7.98% increase in line efficiency of the ammunition box lid and 21.77% increase in that of the ammunition box. In addition, the balance delay value decreased as much as the line efficiency. There are 9.09 and 152.87 decrease in the smoothing indexof the ammunition box lid and the ammunition box. The Moodie Young method cut the total labor cost to 9,597,170 rupiahs.
PERANCANGAN KESEIMBANGAN LINTASAN PRODUKSI AMMUNITION BOX MENGGUNAKAN METODE RANK POSITIONAL WEIGHT Hariti Srijayasari; Pratikto Pratikto; Femiana Gapsari
Prosiding SNST Fakultas Teknik Vol 1, No 1 (2018): PROSIDING SEMINAR NASIONAL SAINS DAN TEKNOLOGI 9 2018
Publisher : Prosiding SNST Fakultas Teknik

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Abstract

PT XYZ adalah perusahaan industri manufaktur di Indonesia dalam lingkup BUMN (Badan Usaha Milik Negara) yang bergerak dalam bidang produk militer. Objek pengamatan yang diambil adalah produk pendukung yaitu ammunition box. Ammunition box adalah tempat untuk menempatkan munisi yang diproduksi. Total waktu siklus di bagian pembuatan tutup dan pembuatan badan ammunition box berbeda sehingga menyebabkan bottleneck pada bagian perakitan akhir yang dapat mempengaruhi efisiensi lini produksi. Penumpukkan badan ammunition  box di perakitan akhir mengakibatkan proses perakitan di bagian perakitan akhir terhambat. Oleh karena itu, tujuan dari penyeimbangan lintasan produksi adalah untuk membantu perusahaan manufaktur dalam mendesain dan pengimplementasikan perbaikan terhadap sistem produksi yang ada saat ini. Dalam penelitian ini metode yang digunakan adalah metode Helgeson Birnie (Rank Positional Weight) Dalam metode ini dijelaskan bahwa proses perakitan terdiri dari beberapa elemen pekerjaan dengan urutan ketergantungan terhadap elemen pekerjaan sebelumnya. Hasil pengolahan data menunjukkan metode Helgeson Birnie (RPW) memberikan efisiensi lini sebesar yaitu 83,17% pada bagian pembuatan tutup ammunition box, 97,99% pada bagian pembuatan badan ammunition box, dan 100% pada bagian perakitan akhir. Hasil rancangan Helgeson Birnie (RPW) memberikan peningkatan efisiensi yaitu 39,11% pada bagian pembuatan tutup ammunition box, 53,45% pada bagian pembuatan badan ammunition box, dan 7,2% pada bagian perakitan akhir. Kata kunci : keseimbangan lintasan, manufaktur, waktu siklus
Surface Characterization on Electrophoretic Deposition Oof 316l Stainless Steel with Dissolved Chitosan for Biomedical Application Putu Hadi Setyarini; Femiana Gapsari; Apollo Ode Rea Harjo
International Journal of Mechanical Engineering Technologies and Applications Vol 3, No 1 (2022)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2022.003.01.6

Abstract

Of many compounds materials, metallic biomaterial is widely used in human medical devices. An implant material's corrosion resistance impacts its flexibility and longevity. This corrosion resistance is also an important consideration for biocompatibility. This biomaterial contains stainless steel whcih may corrode after being installed in the human body since  the passivity of stainless steel disappears when it is exposed to acids in the human body for a long duration. In addition, lacks of oxygen inhibits the formation of a new Cr2O3 layer for corrosion protection. Based on this phenomenon, an advance treatment is required to improve the resistance corrosion of implant. This study investigates the effect of the concentration and duration of chitosan on the thickness and corrosion resistance of biomaterials. The concentration of chitosan used was 0.08%, 0.16%, and 0.24% while the voltage used was constant at 10 V. The test results demonstrated the lowest corrosion rate occrured for 0.24 % chitosan concentration with 30 minutes coating duration. The lowest corrosion rate achieved was 0.014 mmpy and the maximum thickness was 75.4 μm. This study could be then used as a new solution to increase the safety of existing implants using biodegradable and non-toxic compounds. The next experiment should be implantation in real human body.
Co-Authors A.A. Ketut Agung Cahyawan W Angga Saputra Apollo Ode Rea Harjo Budi Purnomo Djarot B. Darmadi Dwi Hadi Sulistyorini Fikrul Akbar Alamsyah Franscisca Gayuh Utami Dewi Hariti Srijayasari Hariti Srijayasari M.Pd S.T. S.Pd. I Gde Wawan Sudatha . Nugroho Bagus Pratikto Pratikto Putu Hadi Setyarini Putu Hadi Setyarini Sugiarto S Suparjon Suparjon Syarif Hidayatullah