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Simulation, Experimental and Analitical Study of Deflection at End Curved Beam Affected by Single Concentrated Load Dewa Ngakan Ketut Putra Negara; Anak Agung Istri Agung Sri Komaladewi
Jurnal Energi Dan Manufaktur Vol 3, No.1 April 2009
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Deflection has an important role in order to design structure or machine component, beside consideration of stresscalculation. This is due to although stress is still smaller then stress allowed by material strength, but probably happen thatdeflection exceeds limit allowed. That condition affects serious hazard on machine elements or structure due to it can affectof component deviate from its main function. One of element which is often experience of deflection is beam. Beams playsignificant roles in many engineering applications, including buildings, bridges, automobiles, and airplane structures. In thisresearch, material to be used was Steel ASTM 1060, with specimen in the form of curved beam. Physical condition of beamwas modeled use of BEAM3 2D. Variation of loads to be applied were W = 100, 150, 200, 250, 300, 350, 400, 450, 500, and550 gr in vertical direction. The result of simulation was verificated by analytical and experimental data. Evaluation wascarried out by statistical test (t-test). The result of simulation is categorized to be good if the result of simulation is samewith analytical and experimental data. The result of research shows that loading has a significant effect on the deflection.The higher load affect the higher of deflection Modeling use of BEAM3 2D gave good result of deflection. This is showedfrom t-test have done, where the result of simulation was same with analytical and experimental data. Other advantage ofsimulation was deflection result obtained was not limited only at the end of beam, but it can predict of deflection at eachnode or point desired
Karakteristik Traksi dan Kinerja Transmisi pada Sistem Gear Transmission dan Gearless Transmission A.A.I.A. Sri Komaladewi; I Ketut Adi Atmika
Jurnal Energi Dan Manufaktur Vol 7 No 1 (2014): April 2014
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Abstrak : Sistem transmisi adalah salah satu komponen penting pada sistem drive train, yang fungsiutamanya adalah mentramsmisikan atau mentransformasikan torsi yang keluar dari mesin sampaike torsi yang terjadi pada roda penggerak. Ratio transmisi berpengaruh terhadap besarnya torsiyang dapat ditransmisikan, sedangkan jumlah tingkat kecepatannya berpengaruh terhadapkehalusan (smoothness) proses transmisi dan transformasi daya pada sistem transmisi tersebut.Karakteristik traksi dan kinerja transmisi kendaraan yang diuji adalah Toyota Kijang Inova tahun2012, Pemodelan kinerja traksi dilakukan dengan metode simulasi. Karakteristik traksi dari sistemtransmisi kendaraan dianalisa paada beberapa tingkat kecepatan untuk mengatasi berbagaihambatan sepanjang kondisi operasi kendaraan. Perhitungan awal dari ratio gigi antara yangtertinggi dan terendah dapat dicari dengan menggunakan hukum Progresi Geometri. Ratio dariroda gigi akhir (terendah) ditentukan oleh kecepatan maksimum kendaraan yang akan dirancang.Sedangkan traksi maksimum atau tanjakan maksimum menentukan besar ratio roda gigi awal(tertinggi). Kemudian ratio diantara kedua batas tersebut dibuat sedemikian rupa agar traksi yangdihasilkan kendaraan dapat mendekati karakteristik idealnya. Modifikasi ratio gigi transmisi daristandarnya mendapatkan kebutuhan traksi yang lebih kecil untuk kecepatan yang sama, baikpemasangan 4 tingkat, 5 tingkat, maupun 6 tingkat kecepatan. Jarak kurva traksi antara dua ratiogigi menunjukkan besarnya traksi yang tidak terpakai. Dari grafik kinerja transmisi menunjukkansemakin banyak tingkat transmisi, semakin kecil traksi yang terbuang.Karakteristik traksi mendekatikarakteristik idealnya pada gearless transmission system dengan 10 stages.Kata kunci: drive train, rasio transmisi, kinerja traksi, progresi geometri, gearless transmissionAbstract : The transmission system is one of the important components in the drive train system, whose mainfunction is to transmit or to transform out of the engine torque to the torque that occurs at the drivewheels. Transmission ratio affects the amount of torque that can be transmitted, while the numberof speed levels affect the fineness (smoothness) transmission process and the transformation ofpower in the transmission system. Traction characteristics and transmission performance vehiclesare tested on Toyota Kijang Inova 2012. Modeling traction performance is realized with simulationmethods. Traction characteristics of the vehicle transmission system is analyzed at several levels ofspeed to overcome various obstacles along the vehicle operating conditions. Preliminarycalculations of the gear ratio between the highest and lowest can be found using GeometryProgression law. Ratio of last gear (the lowest) is determined by the maximum speed of the vehicleto be designed. While the maximum traction or maximum incline determine the initial gear ratio (thehighest). Then the ratio between the two limits is made such that the resulting traction vehicle canapproach the ideal characteristics. Modification of the transmission gear ratio from the standardcondition yield traction needs which is smaller in the same speed, whether the installation of 4levels, 5 levels, more even at 6 levels of speed.The distance of traction curve between 2 of gearratio indicates the amount of unused traction. From the graph of transmission performance indicatethat the more the level of transmission, the less traction is wasted. Traction characteristicsapproaching the its ideal characteristics at gearless transmission system with 10 levels.Keywords: drive train, transmission ratio, traction performance, geometric progression, gearlesstransmission
Eksperimental Adsorpsi dan Absorpsi Air Permukaan menggunakan Komposit hibrida Batu Basalt/ Moringa oleifera/ Tepung Lengket Alesandro Tarigan; I.D.G Ary Subagia; A.A.I.A Sri Komaladewi
Jurnal Energi Dan Manufaktur Vol 12 No 1 (2019)
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (545.375 KB) | DOI: 10.24843/JEM.2019.v12.i01.p04

Abstract

Pada penelitian ini, komposit hibrida sebagai adsorbsi dan absorpsi polutan pada air permukaan telah dibuat. Komposisi hibrida terdiri dari batu basalt (BB) dan moringa oleifera (MO) sebagai pengisi dan tepung lengket (TL) sebagai matrik. Komposisi fraksi berat yaitu 40 wt% pengisi dan 60 wt% matrik telah diaplikasikan. Proses pencetakan panas (hot-press) telah digunakan untuk memproduksi komposit hibrida masing-masing variasi dengan melalui suhu 200° Celcius dan tekanan 2000 psi. Tujuan penelitian menginovasi kemampuan bahan dalam fungsi sebagai penyerap dan pengikat polutan pada air permukaan. Perendaman komposit hibrida selama 14 hari pada air permukaan telah dilakukan untuk menguji sifat adsorpsi dan absorpsi. Turbidity dilakukan untuk menentukan nilai kekeruhan dan nilai kandungan micro-organisme pada air permukaan sebelum dan setelah penambahan komposit hibrida. Hasil pengujian ditunjukan pertambahan paling tinggi yaitu pada spesimen dengan komposisi 40% batu basalt dan 60% tepung lengket dengan pertambahan berat sebesar 21,11 gram selama 336 jam dan paling kecil pada spesimen dengan komposisi 40% moringa oleifera dan 60% tepung lengket dengan pertambahan berat sebesar 4,15 gram selama 336 jam. Pada air dilakukan pengujian terhadap kekeruhan, pH dan bakteri pada air setelah dilakukan pengujian, dimana hasil pada spesimen dengan komposisi 40% moringa oleifera dan 60% tepung dapat mengurangi bakteri coliform sebesar 78,6%. hybrid composition is consisted of basalt and moringa oleifera with filler wood flour as a matrix. The composition of heavy fractions is 40 wt% filler and 60 wt% matrix has been applied. The hot-press process has been used to produce hybrid composites of each variation through a temperature of 200° Celsius and a pressure of 2000 psi. The purpose of this research is to inovate the ability of materials to function as absorbent and as binder of pollutants in surface water. Immersion of hybrid composites for 14 days in surface water has been carried out to test the characteristic of adsorption and absorption. Turbidity is done to determine the turbidity value and the value of micro-organism content in surface water before and after the addition of hybrid composites. The test results showed the highest increase in the specimens with a composition of 40% basalt stone and 60% sticky flour with a weight gain of 21.11 grams for 336 hours and the smallest in specimens with a composition of 40% moringa oleifera and 60% wood flour with weight gain amounting to 4.15 grams for 336 hours. In the water testing of turbidity, pH and bacteria on water after testing, the results on specimens with a composition of 40% moringa oleifera and 60% wood flour can reduce coliform bacteria by 78.6%.
The Influence of Heat Treatment and Quencing Media at Bronze 80% Cu–20% Sn toward Fatique Life Anak Agung Istri Agung Sri Komaladewi; I Ketut Suarsana
Jurnal Energi Dan Manufaktur Vol 3, No.1 April 2009
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Production of the Balinese gamelan product rest on molding process which then continued with forging process, adjustment,and finally the finishing process. But still often to make the failure from this material like. The material become brokebecause heavy thing with the user processing (playing gambelan) with continuity in the long time. The broke that happenfrom the heavy thing by the continuety that is called fatigue. At this examination the things that will be up is how much theheat treatment influence and the cooler thing with the fatigue life through the Reversed Bending process. By to variated theheat treatment and cooler thing to Bronze mixture 80%Cu and 20%Sn. This examination to aim at knowing the heattreatment influence and cooler thing at the composition of Bronze 80%Cu and 20%Sn about the fatigue life.The makingprocess of this things made by copper solution and the white Tin with the composition are 80%Cu and 20%Sn by variatedheat treatment and cooler media. The produce of this solution will print with the Reversed Bending speciment. Then thespeciment gift the heat treatment about 6500 C, 7000 C till 7500 C, and then the speciment keep cold by the water, oil and theair. The thing will be analize from the breach counture, Macro Structure and Micro Structure.The examination produceshowing the growing up at the fatigue life in the Bronze mixture 80%Cu - 20%Sn, From the heat treatment 6500 C, 7000 Cand 7500 C and become the drop age fatigue with the water cooler media with the age fatigue abaut 36621 cycle, and thefatigue by oil about 44975 cycle and the air cooler age fatigue about 55191 cycle. The inspection makro structure thebreach face colouring litle bit dark and the inspection mikro structure, the metal structure lool more bright.
A Analisa Kinerja Pembangkit Listrik Dual-Fuel Kapasitas 40 Kw Berbasis Gasifikasi Limbah Sabut Kelapa Di PT. Indonesia Power Pesanggaran Bali A.A Ngurah Wisnu Kusuma; I Gusti Bagus Wijaya Kusuma; A.A.I.A.S Komaladewi
Jurnal Mettek: Jurnal Ilmiah Nasional dalam Bidang Ilmu Teknik Mesin Vol 5 No 1 (2019)
Publisher : Program Studi Magister Teknik Mesin Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/METTEK.2019.v05.i01.p04

Abstract

Telah dilakukan penelitian tentang kinerja pembangkit listrik dual-fuel 40 kW berbahan bakar solar dan bahan bakar hasil gasifikasi dari limbah sabut kelapa. Penelitian ini bertujuan untuk mengetahui konfigurasi laju alir udara pembakaran (AFR) terhadap daya keluaran mesin diesel dan penghematan minyak solar yang dihasilkan. Pengukuran dilakukan dengan mengukur konsumsi bahan bakar solar, laju alir gas produser, daya genset, dan konsumsi sabut kelapa pada bukaan valve inlet udara pembakaran setengah dan penuh dengan pemberian beban listrik 0-100%. Data menunjukan bahwa konfigurasi laju alir udara pembakaran (AFR) yang baik digunakan adalah bukaan setengah dan kinerja mesin diesel dual-fuel menggunakan bahan bakar biomassa sabut kelapa mampu mengurangi konsumsi solar sebesar 41.4% Research on the performance of 40 kW dual-fuel power plants with diesel fuel and gasification fuel from coconut fiber waste. This study aims to determine the configuration of combustion air flow rate (AFR) on diesel engine output power and saving diesel fuel produced. Measurements were made by measuring diesel fuel consumption, producer gas flow rate, generator power, and coconut fiber consumption at the opening of the half and full combustion air inlet valve by providing 0-100% electric load. Data shows that the configuration of the combustion air flow rate (AFR) good to use is the half openings and the performance of dual-fuel diesel engines using coconut fiber biomass fuel can reduce diesel consumption by 41.4%
Analisis Defleksi Pada Rangka Alat Pembuat Briket Sampah Organik Gregorius Agung Pamungkas; I Gusti Ngurah Priambadi; Anak Agung Istri Agung Sri Komaladewi
Jurnal Mettek: Jurnal Ilmiah Nasional dalam Bidang Ilmu Teknik Mesin Vol 6 No 2 (2020)
Publisher : Program Studi Magister Teknik Mesin Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/METTEK.2020.v06.i02.p06

Abstract

Rangka merupakan bagian yang paling penting dari sebuah konstruksi dimana kekuatan rangka sangat ditentukan dari bentuk dan dimensi. Kekuatan rangka pada konstruksi harus memenuhi aspek keamanan serta harus memperhatikan faktor kekuatan rangka itu sendiri. Menghitung kekuatan rangka dari alat pembuat briket sampah organik dilakukan dengan menggunakan cara simulasi untuk mengetahui kekuatan rangka dalam menerima beban. Simulasi yang dilakukan dengan menggunakan software SolidWorks 19 dengan pembebanan statis, dan dengan variasi beban 110 kg dan 4500 kg dengan menggunakan material baja tipe ASTM A36. Proses simulasi yang telah dilakukan dengan pembebanan 110 kg nilai tegangan maksimum sebesar 6.66046 N/mm2 (Mpa), nilai displacement maksimum sebesar 0.0114 mm, nilai strain maksimum sebesar 0.0000167973 mm, dan nilai safety factor minimal sebesar 38. Dengan pembebanan 4500 kg nilai tegangan maksimum sebesar 248.26596 N/mm2 (Mpa), nilai displacement maksimum sebesar 0.4231 mm, nilai strain maksimum sebesar 0.0006269075 mm, dan nilai safety factor minimal sebesar 1. Pembebanan 110 kg rangka masih dapat menahan beban dan nilai stress masih jauh dari standar yield strength material ASTM A36 sebesar 250 Mpa. Terdapat perubahan bentuk rangka saat dilakukan pembebanan tetapi masih bersifat elastis, pada pembebanan 4500 kg rangka tidak dapat menahan beban dan nilai stress mendekati standar yield strength material ASTM A36 sebesar 250 Mpa. Hasil simulasi menunjukkan bahwa rangka alat pembuat briket sampah organik dengan beban 110 kg dan dengan material Baja tipe ASTM A36 mampu menahan beban dengan lebih baik. Dibandingkan dengan beban 4500 kg dan dengan material yang sama. The frame is the most important part of a construction where the strength of the frame is very much determined from the shape and dimensions. The strength of the frame in construction must fulfill the safety aspect and pay attention to the strength factor of the frame itself. Calculating the strength of the frame from the organic waste briquette maker is done by using a simulation method to see the strength of the frame in receiving the load. Simulations carried out using solidWorks 19 software with static loading with a load variation of 110kg and 4500 kg using ASTM A36. The simulation process that has been carried out with a load of 110 kg with a maximum stress value of 6.66046 N / mm2 (Mpa), a maximum displacement value of 0.0114 mm, a maximum strain value of 0.0000167973 mm, and a minimum safety factor value of 38. At the load of 4500 kg the maximum stress value is 248.26596 N/mm2 (Mpa), the maximum displacement value is 0.4231 mm, the maximum strain value is 0.0006269075 mm, and the safety factor value is at least 1. A load of 110 kg the frame can still with stand the load and the stress value is still far from the standard yield strength material ASTM A36 of 250 Mpa. There is a change in the shape of the frame when it is charged but still elastic, at the load of 4500 kg the frame cannot with stand the load and the stress value is close to the standard yield strength material ASTM A36 of 250 Mpa. Simulation results showed that the frame of the organic waste briquette making tool with a load of 110 kg and with steel material type ASTM A36 is able to with stand the load better. Compared to a load of 4500 kg and with the same material.
Surface Modification of Microfiltration Polypropylene Membrane for Molecular Air Filtration A.A.I.A.S Komaladewi; PTP Aryanti; I D G Ary Subagia; I W Surata; I G Wenten
International Journal of Engineering and Emerging Technology Vol 4 No 1 (2019): January - June
Publisher : Doctorate Program of Engineering Science, Faculty of Engineering, Udayana University

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Abstract

Microfiltration polypropylene (MPP) membrane has increasingly been used in separation processes due to its good chemical and mechanical stability, high selectivity to submicron particles, and low cost. In this paper, the MPP membrane was modified by coating the surface with a composite polysulfone (PSf)/PEG400/ZnO layer. Then, the modified MPP membrane was used for fine particle removal from air. Performance of modified MPP membrane as a function of polymer and ZnO nanoparticles (ZnO-NPs) concentration in coating solution, and coating time, was investigated. The SEM image showed that the presence of ZnO-NPs in polymer solution generated macrovoids in the coating layer. Permeate flux decreased with increasing polymer and ZnO-NPs concentration, but the flux increased with increasing coating time. Meanwhile, fine particle removal efficiency increased with the increase of operating pressure. A stable air flux of 19 L m-2 h-1 was obtained at ZnO-NPs concentration of 3 wt.%. The removal efficiency of PM1, PM2.5, and PM10 at operating pressure of 2 bar were 70%, 74%, and 70%, respectively.
PENERAPAN DIGESTER ANAEROBIK PORTABLE KAPASITAS 500 LITER DI GAPOKTAN SATO AMERTA UTAMA DESA BALUK I.K.A. Atmika; I.G.A.K. Suriadi; A.A.I.A.S. Komaladewi; T.G.T. Nindhia; I.P.A. Astawa
Buletin Udayana Mengabdi Vol 22 No 1 (2023): Buletin Udayana Mengabdi
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/BUM.2023.v22.i01.p03

Abstract

Livestock activities carried out by the Baluk village community with a minimum number of livestock in each family of 2 cows and pigs have the potential to develop new and renewable energy systems, in this case household-scale biogas energy. Thus each household can produce energy for their daily needs. Optimization and cost efficiency with the introduction and application of biogas/portable biogas digester technology by utilizing cow dung as a daily energy source is the focus of this service. A portable anaerobic digester was prepared in this work as a solution. Its capacity is around 500 liters making it suitable for household scale livestock manure processing. The material used for the digester is stainless steel 304. The digester is equipped with an agitator to optimize biogas production. Cow dung slurry (50% cow dung + 50% water) is used to feed the digester. There are 2 variations of the slurry loading speed carried out in this work, namely 5 liters/day slurry and 10 liters/day slurry. The biogas production rate is around 51.7 liters of biogas/day if filled with 5 liters/day of slurry. The biogas production rate was found to increase significantly to 82 liters of biogas/day if filled with 10 liters/day of slurry. So to overcome community problems and in carrying out solutions to village problems, several methods are used, including: counseling methods, mentoring methods, mutual cooperation methods, methods of applying appropriate technology, and pilot methods. The activities were carried out on August 23 2020 and September 18 2020. Keywords : Biogas, digester portable, optimation, 500 liter
Analisa Traksi Untuk Kendaraan Truk Angkutan Barang Jalur Denpasar-Gilimanuk Chatur Adhi, IGAK; Komaladewi, AAIA Sri; Atmika, IKetut Adi; Suriadi, IGAK
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 2, No 2 (2012): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

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Abstract

Road condition and plain all of the line traffic  Denpasar- Gilimanuk have many slope upward. Beside of many slope upward declivity and long slope upward have many variation too. We must give many attention for that condition in design minimum power engine to vehicle truck,beside the other factors like wind velocity , kind of asphalt , curves ,etc.            The purpose of this research to recite road condition (slope upward , wind velocity ,density) all of the line traffic Denpasar – Gilimanuk,and then will be count minimum traction need of vehicle truck that across that road.            From this research result obtained that the needed traction to overcome all resistance especially slope upward resistance are 6000 N and the estimate needed power about 220 hp from characteristic power torsi.
Analisis Material Requirement Planning dalam Pengendalian Persediaan Bahan Baku pada PT X Widyastari, Ni Luh Putu Winni; I Made Dwi Budiana Penindra; Bryan Estavan Imanuel Sitanggang; Anak Agung Istri Agung Sri Komaladewi; Mia Juliana; Ni Made Cyntia Utami
JURNAL RISET DAN APLIKASI TEKNIK INDUSTRI Vol. 3 No. 01 (2025): Volume 03 Issue 01, Agustus 2025
Publisher : Study Program of Industrial Engineering, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JRATI.2025.v03.i01.p07

Abstract

PT X adalah perusahaan manufaktur yang berfokus pada pembuatan komponen otomotif berbahan dasar karet sintetis. Produk yang dihasilkan oleh PT X antara lain Oil Seal, Valve Steam Seal, O-Ring, dan Rubber Part. Pengendalian persediaan pada PT X dianggap kurang optimal karena karena masih adanya bahan baku yang mengalami overstock. Overstock pada PT X menyebabkan terjadinya pemborosan modal kerja yang tertanam dalam persediaan bahan baku. Penelitian ini bertujuan untuk mengetahui peramalan permintaan bahan baku KS-25 di PT X dan mengetahui penerapan metode Lot Sizing yang optimal dalam pengendalian persediaan bahan baku KS-25 di PT X. Penelitian ini dilakukan dengan peramalan permintaan serta analisis lot sizing dengan metode Economic Order Quantity, Periodic Order Quantity, Lot for Lot dan Min-max. Metode lot sizing yang memberikan total inventory cost terendah yaitu metode POQ dengan biaya sebesar Rp 837.982.027. Hasil peramalan pada penelitian ini menggunakan tiga metode penelitian yaitu metode moving average, weighted moving averages, dan exponential smoothing. Hasil yang didapatkan menunjukkan bahwa metode exponential smoothing (α=0,8) merupakan hasil terbaik dengan jumlah error terkecil.